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Garcinia cambogia side effects are said to be few and of minor
significance, according to the marketers of the diet pill. Instead, the
general public is predominately exposed to claims of garcinia cambogia
benefits, centering around the weight loss supplement's purported
capability to confer quick fat loss.
However, an eligible body of scientific evidence unravels notable diabetes-mediating garcinia side effects –some of them closely resemble the documented diabetes-nourishing statins' side effects ("statins" are very popular cholesterol-lowering medications).
The arguably greatest personal challenge in corporate cultures is the discovery of the real truth about a seemingly endless list of things.
The difficult task applies to and engulfs politics, economics, science, mainstream medicine, or other commercialized entities such as the weight loss industry. The example investigated here, with garcinia cambogia extract (GCE) out of the weight loss supplement industry, authenticates the soundness of this general pattern.
(Note: I have intentionally repeated certain critical points throughout the lengthy article to facilitate and improve understanding of the rather complex information presented in this report.)
(An aside: I've written a highly shortened exclusive version of this report for greenmedinfo.com, "The World's Largest, Open Access, Natural Medicine Database". A link to that article, entitled "Does A Popular Dr. Oz-Endorsed Diet Supplement Promote Diabetes?" can be found and accessed by visiting "List Of My Off-Site Articles" under the 'Articles' link icon at the top of every webpage of rolf-hefti.com.)
"Journalism works with the five W’s and one H: Who? Where? When? What? Why? and How? Investigative journalism adds a crucial seventh question: Is it true?" (Helke Ferrie, Medical Researcher & Author)
Garcinia cambogia (GC) is a fruit. The garcinia cambogia fruit is also known by the names of malabar tamarind, gambooge, kukum, brindleberry, and bitter kola , or kudam puli and garcinia gummi-gutta. Typically, garcinia nutritional diet supplements contain a botanical extract derived from the rind of the fruit. Supplements of garcinia cambogia extract usually consist of concentrated amounts of one of the alleged main "active" or essential elements in garcinia cambogia's rind, hydroxycitric acid (HCA) or hydroxycitrate, a chemical related to citric acid [2,3]. (On occasion, some people had mistakenly referred to the natural weight loss supplement as cambogia garcinia.)
HCA garcinia cambogia extract has been most famously advertised by the highly popular medical authority and celebrity doctor Mehmet Oz, MD (widely known as "Dr. Oz" or "Doctor Oz"), at his popular TV show ("The Dr. Oz Show") and the Doctor Oz website, beginning in 2012, as the "holy grail" of weight loss management, a "fat buster", and a "breakthrough in natural weight-loss", portraying it as a safe effective natural diet supplement . Doctor Oz has habitually dispensed various weight loss tips on his award-winning television show.
The popularity of garcinia cambogia weight loss supplements soared after their public endorsement by idolized television advice guru Doctor Oz, and many marketers began claiming that this slimming aid is one of the best diet supplements. A phenomenon that has been called the "Dr. Oz effect" (a spin-off of a broader term, the "celebrity effect"), prompting many people with weight issues to take garcinia cambogia extract, especially as the natural diet pill promised to offer rapid weight loss.
The most popular, top-selling garcinia weight loss supplement in the US has been "Hydroxycut", that contains a proprietary botanical mixture of the plant (called "Super Citrimax", "CitriMax", or "Citrin") and other ingredients. Unfortunately, the ingestion of certain ephedra/ephedrine-free garcinia products of the alleged supreme garcinia cambogia brand Hydroxycut had been linked to several cases of liver damage, rhabdomyolysis (a serious muscle disorder), and other toxicities [4,5]. As one might expect, this has caused some people to ask, “is garcinia cambogia safe?”
Reading through the marketing messages of the (online) promoters and sellers of garcinia diet pills and websites with (fake) garcinia cambogia reviews (most of which are sites selling GCE with enticing promises such as “the best garcinia cambogia pills”), one of their typical main claims is –apart from that it is one of the best diet pills to buy– that the diet product has no major side effects or that it is one of the "safest dietary supplements available on the market".
For the most part, purportedly highly credible and highly authoritative medical websites (e.g., WebMD.com, an online representation of the orthodox medicine business monopoly) and nutrition websites make similar bold assertions about the general lack of (severe) garcinia cambogia side effects.
Besides the advertising claims that GCE-HCA products are safe diet pills and natural agents of fast weight loss (or weight control), you can even find research studies on garcinia cambogia side effects and benefits in the medical literature, that state, "it cannot be concluded that Garcinia/HCA is unsafe" , as denoted in one such paper. Although, no data presented in that same review study  rated that garcinia-cambogia supplements are safe in meaningful long-term studies, lasting at least two years, whether in animals nor humans.
The commercial marketing of certain plants and herbs for obesity (e.g., garcinia cambogia for weight loss) has experienced an expansion to affiliated health conditions. Some research investigators had proposed a number of physiological mechanisms that could explain how plant compounds can have benefits for diabetics, such as:
Among the topics and claims of herbal medicine for diabetes (e.g., cinnamon for diabetes) and means to cure diabetes naturally, a positive relationship between garcinia cambogia and diabetes has also been intimated. The list of projected garcinia cambogia benefits includes the assertions that the extract supposedly (among other declarations) "reduces cravings for sweets and enhances the effectiveness of the body's own insulin", "allows the muscles of the body to absorb more glucose" and garcinia diet supplements "also bind up leftover glucose in the bloodstream" .
In rats, for instance, hydroxycitric acid-garcinia cambogia extract delayed glucose absorption in the small intestine while all of the supplied glucose eventually still got absorbed over the feeding period . Other garcinia cambogia studies with laboratory animals found that HCA-garcinia cambogia products have the capacity to somewhat improve a physiological hallmark of diabetes mellitus, namely oxidative stress insults to the body .
In response to such research propositions and findings, some promoters and vendors of herbal weight loss and garcinia cambogia products have also begun to recommend the (adjuvant) use of garcinia diet supplements in approaches of diabetes mellitus treatment (and the prevention of diabetes). In the classic garcinia cambogia episode of the Dr. Oz TV Show mentioned above, potential garcinia cambogia benefits for diabetics were also commented on (apart from other merits) by one of his guests who was promoting the value of the fat-burning diet pill, prompting Doctor Oz to exclaim about GCE that "in many ways it's the holy grail" .
Yet contrary to this interpretative framework, a rather thorough perusal of the medical evidence strongly supports the perspective that numerous garcinia cambogia side effects have diabetes-promoting activities. Hence, the popular claims that there are no major garcinia cambogia side effects, and that the natural diet supplement is very safe and ought be tallied among diabetes herbal remedies or botanical modalities are untrue.
Furthermore, what is of broader significance (as described and cited in this article) is that in juxtaposition to the common misleading or false rhetoric and hype about "miracle" garcinia cambogia products and minimal garcinia cambogia side effects, there is, in spades, plenty of misleading or false rhetoric and hype by the conventional medical business (the medical profession) about its various "wonder" products and services, and an underemphasis about their harms.
"The physiologic control of glucose homeostasis results from a balance between hepatic glucose release (glycogenolysis and gluconeogenesis) and dietary glucose absorption versus skeletal muscle and adipose tissue glucose uptake and disposal. Disruption of this delicate balance either through defects in insulin secretion, liver glucose output, or peripheral tissue glucose uptake results in pathophysiological states of insulin resistance and diabetes." (Makoto Kanzaki, PhD & Jeffrey E. Pessin, PhD, Diabetes Researchers) 
The pathophysiology of diabetes mellitus, the most typical diabetic symptoms, or the warning signs of diabetes type 2 are:
By and large, these well-characterized biological modifications define diabetes.
Type 2 diabetes mellitus (formerly called non–insulin-dependent diabetes mellitus or adult-onset diabetes), is much more prevalent than type 1 diabetes mellitus (traditionally referred to as insulin-dependent diabetes mellitus) .
As far as diabetes and weight loss diet pills concern, garcinia cambogia side effects sustain, foster, or aggravate, more or less, all of these clinical manifestations of diabetes through various (overlying) physiological mechanisms –independent from the consumption of either an adulterated or pure garcinia cambogia extract.
“Science consists in grouping facts so that general laws or conclusions may be drawn from them.” (Charles Darwin, 1809-1882, Naturalist & Originator of the Theory of Evolution)
How is diabetes caused? Over a century ago it had been observed that hemochromatosis, a disorder where iron accumulates in tissues (leading to iron overload), has the capacity to destroy pancreatic ß-cells (beta-cells) which can result in diabetes mellitus [23,24]. Iron carries a high inflammatory potential, particularly at higher doses, as a generating source of injurious reactive oxygen species (ROS), also known as free radicals [25-27].
Much pertinent research over the ensuing years has corroborated the diabetes-pancreas link. Specifically, that the killing or dysfunction of pancreatic insulin-secreting beta cells (from the islets of Langerhans), producing a pancreatic insulin deficiency, is among the prime contributors or causes of diabetes mellitus (the etiology of diabetes) [13,16,18,20,28] –in both diabetes type 1 and 2  (see Figure 1; "Figure" is abbreviated hereafter to "Fig."). Almost all new cases of diabetes, for example, carry beta cell antibodies, indicative of some irritating or harmful influence upon the pancreatic gland , or an overactive immune system. This lends support to the view of diabetes as a manifestation of a chronic (low-grade) inflammatory syndrome [322,323,336].
(Speaking of inflammatory injury to the pancreas, in another article of mine on L-tryptophan, 5-HTP, and serotonin, with the title "Tryptophan Side Effects: L-Tryptophan Is Far From Harmless" (direct link to it at the end of this article under Recommended next pages), I mentioned that certain inflammatory tryptophan metabolites, derived from pure tryptophan supplements, can orchestrate a degenerative-diabetogenic influence on the pancreas such as in the production of fibrosis.)
Diabetics, or obese individuals, often suffer from hyperlipidemia, or high blood fat content [31-34]. Fats are susceptible to free radical attacks, especially the long-chain polyunsaturated fatty acids (PUFAs), such as linoleic acid, EPA, or DHA, because of their multiple "exposed" (unoccupied) molecular double carbon bonds, creating a variety of harmful inflammatory chemicals [26,27].
Systemic fatty acid excess (hyperlipidema) results in injury to the brain. A high fat diet (of refined processed foods) –including the high intake of PUFAs, such as the purported "essential fats" (EFAs) linoleic acid and linolenic acid, also known as "vitamin F" or informally referred to as omega-6 fatty acids and omega-3 fats (alongside an inadequate supply of antioxidants [35,36])– induces an increase of inflammation and oxidative stress in the brain, leading to neuron injury and loss of certain cerebral regions (such as in the hypothalamus) that govern metabolism, glucose control, and energy homeostasis [22,37-39]. And, a high fat diet (of refined goods) can also destroy the insulin-producing cells in the endocrine pancreas (beta-cell apoptosis) via inflammatory events  (see Fig. 1).
"When hundreds all believe the same thing there is danger. It becomes unassailable. The contagion factor gives it more power." (Arthur Janov, PhD, Psychologist)
Since the 1930s and 40s (and subsequent decades) many good research experiments had demonstrated that stressors of all sorts (e.g., chemical toxins, physical insults, psychological traumas) regularly raise adrenaline and other catabolic stress hormones of the glucocorticoids/corticosteroids family such as cortisol [40,41].
Catabolic hormones, such as cortisol or the catecholamines (adrenaline, noradrenaline), trigger the release of fat stores (adipose lipolysis) into the blood [42-44] and signal the release of glucagon (from pancreatic islet alpha-cells).
Glucagon, too, gets activated by low blood sugar states (hypoglycemia) or an insulin deficit, and glucagon is a hormone responsible for raising the sugar content in the blood via (1) the induction of endogenous glucose production in the liver (=gluconeogenesis) and (2) the mobilization of liver glycogen stores (=glycogenolysis; glycogen is a storage form of glucose that some individuals had called "body starch") into the blood stream [45-47] (see Fig. 2).
And, (excess) free fatty acids in the blood are also glucogenic (akin to certain amino acids), activating gluconeogenesis and glycogenolysis [15,47], and raise the level of "sugar" (i.e., glucose) in the blood, conceivably as an adaptive maneuver to marshal the ideal fuel for cell metabolism, glucose.
But while stress hormone-mediated lipolysis, resulting in excessive blood fat concentration, enhances glucagon/lipid-induced (hepatic) glucose production (gluconeogenesis/glycogen synthesis) and its breakdown and release into the blood (glycogenolysis), raising blood glucose content, it suppresses glucose utilization by the body [48-50], creating an deficit of glucose inside of cells (neuroglucopenia, neuroglycopenia or intracellular glycopenia) and a glucose excess (hyperglycemia) in the blood stream, respectively .
In terms of diabetes and blood sugar level, both animal and human experiments rather convincingly indicated that hyperglycemia is primarily the result of "excessive glucose production via gluconeogenesis" (in the liver) and glucagon-mediated glycogenolysis –incited by free fatty acid mobilization (a.k.a lipolysis) or an insulin deficit– rather than the outcome of insulin resistance (i.e., insulin receptor dysfunction), an idea that has been most commonly postulated [47,49-53] (see Fig. 2).
"Enhanced lipolysis" and "overproduction of glucose" (excessive gluconeogenesis) are prominent characteristics of diabetes mellitus type 2 (T2DM) [15,54] and major events why in diabetes blood sugar levels are customarily high. So, high blood cortisol and high fat levels might be among the more meaningful signs and symptoms of hyperglycemia rather than insulin resistance.
For the most part, gluconeogenesis entails the production of glucose from protein breakdown (proteolysis) . A transitory hypoglycemic state (just like a variety of stressors) adaptively recruits catabolic stress hormones, such as the classical glucocorticoid cortisol , which raise the blood sugar value by cannibalizing body tissues (protein wasting) and turning them into glucose in the process of gluconeogenesis. To limit protein loss and, thus, the catabolic decay of the body structure, stress hormones concomitantly also trigger lipolysis .
In diabetes, cortisol levels are increased, spurring the production of glucose in the liver . And, as expected, diabetics have an up-regulated hepatic production of glucose [51,56]. This physiological state of elevated glucose production gets intensified by the administration of supplemental garcinia cambogia extract (containing HCA) because hydroxycitric acid-garcinia cambogia, like fatty acids from lipolysis or from a high-fat diet [50,53], activates liver gluconeogenesis [54,57,58] (see Fig. 2). (Diverging from this hyperglycemia-fostering action of garcinia cambogia extract, strangely, the most authoritative orthodox medical websites I've looked at uniformly claimed, by and large, in 2014/2015 when I originally worked on this report, that among the potential garcinia cambogia side effects is the diet supplement's potential to dangerously lower blood sugar levels (in conjunction with drug treatment for diabetes), apparently based on a single study with mice.)
While plasma cortisol concentration is elevated in diabetics, promoting hyperglycemia, their blood content of thyroid hormones, such as the active thyroid hormone triiodothyronine (T3) and its less operational precursor thyroid hormone, thyroxine (T4), are reduced .
T3 promotes glucose uptake and its metabolic clearance (glucose oxidation or "sugar burning"), whereas a loss of T3 enables and augments the accumulation of blood glucose, contributing to sustained hyperglycemia  and hypothyroidism  (see Fig. 2). Low thyroid function, especially low T3 blood concentration, therefore, should be tabulated among potential hyperglycemia symptoms or predictors. Cell energy atrophy, such as from a T3 deficit, engages iron, increasing its concentration and activity, and leads to lipid peroxidation-mediated tissue injury  (see Fig. 2).
Therefore, diabetic hyperglycemia is thought to be a consequence of:
All of the above physiological mechanisms are complexly interrelated (see Fig. 2).
Despite of these well-documented physiological processes, the popular sentiment in the culture and health care system today in the early years of the 21st century is –and has long been– that "sugar is toxic" (or “carbs are bad”) and that dietary "sugar causes diabetes", painting the substance as the direct fundamental culprit or cause of hyperglycemia rather than seeing hyperglycemia as a component of a syndrome or a symptom of diabetes relatively independent from, or indirectly related to, dietary sugar consumption. So the demonization of simple sugars has been systematic and overwhelming because it is a notion pushed by both conventional and unconventional natural medicine.
The primary physiological processes accredited for hyperlipidemia-induced hyperglycemia are:
Now, how does garcinia cambogia work? What are the primary physiological effects of GCE?
Garcinia cambogia diet supplements' main ingredient, hydroxycitric acid (HCA), inhibits the lipogenic ATP citrate lyase (ACL) enzyme [2,54,57,58,82-85]. Increased sugar production in the liver (neoglucogenesis) is one of the downstream results of that obstructive action (see Fig. 2).
And, another well-identified garcinia cambogia danger is that ...
Both animal and human experiments with ACL-disrupting HCA-garcinia supplementation found that the products significantly shift the metabolic machinery to the burning of fat (lipid oxidation), away from carbohydrate burning (glucose oxidation) [84,86-88] (see Fig. 2) –making garcinia extract a body fat burner or carb blocker, respectively.
Garcinia's fat burning property is biologically unsettling because fatty acid oxidation is metabolically less efficient and creates a bigger amount of damaging ROS products (e.g., lipid peroxides) in comparison to sugar oxidation (oxidative glucose disposal) [19,32,69].
A classic feature of metabolic irregularity in diabetes is diminished fuel efficiency, clinically evident in a shift from glucose oxidation to fat oxidation [29,60,67] (see Fig. 2). In fact, in diabetes, energy metabolism is not merely suboptimal but also deranged and dysfunctional [29,89].
Metabolic dysfunction (or the "metabolic syndrome") is at the bottom of many, if not all, chronic degenerative diseases, such as cancer, cardiovascular disease (CVD), diabetes, nonalcoholic fatty liver disease, and neurological brain diseases [28,60,68,90-92]. It has been increasingly recognized that heightened metabolic fat burning (fatty acid beta oxidation) is markedly linked to long-term complications of diabetes involving the cardiovascular system, such as the promotion of atherosclerosis [93,94].
The hyperlipidemia of diabetics is further reinforced or aggravated because the ACL/lipid-mediated metabolic dysfunction and destruction of beta cells conceivably lead to a pancreatic insulin deficiency because prolonged exposure to systemic free fatty acids in the blood reduces the gland's insulin yield and release  (see Fig. 2).
This relative insulin insufficiency:
The mobilization of (storage) fats into the blood as a consequence of pancreatic damage or from a high fat diet (of processed refined foods) triggers the release of insulin  which, resembling an acute adaptive reaction, obstructs lipolysis and attempts to recuperate glucose oxidation.
Yet, while a transient exposure of pancreatic beta cells to blood fats stimulates the secretion of insulin, their chronic exposure to lipids decreases insulin release [15,95,98,99] and can lead to chronic hyperglycemia  (see Fig. 2).
The state of a pancreatic insulin deficit seriously incapacitates, in a self-enforcing circle, the hormone's function to contain and regulate both fat and sugar content in the blood stream.
The excessive amounts of, or the extended exposure to, long-chain free fatty acids in the circulating blood, culminate in systemic insulin resistance and hyperinsulinemia (one of the symptoms of insulin resistance) because of the fats' destruction of insulin-binding cells in muscle, liver, and heart via increased inflammation and oxidative insults such as from lipid peroxidation [28,66,100-102] (see Fig. 2).
Insulin resistance itself worsens the diabetogenic situation, in what appears to be another vicious cycle, by signaling the release of free fatty acids (lipolysis) from lipid storage , exacerbating high blood fat content (hyperlipidemia) and tissue damage from deleterious products of oxidative fat burning.
Normally, insulin lowers the blood sugar concentration [11,80,104] and decreases mitochondrial fatty acid beta oxidation  (see Fig. 3). Once insulin resistance, hyperinsulinemia, and (hyperlipidemia/glucocorticoid-incited) hyperglycemia are pronounced as in advanced diabetes 2, insulin injections (insulin therapy) or diabetic drug management are increasingly ineffective in combating the "sugar disease" . In muscle cells of insulin-resistant diabetics, for example, insulin does not properly suppress fat metabolism compared to tissue of non-diabetic subjects .
Among the diabetes type 2 information published by the U.S. Center for Disease Control (CDC) it is brought up that in a lot of cases the loss of toes, feet, or legs because of diabetic neuropathy, or blindness because of diabetic retinopathy, or death because of strokes and heart attacks, are the end results of advanced diabetes .
"[...] that is part of what science is: proposing novel explanations from observed patterns in data, from which further work is done to substantiate or refute the initial findings." (David Quist, Mycologist, Environmental Scientist & GMO Whistleblower, in 2003)
How is diabetes treated? The traditional treatment for diabetes mellitus has been insulin therapy. How does insulin work, what is the function of insulin? The principal mode of action of human insulin therapy (i.e., insulin shots, other forms of insulin medication) is glucose control by way of the hormone's ability:
When blood insulin concentrations are high (hyperinsulinemia), which is routinely the case in diabetes (e.g., due to insulin resistance), lipids will compete with, and obstruct, glucose "for uptake by peripheral tissues", such as muscle tissue, despite a hyperinsulinemic and hyperglycemic state .
Yet, as described above, the primary garcinia cambogia side effects undermine, and actually help to neutralize, the major therapeutic actions of standard type 1 and type 2 diabetes treatment (i.e., conventional insulin therapy), such as the stoppage of gluconeogenesis and the promotion of glucose metabolism, enabling, sustaining, and driving a diabetic state (see Fig. 3).
Mark McCarty, a prolific biomedical researcher, brought out in one of his scientific study papers that:
"Disinhibition of hepatic fatty acid oxidation with hydroxycitrate (HCA) [...] in diabetics runs the risk of further enhancing excessive hepatic gluconeogenesis." 
“You can’t poison a crucial enzyme or block an important receptor
for the long-term and expect a good result.” (David Brownstein, MD
The enzyme "ATP citrate lyase" is critically involved in the body's production (de novo synthesis) of cholesterol and fat (lipogenesis, involving fatty acid synthesis and triglyceride synthesis) [3,82,84,106,107] (see Fig. 7). Observed results from biological interference of this ACL-mediated process by the use of garcinia cambogia weight loss pills are salient reductions in cholesterol and triglyceride levels [84,108,109].
As aforementioned, among the garcinia cambogia side effects is the suppression of the lipogenic enzyme ATP citric acid lyase by hydroxycitric acid (HCA), interfering with the production of the free form of cholesterol and fats, and optimal metabolic fuel utilization.
The freezing of internal cholesterol synthesis is a physiological worry and potentially dangerous because all vital steroid sex hormones (e.g., pregnenolone, DHEA, progesterone, testosterone), along with bile salts and vitamin D, are made up from this base substrate –namely, LDL cholesterol, the so-called "bad cholesterol" [3,26,110] (see Fig. 7).
(Statins, cholesterol-lowering drugs, are also known to suspend the production of other essential nutrients , such as co-enzyme Q10 (CoQ10, a.k.a ubiquinone); for more on that read my piece "Facts About Dietary Supplements: Supplement-Drug Interactions" –direct link to it at the end of this article under Recommended next pages. Since HCA-garcinia cambogia extract disrupts the enzymatic pathway of cholesterol synthesis further upstream from statins, it is quite conceivable that the diet supplement too decreases endogenous CoQ10 production –see Fig. 7.)
In terms of steroidogenesis and sexual function, statin therapy is linked to:
Further, the substantiated connection between statins and low testosterone has a corollary in the evolution of diabetes. Evidentiary data link a lack of testosterone to an elevated risk of diabetes.
For instance, animal experiments found that a male testosterone deficiency reduces the ability of pancreatic beta cells to secrete insulin upon stimulation by glucose, leading to glucose intolerance and hyperglycemia . Apparently, one of the benefits of testosterone is as a anti-diabetic hormone, and a low T profile fosters a predisposition to diabetes II (T2DM).
In humans, a testosterone insufficiency (a low testosterone condition) in type 2 diabetic men is associated with impaired mitochondrial function and increased inflammation (due to enhanced oxidative stress), leaving these patients more susceptible to cardiovascular malfunction .
Research data show that low testosterone levels (both total testosterone and "free testosterone") are significantly related to higher levels of C-reactive protein (CRP), a well-established marker of systemic inflammation [353,354]. In men, low T means more whole body inflammation (a configuration which could be driven or aggravated by adverse effects of statins –and, conceivably, garcinia cambogia side effects).
The low testosterone-high C-reactive protein link is one of several mechanisms of how statins can increase inflammation in the body (including in the pancreas) and is independent from the traditional cardiovascular risk factors. Moreover, some scientific evidence demonstrated an association, in men, between low T and high CRP with the metabolic syndrome or a greater diabetes risk [355-358], corroborating the notion that the disease is a low-grade inflammatory condition.
Furthermore, the real truth about cholesterol and statins reveals that the artificial lowering of cholesterol production through statin therapy (potentially leading to a cholesterol deficiency state) was linked to a significant increase in cancer, stroke risk, and higher mortality (including more suicides) which had been known since at least the 1970s [110-127,333,370].
In their book "How Statin Drugs Really Lower Cholesterol and Kill You One Cell at a Time" (2012) the authors stated that:
"Irrefutable, reproducible science proves statins are deadly and LDL cholesterol is vital to life." 
(Intriguing side-note: Niacin is a form of vitamin B3 [129,139]. High-dose niacin lowers cholesterol, an effect encountered with statin drug use. However, the intake of megadose niacin supplements over 10+ years resulted in practically the opposite findings in terms of "side effects" (that is, remarkable niacin benefits): a significant reduction in cancer and mortality, and a longer life [128,129]. Whereas the cholesterol-lowering "statins' side effects" are very deplorable, the cholesterol-lowering "niacin side effects" are very beneficial.
I suspect that the eminent discrepancy in outcomes might be because the impact of deadly statin drugs on cholesterol is (like with garcinia cambogia side effects) the result of blocking the synthesis of the substance (see Fig. 7), slashing free cholesterol levels, whereas niacin pills' curtailing effect on the essential substrate is the result of an energetically-induced acceleration of its conversion to steroid hormones (steroidogenesis), lowering cholesterol concentrations in its wake, because the vitamin niacin (a popular natural cholesterol remedy) is a key material for metabolites of oxidative respiration such as NAD (nicotinamide adenine dinucleotide) and NADH (nicotinamide adenine dinucleotide hydride, the chemically reduced biologically more "active" form of NAD, also known as coenzyme 1) .
Most of all, this indicates that how cholesterol numbers get reduced in the body is of decisive relevance.
Meaning, the biological-physiological mechanisms that lead to a sinkage of cholesterol values, for example, whether...
(a) through the shutdown of cholesterol production (with statin cholesterol meds, “natural statins” such as red yeast rice, or hydroxycitrate-laden garcinia cambogia extract supplements),
(b) through the resort to a cholesterol-lowering diet plan emphasizing high fiber foods (foods high in fiber help lowering cholesterol naturally by physically removing or “sweeping” cholesterol from the gut),
(c) through the use of vitamin C supplements (one of the benefits of vitamin C supplements is increased production of bile which sequesters cholesterol; as alluded to, both statins and GCE probably decrease bile synthesis),
(d) through the use of thyroid supplements (thyroid hormone activates the metabolic conversion of cholesterol to sex hormones, shrinking cholesterol levels in its wake), or
(e) through the use of niacin supplements
... determine if a particular method of lowering cholesterol is degenerative or rather regenerative.
Statins' inhibition of cholesterol biosynthesis (and one of the main garcinia cambogia side effects) results in a corrective-compensatory accumulation of intracellular (tissue) cholesterol levels via an "upregulation of LDL receptors for enhanced uptake of LDL-cholesterol" from blood plasma [111,130] (see Fig. 4).
The serious tampering with the body's creation of cholesterol appears to elevate inflammation in both the organs (cell tissue) and the blood stream. (Although, statins have, just as is the case with "advantageous" garcinia cambogia side effects, some anti-inflammatory properties too, such as through their blockade of cyclooxygenase –the COX enzyme (both the COX-1 and COX-2 variants)– which is responsible for the formation of prostanoids and prostaglandins.)
The clearance of cholesterol from the blood, as a result of upregulated flow of LDL cholesterol into cells, increases the plasma load of inflammatory endotoxins (bacterial lipopolysaccharides or LPS; basically, LPS are bacterial products of intestinal food digestion) because the majority of LPS is normally bound and sequestered by cholesterol in the blood, mitigating and restricting their detrimental activities (endotoxin toxicity) such as cytokine mobilization [131,333,336] (see Fig. 4).
Because LDL cholesterol (LDL-C), traditionally called the "bad cholesterol" , is very susceptible to oxidative attacks by reactive oxygen species (ROS), incurring free radical damage, the enhanced LDL cholesterol uptake by cells is theorized to increase the inflammatory burden (probably seriously exacerbated in part by the statin-induced reduction of certain antioxidants such as CoQ10, vitamin K, and selenium-containing glutathione peroxidase [115,360]) in the pancreatic beta islets –mediated by an excess of both oxidative stress and nitric oxide (NO), governed by interleukin-cytokine signaling [28,133,134]– resulting in pancreatic islets dysfunction, lowered insulin yield, and a rise in cell death (pancreatic apoptosis) [133,135-137] (see Fig. 4). (Also, the pro-inflammatory rebound effect of cholesterol-lowering interference could proffer, in part, a reasonable explanation why statins are associated with increased coronary-arterial calcification (atherosclerosis) , with the highest score of artery blockage in the group receiving high-intensity statin therapy [251,334] (see Fig. 8).)
HDL cholesterol, what had been coined "good cholesterol", protects against LDL cholesterol-induced beta-cell dysfunction and inflammation-induced apoptosis [130,138]. And, one of the purported health benefits of niacin supplements is that they elevate HDL cholesterol concentrations . Although, statin-incited boost in HDL cholesterol had been associated with an increased risk of cardiovascular disease .
These biological side effects from the inactivation of cholesterol bioproduction had been proposed to account for the elevated diabetes risk in connection with the intake of (certain) statin cholesterol meds (i.e., statin-induced new-onset diabetes mellitus) which stifle de-novo cholesterol synthesis [130,137], akin to garcinia cambogia side effects (see Fig. 7).
Garcinia cambogia-HCA has some anti-inflammatory action due to its bioflavonoid-polyphenol content [108,140]. Presumably, this counteracts or attenuates some of the manifold pro-oxidant, inflammatory ramifications induced by HCA-incited garcinia cambogia side effects, such as:
Apoptosis, by the way, is predominately a protective mechanism .
Programmed cell destruction, i.e., apoptosis, is a process essential to
growth, development, tissue homeostasis, and survival of the organism
. For instance, when normal cells get heavily or irreparably
damaged –as beta cells of the pancreas do by oxidative stress, for
example – or in cases of mitochondrial disorders , the
abnormal cells signal the initiation of their own demise (cell suicide),
as the mitotic replication of dysfunctional, damaged, or old cells
isn't constructive to the integrity and survival of the body system
If apoptosis is perpetually high in normal beta-cells, whereas the ratio of cell loss to new cell growth increases, the pancreas will have progressively less functional cells, manifested in beta-cell mass reduction, to express its vital physiological roles such as producing and secreting insulin, externalized in a loss of insulin output, resembling and defining the pathological configuration of type 1 diabetes (among the cardinal symptoms of diabetes type 1 is the loss of insulin production).
And, as stated before, a lack of insulin compromises the hormone's function to suppress (1) internal sugar production and (2) glycogen breakdown in the liver, allowing for blood glucose levels to rise excessively, thereby intensifying or contributing to hyperglycemia (high blood glucose levels)  (see Fig. 2 & 3).
NO-mediated pancreatic beta cell destruction (apoptosis) is the chief cause for the insulin dependency of type I diabetics . And the ACL enzyme is closely intertwined with cell apoptosis.
Normally, the concentration and activity of cytoplasmic ATP citrate lyase (ACL/ACLY/ATP-CL) is particularly high in healthy pancreatic beta cells –compared to other cell types– of both humans and animals [20,145,146], supporting cellular integrity and the proliferation of new cell growth (mitosis), and sustaining a healthy apoptosis index.
The overabundance of ACL viability in beta islets supports the data showing that beta cells represent "lipid synthesizing tissue" (fat storage)  rather than lipid consuming tissue (fat beta oxidation). (Among the leading garcinia cambogia side effects, hailed as beneficial weight loss actions, are the termination of fat storage and the shift to lipid oxidation, mediated through ACL inhibition (see Fig. 2).)
Low ATP citrate lyase status, independent from its association with dietary lipids, correlates with an augmentation of pancreatic islets cell death (apoptosis), and its up-regulation (overexpression) blocks the termination of pancreatic cells by free fatty acid combustion, underscoring the highly pivotal and protective role of ATP citrate lyase in pancreatic cell survival .
Fascinatingly, other normal human cells, such as lung cells, don't (readily) succumb to increased apoptosis in a ATP citrate lyase deficiency (ACL deficiency) state . I reckon that the higher apoptotic susceptibility of pancreatic beta cells in low cytosolic ATP citrate lyase conditions is directly related to their elevated risk of incurring oxidative-inflammatory injuries , facilitated by poor basal ATP formation  relative to most other cell types, a situation that fosters apoptosis despite a customarily high beta-cell content of apoptosis-shielding triglycerides .
In parallel to the augmented oxidative stress exposure from lipolysis and the choking of cholesterol generation via the HCA-laden garcinia cambogia extract-induced suppression of ATP citrate lyase, is a defective internal antioxidant defense system in certain people with advanced type I diabetes, worsening the situation synergistically in those individuals  (see Fig. 4).
In diabetic animals the level and activity of ATP citrate lyase in the liver and pancreas beta-cells is low, and a diet high in fat (or fasting) reduces the enzyme [151-153].
Analogously, the activity and concentration of ATP citrate lyase is typically and notably reduced in pancreatic islets beta cells of people with diabetes mellitus type 2 compared to non-diabetic individuals [20,146].
The predominant effect of HCA, the main "active" ingredient of garcinia cambogia diet supplements, is the inhibition of the ATP citrate lyase enzyme [2,82-85], a clinical feature that accelerates and aggravates apoptosis of normal beta cells –one of the most worrisome garcinia cambogia side effects, especially for diabetics or prediabetics.
"He who is afraid of asking is ashamed of learning." (Old Danish Proverb)
What is leptin? The traditional leptin definition identifies the substance as the so-called "satiety hormone" (leptin means thin) because leptin exerts a pivotal influence on food intake due to its central role in the regulation of metabolism and energy expenditure . Rare cases of human genetic mutations that result in a congenital deficiency of leptin were linked to severe obesity . Other research experiments in both humans and animals found that a lack of leptin protein, or its genomic substrate, the obese gene (OB gene) , causes massive obesity .
The leptin connection with diabetes is also supported by scientific data. Mice with a genetic defect in the leptin protein/gene are typically obese, inactive, diabetic, have a lower body temperature and energy metabolism .
Injections of the "fullness hormone" leptin into these mice caused:
Practically none of these observed alterations were noted in lean
controls that had been subjected to leptin injections [158,159].
Importantly, leptin is intricately implicated in both regeneration (health) and degeneration (disease) –depending mainly on its concentration, functionality, the duration to its exposure, the overall state of health of a person, and, conceivably, tissue localization.
Leptin, for instance, increases oxidative injury (free radical stress) because of its preference for metabolic burning of fat [160,161], demonstrated by higher amounts of markers of lipid peroxidation (e.g., isoprostanes) in the blood circulation and urinary excretion  (which may epitomize insulin resistance symptoms).
Conversely, a low leptin tone can, among other adverse effects, lead to immune deficiencies/compromised immune system (e.g., thymus gland shrinkage and lymph system degradation) and a poisoning of thyroid function [163-166]. As aforenoted, untreated patients with diabetes have a decreased blood concentration of the thyroid hormones T3 and T4 . This seems to support the sentiment that a leptin deficit exacerbates the diabetic thyroid dysfunction.
Leptin is predominantly derived from fat cells . What is the role of leptin? Evidently, one of its most prevalent, and arguably most important, functions and occurrences appears to be in the brain [154,167]. After all, glucose control, insulin release, and other prominent biological processes of diabetes are intimately linked to the brain-pancreas axis  (see Fig. 1).
Leptin has powerful neuroprotective effects: it fights inflammatory-oxidative insults in the central nervous system such as the brain, it guards the stability of the mitochondria, it protects against neural excitotoxicity, it upregulates defensive brain antioxidants, and it reduces cell apoptosis through the prevention of oxidative-excitotoxic attacks . A specific example of leptin benefits is the hormone's ability to vigorously protect brain cells from iron-induced damage .
As alluded to earlier, chronic inflammation and oxidative stress in the brain, leading to brain cell damage, are strongly associated with the onset and exacerbation of diabetes .
In addition, leptin has mighty protective effects on the mitochondrial integrity of pancreatic cells against various stressors  and it activates the mitotic growth of new insulin-secreting beta cell in the islets of Langerhans [169-171] (see Fig. 5). Although, while leptin activates insulin production, leptin inhibits insulin secretion into the blood stream because leptin and insulin have antagonistic effects . Among the classic characteristics or warning signs of diabetes is mitochondrial dysfunction which leptin therapy was able to restore in obese diabetic mice .
Apart from being an agent of beta-cell regeneration, another beneficial pancreatic effect of leptin is its prevention of the accumulation of fats in the insulin-secreting organ (and other body tissues) in instances of overeating (hyperphagia) because the hormone's deficiency or inadequate cellular utilization (leptin resistance) results in lipotoxicity (e.g., lipoapoptosis) of nonadipose tissues such as with the dysfunction or killing of beta cells in the pancreas [75,77].
Leptin's anti-diabetic action of lowering blood carbohydrate content and improving glucose metabolism (in muscles), via a raise in blood leptin content, had also been recorded [158,161,172,173], possibly by raising malonyl-CoA (malonyl coenzyme A)  and suppressing glucagon secretion , helping to forestall the induction of diabetic hyperglucagonemia (high blood glucagon levels)  (see Fig. 5).
A reciprocal homeostatic relationship seems to be at work between leptin and glucose because (increased) glucose metabolism or blood glucose (or insulin) content drives and turns on leptin secretion and augments the number of leptin receptors the hormone gets bound to (yet carbohydrates reduce plasma leptin which, I assume, is because of heightened leptin activation, increasing tissue-bound leptin content from a higher intracellular influx) [177-181].
In lean leptin-deficient mice with diabetes type 1 and hyperglycemia, the administration of leptin therapy, with high or low doses, significantly lowered blood glucose (and free fatty acid) levels in all the treated animals, prevented the catabolic state of cachexia (=wasting disease), diabetic ketoacidosis (an insulin deficit activates ketogenesis ), and death, restored hemoglobin A1c (HbA1c) back to normal, and markedly reduced food intake and induced weight loss (primarily body fat) . (HbA1c refers to glycated hemoglobin, a marker of glycemic control .)
However, leptin treatment in animals with tainted leptin signaling pathways and functionality in the central nervous system (e.g., the brain) failed to evoke several of these anti-obesity/anti-diabetic effects . Disturbed leptin function in the brain, leading to dysfunctional brain-body leptin signaling, may also explain why in obese humans with type 2 diabetes leptin replacement therapy, albeit raising blood leptin concentration, did not elicit a loss of weight or improve glycemic control .
Overweight or obese people frequently suffer from hyperleptinemia . Yet while the leptin status in the brain of obese individuals is marginally increased, their blood leptin values are extremely high compared to the former . Faulty leptin receptor functionality or signaling in the central nervous system, such as the brain, appear to account for the inconsistent clinical observations with leptin treatment .
Diabetic rodents have distinctly reduced blood plasma leptin levels . Rodent experiments found that HCA-garcinia cambogia extract lowered both insulin and serum leptin levels [186,187]. In statin-induced new-onset diabetes type 2, one of the proposed mechanisms for the depressed pancreatic insulin release and the stifling of beta cell functionality and proliferation, is the decrease in leptin concentration .
In terms of leptin side effects, an inhibitory action on leptin may be constructive in obese type 2 diabetics. Among the undesirable diabetes symptoms are cardiovascular events such as atherosclerosis . An elevated serum leptin prominence is associated with vascular dysfunction, heart attacks, and heart disease [189-191] which may be potential repercussions of intensified production of free radicals in vascular cells  because leptin privileges the metabolic combustion of fat [160,161] and high blood leptin content, as in hyperleptinemia, leads to increased oxidative insults intracellularly . Leptin, for instance, is positively associated with the hardening of arteries (atherosclerosis) and blood platelet aggregation [191,194].
Yet, other studies found that the negative correlation between leptin concentration and vascular function disappeared after adjusting for obesity, body mass index (BMI), or hyperinsulinemia [195,196]. Indeed, an ex vivo study reported "better" vascular function in overweight human diabetics with higher leptin levels, independent of BMI, obesity, or insulin status . Nevertheless, body fat mass does positively correlate with blood leptin levels , presumably because fat cells manufacture the hormone.
Is the correlation of high blood plasma leptin and cardiovascular and coronary heart disease perhaps a downstream ramification of a dysfunctional leptin-mediated brain-body constellation? In animal vascular ischemia, a symptomatology of a potential impeding heart attack, the leptin functionality in the brain is impaired . The dysfunction in neuronal leptin signaling is thought to cause hyperleptinemia (high blood leptin levels) [199,200].
Leptin stimulates lipolysis in white fat tissue via nitric oxide activation [201,202]. Although in obesity, the leptin-NO (nitric oxide) mechanism seems to be broken  –perhaps, this might also be the case in diabetes 2. Among garcinia cambogia side effects is the aforecited repressive action on leptin, thus the diet supplement may emanate some beneficial anti-lipolytic activity, concurrent with its pro-inflammatory, pro-lipolytic action (from its selective championing of fatty acid oxidation and its prohibiting action on insulin production via ACL disruption –see Fig. 2).
Leptin, like a garcinia cambogia supplement (i.e., GCE), promotes fat oxidation, displacing tissue glucose metabolism [160,161]. But while GCE-HCA nutritional supplements target the release and combustion of white fat , which is abundant in the viscera and the abdomen ("belly fat"), leptin appears to mostly stimulate the burning of brown fat, located preferentially in the upper region of the body, especially the neck area, via adaptive thermogenesis characterized by the hormone's capability to marshal the transformation of white fat to brown fat for fuel combustion (the "browning reaction") [209,213] depending on the unique situational context, generating oxidation energy, in response to –for example– prolonged exposure to metabolic stressors [204-209]. (The topical overabundance of brown fat mass around the central nervous system, the brain, and the heart –and, perhaps, that it is more prevalent in children than adults – seems to indicate the supreme physiological-evolutionary importance of this category of fat and brown fat thermogenesis.)
Also, brown adipose tissue (BAT, colloquially known as brown fat), and beige fat are primarily designated for dynamic adaptive energy expenditure (or heat production), used for such situations as thermoregulation in cold environments , compared to white fat (white adipose tissue or WAT) that is aimed mainly at energy storage [209,211-215].
The BAT-recruiting property of both leptin and insulin, mediated by activation of the brain's hypothalamus , is responsible for increased metabolism and body temperature.
The dynamic energy-mobilizing capacity and role of brown fatty acids is highlighted by the following:
Whereas glucose combustion bears the most metabolic efficacy, producing ATP [29,97,220], the oxidation of brown fat (BAT thermogenesis) produces little chemical energy in the form of ATP but blows off chemical energy in the form of heat [209,211,212,221].
The disposal of (excess) body energy, via the calorie-burning capacity of functional BAT-combustion, helps to prevent and quench metabolic disorders (induced by, for example, high-fat diets or lipolysis) such as obesity and diabetes [211,212,221-224].
Exposure to cold temperatures, raising brown fat weight and cytochrome oxidase activity (and, thus, the rate of cell respiration) to an extreme degree, was reported to ameliorate and reverse the diabetogenic effects (e.g., insulin resistance) of eating large amounts of (highly processed) fatty food, by raising insulin sensitivity (how easily and properly tissues detect the insulin signal) and improving glucose tolerance .
It needs to be kept in mind that in thermoneutral environments where brown fat burning isn't recruited to elevate the basal metabolic rate in order to maintain body temperature, the anti-obesity effect of heat-generating brown fat thermogenesis dissipates . On the other hand, activated thermal beige and brown fatty acid oxidation was reported to decline in proportion to increasing excess weight (obesity) [215,226,227].
The more abundant functional brown fat reservoirs are in a person, the higher is the basal rate of metabolic respiration  –dispensing surplus metabolic energy at an increased rate relatively independent of the person's unique situational context.
When brown fat oxidation (BAT oxidative metabolism) is switched on, the tissue repository consumes about as much glucose as the brain , although the fat tissue still uses mostly lipid fuel molecules as its main fuel source . For instance, in muscle cells, leptin also increases oxidative glucose disposal in addition to primarily invoking fat metabolism  (see Fig. 5).
Efficient brown fat combustion reduces free radical damage and modulates inflammation  and, thus, is a potential mechanism responsible for leptin's and insulin's impressive brain benefits, protecting the integrity of neurons, due to these two hormones' central role in brown fat thermogenesis, promoting the hypothalamus-mediated white-to-brown fat transformation (the "browning reaction")  and brown fat tissue distribution around the central nervous system (CNS). A deficit of leptin, therefore, is arguably spoiling the organism's efficacy to convert WAT to BAT (meaning it has a retarding impact on the "browning reaction"), slowing down the rate of a safer form of metabolic fat burning (i.e., brown fat thermogenesis).
Garcinia cambogia supplement's dampening effect on leptin and insulin [186-188] might attenuate or, perhaps, abolish the diet nutritional supplement's observed inflammation-reducing property in the brain.
And, there is a link between insulin and leptin. Brown fat, which is activated by leptin (among other agents), plays a role in insulin secretion. And insulin regulates cell metabolism in both white and brown fat tissue . Insulin, for example, summons brown fat thermogenesis by raising glucose oxidation ("glucose burning") , and triggering WAT browning . In animal tests insulin dysfunction in brown fat cells (BAT) was correlated with defective insulin secretion from pancreatic beta cells .
In terms of leptin and appetite, the leptin hormone has powerful effects on the taste organ, especially in regard to foods with a sweet taste, acting as an all natural appetite suppressant (which prompted some individuals or organizations to recommend "leptin foods" or a "leptin diet" to combat the obesity epidemic). Experiments uncovered that leptin, via the hypothalamus, thwarts taste cell responses to sweet substances such as sugar (sucrose), curbing food cravings for sweets and modulating gluttony [231-233].
Further scientific backing of the idea to contemplate leptin for weight loss is that another leptin-cued mechanism of controlling feelings of hunger or food intake is the hormone's capability to raise the important metabolic intermediate malonyl-CoA (in the brain's hypothalamus), a coenzyme that had been called a "signal of plenty" , the deficiency of which is decidedly linked to an increase in appetite . Accordingly, hydroxycitrate's dimming of malonyl-CoA levels increases appetite  (see Fig. 5).
Apart from lowering leptin, among garcinia cambogia side effects is the interference with malonyl-CoA synthesis (see Fig. 6), diminishing its production (thus, we have at least two physiologically accounted processes that oppose and diverge from the consistent marketing-"research" meme that garcinia cambogia extract is a natural appetite suppressant).
Here are more research data on the adverse side effects of garcinia cambogia by way of tampering with malonyl-CoA...
"Impaired or insufficient insulin secretion results in diabetes mellitus." (Diabetes Researchers Patrik Rorsman, PhD & Matthias Braun, PhD, MD )
As mentioned earlier, HCA-concentrated garcinia cambogia diet pills disrupt triglyceride and cholesterol production and interfere with the most adept process of oxidative mitochondrial respiration (i.e., glucose combustion) of (pancreatic) cells via the interruption of ATP citrate lyase [3,84,107].
How exactly do garcinia cambogia side effects downregulate cellular energy metabolism and disrupt insulin release?
Citrate (a product of citric acid) is the substrate for, or the precursor of, malonyl-CoA (malonyl-coenzyme A), a key extra-mitochondrial substance of, ultimately, mitochondrial oxidative metabolism (oxidative phosphorylation) . The master enzyme required for the conversion of citrate to malonyl-CoA is ATP-citrate lyase  –the very cytoplasmic enzyme that is downregulated by HCA (and certain essential fatty acids and saturated fatty acids [20,71,78]). More specifically, ATP citrate lyase is the constituent of the next-to-last enzymatic step in the chemical transformation of citrate-to-Acetyl CoA-to-malonyl CoA (after citrate exits the mitochondrial Krebs cycle/citric acid cycle, i.e., mitochondrial oxidation) of cellular energy metabolism [97,237,244] (see Fig. 6). (This is further corroborated by research information showing that hydroxycitrate doesn't appear to disrupt citrate synthesis but lowers the malonyl-CoA tissue levels ).
Unsurprisingly, garcinia cambogia-hydroxycitric acid weight loss supplements lower malony-CoA [97,174,236,237]. And, the inhibition of malonyl-CoA production (such as with garcinia cambogia supplements) reduces glucose-induced insulin release  (see Fig. 6).
A chief role of malonyl-CoA is the prevention of entry of fats from the cell's cytoplasm into the cell's mitochondrion, to be used as a metabolic fuel (fatty acid oxidation or beta oxidation) [237,238,338].
A low malonyl-CoA status activates the transport of long-chain fatty acids for metabolic fat disposal into the cell's mitochondrium [68,96,97], whereas a high level of malonyl-CoA obstructs blood fats from getting used as a metabolic fuel by the cells' mitochondria [97,234,239,338].
Hence, the garcinia-hydroxycitric acid supplement increases oxidative fat metabolism by downregulating the citrate to malonyl-CoA conversion, induced through the inhibition of the cytoplasmic ATP citrate lyase enzyme by the "breakthrough" weight loss pill [57,97] (see Fig. 6).
Malonyl-CoA is synthesized from both lipids and glucose [234,237]. Glucose or high blood sugar levels propel the production of citrate, ATP citrate lyase, and malonyl-CoA [50,71,81,240,337,338]. (In diabetes mellitus type 2 patients citrate production appears to be also poisoned because citrate synthase activity, responsible for citrate synthesis, is reduced  despite the common simultaneous existence of fasting hyperglycemia (high fasting blood glucose level) with the disease, indicative of systemic metabolic derangement of respiratory capacity.)
The observation of suboptimal citrate synthesis in diabetics, producing smaller pools of citrate, and the subsequent additional impairment of the synthesis of malonyl-CoA (from a pre-existing diminished condensation of citrate) by way of garcinia cambogia extract intake, amounts to adding insult to injury (see Fig. 6).
Because both glucose and insulin upregulate the production of ATP citric acid lyase and malonyl-CoA, the simple carbohydrate and insulin aid in shifting free fatty acid oxidation back to glucose metabolism via the suppression of a carnitine pathway [50,68,97,98,237,321,338]. (These physiological principles, discovered in 1977, form the basis for the concept of the reciprocal "Randle cycle" (the "Glucose-Fatty Acid Cycle") [50,240].)
A high malonyl-CoA value is also closely associated with reduced appetite and physical leanness, whereas its increasing deficiency or total lack ensue in weight gain or obesity  (see Fig. 6).
Incidentally, the inactivation of the cytosolic ATP citrate lyase enzyme (with garcinia cambogia-HCA diet products) leads to both a reduction of triglycerides (fat production) and the activation of beta oxidation (fatty acid burning) via the obstruction of malonyl-CoA synthesis because that coenzyme regulates both fat production and fat burning [97,237] (see Fig. 6).
A dysregulation of malonyl-CoA metabolism and increased oxidative fatty acid disposal (beta oxidation) are firmly implicated with insulin resistance [32,34,68].
Some data indicated that the combination of metabolically functional glucose utilization and adequate leptin content (which, as already stated, are both downregulated by the suppression of ATP citrate lyase) elevates the synthesis of malonyl-CoA more than do the individual parameters alone . Oxidative glucose viability appears to be an essential requirement for leptin to increase (hypothalamic) malonyl-CoA levels .
In regard to blood glucose levels in diabetes and in people without the disease, one of the main functions of insulin is to lower, or balance, high blood sugar values [11,47,80]. Insulin accomplishes this by enabling and supporting the preferential burning of glucose as the metabolic fuel material instead of fat [50,60] and the strangling of hepatic sugar production  (see Fig. 3).
Insulin release, from glucose stimulation, stymies body fat burning (free fatty acid oxidation), fat store mobilization (lipolysis), and it increases triglyceride synthesis [19,38,60,97] (see Fig. 3). Pancreatic beta cells normally contain high levels of triglycerides, protecting them against oxidative DNA damage-mediated apoptosis induced by free fatty acids [149,242].
Research data [3,81,98,99,129,235,239,337,338] found that insulin secretion is triggered and stimulated by:
One of the principal mechanisms allowing proper insulin secretion is a high aerobic metabolism –or an "acceleration of the metabolic flux"– , and, as already described, the most efficient fuel to accomplish that is glucose [29,97,220].
However, as explained, the use of HCA-saturated garcinia cambogia extract promotes fat burning [50,96,97,238,239] instead of metabolizing glucose, the most usable fuel substrate to increase total cellular respiration , requiring less oxygen [19,29] to generate cellular energy in the form of adenosine triphosphate (ATP) .
With functional sugar metabolism, the increased shuttling of glucose (in place of fatty acids) into the mitochondria augments the production of citrate and other metabolic intermediates such as malonyl-CoA [50,81,338], stimulating insulin release . A decline in glucose-stimulated cytosolic citrate production reduces glucose-stimulated insulin secretion . (Reiterating because of its importance and ease of understanding, the synthesis of malonyl-CoA from citrate is tainted by one of the main garcinia cambogia side effects, the suppression of ATP citrate lyase.)
Hence, the burning of sugar (glucose) appears to be pivotal for physiologically-sufficient insulin secretion from the pancreas. Garcinia cambogia side effects derail that biological process.
It is well-established that insulin secretion, in turn, inhibits fatty acid beta oxidation and incites the generation of malonyl-CoA, at least in muscle and liver cells [50,239,243]. In the diabetic state, with defective inadequate insulin synthesis or release from the pancreas, and high blood fat content (hyperlipidemia), the concentration of malonyl-CoA in the liver drops .
In skeletal muscle tissue of insulin-resistant type II diabetes patients, however, the content of malonyl coenzyme A is elevated and metabolic fat catabolism reduced –yet fatty acid oxidation remains higher and glucose oxidation lower compared to non-diabetic individuals without insulin-resistant muscle tissue .
The exposure to a glucose-mediated insulin load usually deters metabolic fatty acid beta oxidation but the reduced sensitivity of muscle cells to insulin exposure in cases of diabetic insulin resistance impairs and reduces the elevation of malonyl-CoA, and the chemical's subsequent functions to (1) inhibit respiratory fat burning and (2) to stimulate metabolic sugar disposal, respectively .
And as laid out earlier, one of the other prominent garcinia cambogia side effects –the obstruction of cholesterol synthesis– also leads to the dysfunction of the pancreas (see Fig. 4). Research evidence described how the inhibition of the synthesis of cholesterol in pancreatic beta cells ensues in a blockage, thus reduction, of insulin secretion [245,246].
In a mice study garcinia cambogia extract was observed to lower the level of insulin compared to the placebo group . An experiment with HCA-garcinia cambogia extract in rats did notice a decrease in fasting insulin concentration (but without signs of development of insulin resistance) in the active study group compared to the untreated animals . A trial with a garcinia cambogia extract in obese women, however, did not observe any notable fluctuation in their insulin levels over the control subjects .
Other investigative data attest to insulin-involving diabetogenic garcina cambogia side effects. Research evidence found that hydroxycitric acid (HCA) profoundly inhibits insulin release from beta cells in the pancreas [88,244,247]. This was corroborated by experimental findings demonstrating that decreased levels of ATP citrate lyase, the key enzyme which is crippled by HCA-garcinia cambogia extract, significantly reduced glucose consumption [86,248] (whereas HCA-garcinia cambogia extract boosts glycogen production (gluconeogenesis) [86,88]). And, an insulin deficit (as already explained) triggers gluconeogenesis [45-47,51] (see Fig. 2).
This means that a suppressed generation of malonyl-CoA and insulin secretion (induced, for example, by garcinia food supplements because these two adverse reactions are well-recorded garcinia cambogia side effects) probably nurtures the existing diabetic condition of high plasma glucose concentration by the shift in source of metabolic energy from sugar to fat [32,96,237,243], leading to hyperglycemia in a mutually-enforcing cycle in which cellular glucose usage is inhibited, insulin secretion constrained, and (accelerated) hepatic glucose synthesis (gluconeogenesis) is turned on.
In a research study on cellular fat uptake and oxidation, and insulin resistance, the authors opined that:
"[...] decreasing muscle fatty acid uptake can improve insulin sensitivity." 
The longtime diabetes scientists Josephine M. Forbes and Mark E. Cooper denoted in a study paper that:
"Abnormalities in energy production are thought to be major contributors to the development of diabetic complications." 
Other diabetes investigators commented that the biological disruption of enzymatic metabolic pathways by garcinia cambogia-derived hydroxcitrate...
"[...] is likely to have some effect on insulin sensitivity that can lead to type-2 diabetes [...]."  [emphasis added]
I saw that a fairly popular garcinia cambogia website, marketing and selling the diet supplement, had listed this study reference  on their site (for a total of only three cited study references on the entire sales page/website) supposedly favorable to the use of garcinia cambogia supplements ("it supports healthy cholesterol levels"). Yet, nowhere on that sales-oriented garcinia cambogia website is the reader of it ever told of this troubling statement by the study authors –or that the suppression of cholesterol synthesis, lowering LDL-C levels, hinders insulin release. Garcinia cambogia side effects are ignored while purported garcinia cambogia benefits are accentuated.
It is also worth noting that the merchants of the traditional medical profession routinely resort to the same type of specious argumentation and claims allegedly in favor of their highly profitable medical merchandise, using pathological markers of disease as references of benefit, in order to justify the mass use of their medical products and interventions (e.g., "statins lower cholesterol levels").
As Joel Kauffman (1937-2015), PhD, put it in his exposé "Malignant Medical Myths" (2006):
"[...] medical providers, and the public are easily fooled by the effect of drugs on some easily measured symptom whose significance has reached the level of folklore (myth). Many interventions are justified on conveniently measured parameters, such as bone density, cholesterol level, EKGs, and blood pressure."  [emphasis added]
Symptom manipulation is proof of therapeutic benefit or a "cure" according to disease-focused consensus medicine which in reality more often than not plays out as the ongoing management of disease (although in certain cases this might be the most feasible option). The spotlight on the manipulation of disease symptoms (markers of disease) with therapeutic regimes is a traditional trait of organized medicine. (I've written also about this topic in my article "Tougher Supplement Regulation: A Necessity Or Politics?" –direct link to it at the end of this article under Recommended next page(s).)
The purported cardiovascular health benefits of statin drugs are said to rest on their cholesterol-lowering effect –an "easily measured symptom, called the surrogate endpoint" . A surrogate marker is a measured substitute that is assumed to be associated with a specific outcome. As an example, the idea that a high cholesterol level increases the odds of a heart attack and death (the cholesterol-and-heart attack theory).
So, the alleged immense cholesterol benefits of statins are deducted from the manipulation of a marker or symptom of disease (i.e., a high cholesterol reading), via the poisoning of cholesterol biosynthesis, while, in actuality, these cholesterol-lowering medicines were found to have a "98% clinical failure rate" and increase morbidity and mortality [110-124,126,127,333,344].
The same pseudo-science or medical quackery, which the traditional medical officialdom calls "evidence-based medicine" (EBM), is at work with formally sanctioned cancer drugs based on precepts of that bogus science model. Two out of three cancer drugs authorized by the US government between 2008 and 2012 received approval on the basis of surrogate endpoints . After several years of follow-up no tangible benefit (i.e., longer survival) was recorded for more than 85% of the surrogate endpoint-based medications .
Diabetes drugs are developed and approved because they lower blood sugar levels (according to many, sugar is the purported "cause of diabetes") without a clear science-based understanding of the medications' systemic physiological effects in the body . The glucose-lowering effect of some of the most widely used and "safety"-approved diabetes medications, such as Avandia (rosiglitazone), Orinase (tolbutamide), or Actos (pioglitazone), were shown to increase heart failure, myocardial infarction (=heart attack), cardiovascular mortality, and bladder cancer .
In a study paper by German researchers who compared the marketing literature for therapeutic products versus the scientific literature in alleged support of the interventions, they wrote:
"If study citations can be found in the promotional material, the selection of references is usually limited to those studies that offer at least some indications or aspects in favor of the advertised product."  [original article in German: translation & emphasis mine]
In their writeup on garcinia cambogia side effects, another marketing site of the natural weight loss product stated regarding the use of these "natural" nutritional supplements that, "If there’s anyone who would greatly benefit from this, diabetics will be it" despite the concurrent admissions in the article's content that "the results linking diabetes and garcinia cambogia remain inconclusive" and "diabetics are highly advised to take the diet supplement with caution".
"The higher the interest of the establishment, the lower our
interest. The more the authorities recommend something, the greater our
health is at risk." (Ghislaine Lanctôt, MD, in "The Medical Mafia", 2002
For many years, statin drugs have been among the most recommended, the most extensively used, the most heavily marketed, and the most lucrative medical products on the planet [110,111,251].
The statin medication Lipitor (atorvastatin) had reached the status of "the world’s best-selling drug" . Statin cholesterol drugs have attain the accolade of "the most prescribed pharmaceuticals in history" . The statin industry earns 20 billion dollars in annual revenues as of 2013 . In 2015, many millions of healthy people worldwide continue to take cholesterol-lowering statin drugs , such as Zocor and Lipitor statins.
Yet, it had been well-established that (at least some) statins, the biggest moneymakers in the history of the medico-pharma business, notably increase the risk of diabetes mellitus (this includes a link between atorvastatin/Lipitor and diabetes) [111,124,137,251-260,341-343,365-367].
The statin-diabetes link is true for both:
As an example of the latter, one such study, examining the notion of “statins for primary prevention”, reported a doubling of the diabetes risk (plus typical complications with diabetes) in healthy statin users without experiencing offsetting cardiovascular benefits .
The unscrupulous allopathic medical industrial complex, of course, has been trying to tap into the vast profit market of healthy people with the use of verified toxic statins [124,368,369] –justified on the entirely dogmatic, scientifically unfounded claim of “primary prevention” of disease (e.g., the primary and secondary prevention of coronary artery disease ) with hyped up claims such as “statins are the best life insurance against atherosclerotic events”  (based on the fallacious cholesterol theory of heart disease [251,368,369]).
The just cited statins-diabetes study  which negated the medical dogma of primary disease prevention with statin drugs showed, in essence, that statins do much more harm than good in healthy people (i.e., statins cause diabetes and proffer marginal or zero benefits). Basically, that is nothing else but to seriously poison and damage unsuspecting healthy people.
The US Food and Drug Administration (FDA), by the way, belatedly alerted the public about the highly noteworthy statin-diabetes association in early 2012  after pertinent scientific study findings of potential diabetogenic activities of statins had already been published back in 2004 . In 2012 the federal agency decided to make the addition to statin drug labels that these medications can cause diabetes .
Nonetheless, all of the disturbing relevant evidence on the statin-diabetes link hasn't stopped the Canadian Diabetes Association (CDA) from recommending in their 2013 diabetes guidelines that all patients with diabetes, age 40 and above, take statins [263,264], claiming that with statins "there is little safety concern for their long-term use" . Other authoritative diabetes organizations did not stray far from such advice, as the American Diabetes Association's guidelines, had advocated very similar statin recommendations for diabetics. The FDA, too, had issued encouraging statin use propositions in their statin-diabetes type 2 information releases (despite of its 2012 announcement that statins are causing diabetes) because of the drugs' alleged heart benefits ("FDA continues to believe that the cardiovascular benefits of statins outweigh these small increased risks." ).
The medical Powers-That-Be primarily justify statin therapy in terms of vasculo-protective effects, such as the prevention of non-fatal myocardial infarctions and coronary artery disease (clogging of arteries/clogged arteries or atherosclerosis), supposedly because of its cholesterol-reducing property.
Yet, while diabetes is associated with a higher risk of developing cardiovascular disease (CVD), long-time independent statin drugs and cholesterol researcher Uffe Ravnskov, MD, PhD, author of many scientific papers and books exposing false statin and cholesterol beliefs (e.g., the cholesterol myth that "cholesterol causes heart disease"), documented the various study data validating that high cholesterol (hypercholesterolemia), specifically high serum LDL cholesterol, isn't a risk factor for heart disease in diabetic patients .
A similar account was voiced by Dwight Lundell, MD, a former heart surgeon, back in 2012:
"I trained for many years with other prominent physicians labelled “opinion makers.” Bombarded with scientific literature, continually attending education seminars, we opinion makers insisted heart disease resulted from the simple fact of elevated blood cholesterol. The only accepted therapy was prescribing medications to lower cholesterol and a diet that severely restricted fat intake. [...]. It Is Not Working! These recommendations are no longer scientifically or morally defensible." 
As aforementioned, both garcinia cambogia extract supplements and statin drugs disrupt endogenous cholesterol synthesis, triglyceride production, and lower leptin levels.
(Both statins and garcinia cambogia side effects on cholesterol production are initiated enzymatically. Statin cholesterol medicines disable the enzyme HMG-CoA reductase , garcinia cambogia extract debilitates the enzyme ATP citrate lyase. The suffocation of these enzymes leads to reduced levels of essential substrates for the internal production of the free form of cholesterol, mevalonate in the case of statins [115,120] and acetyl-CoA in the case of garcinia cambogia extract . By the way, acetyl-CoA is part of the material that gets converted to HMG-CoA reductase (along the mevalonate pathway), so GCE interrupts cholesterol biosynthesis further upstream in the cholesterol pathway than statins (see Fig. 7).)
The intake of these two agents, statins and garcinia cambogia extract, causing the unhinging of cholesterol production, seems particularly ill-advised and highly dangerous in diabetics because:
The threat of diabetes 2 from the corruption of cholesterol synthesis, via statin or garcinia cambogia side effects, might be higher in women because animal experiments found that pharmacological amounts of estrogen (specifically estradiol) activates the LDL receptors in the liver, increasing intracellular LDL cholesterol uptake (see Fig. 4), leading to blood hypocholesterolemia (notably increased mortality was the adverse outcome after the induction of a low serum cholesterol state) . So-called natural hormone replacement therapy with estrogens has long been strongly associated with heart disease, breast cancer, and other morbidities in women . Some human data (e.g., a subanalysis of the JUPITER study  using rosuvastatin, brand name "Crestor") corroborate a significantly increased gender-specific risk of developing full-blown diabetes with statin drug therapy [127,265,267].
Plasma cholesterol's capability to sequester and neutralize endotoxins (LPS) from the gut microbiota, and numerous toxicants (e.g., carcinogenic chemicals) and injurious agents (e.g., noxious microbes) makes the substance an essential agent of detoxification and important immune system modulator, protecting the body, and especially the brain, from harmful poisons and inflammatory attacks [125,127,268,333,336] (see Fig. 4).
Diminished levels of blood LDL cholesterol are linked to a higher incidence of viral infections, respiratory disease, liver disease, and cancer [127,333,340]. LPS (endotoxins) are associated with considerable genomic damage (i.e., DNA strand breaks) . Pneumonia rates are higher in people who received statin therapy compared to untreated controls . An observational study found that Type 2 diabetics who are on statins and got admitted to a hospital for Covid-19 coronavirus respiratory disease had a significantly higher mortality rate compared to those not taking statin medications .
Nefariously, it appears that statin drugs actually increase the risk of infection in a hybrid highly self-serving sequence:
The significance and clinical observation that statins are linked to a
variety of inflammation-mediated autoimmune diseases (e.g., chronic fatigue
syndrome, arthritis, multiple sclerosis)  should hardly come as a
surprise but should be a logical expectation.
Conceivably, the increase of the body's exposure to toxicity (promoting, for instance, liver inflammation) by the destabilization of the endotoxin-cholesterol axis induced via cholesterol-altering statins or garcinia cambogia side effects, is probably magnified by the potential simultaneous reduction in the synthesis of bile salt, a very cholesterol-rich material that serves as an integral agent of detoxification (see Fig. 4, 7 & 8).
These biological mechanisms (i.e., these specific ramifications of adverse garcinia cambogia side effects) could reasonably account for, at least as contributing factors, the past cases of liver injury that were linked to, for example, the Hydroxycut brand of garcinia cambogia slimming products –above and beyond of explanations that put the blame on issues of product contamination. A more current case of severe liver damage that has been linked to a non-Hydroxycut garcinia cambogia brand is recorded in the medical literature. It is the case of a woman who after consuming the supposedly "safe" weight reduction supplement for a few weeks came down with acute hepatitis and, subsequently, acute liver failure (that ultimately required a liver transplantation), pathologies which evidently were traced to garcinia cambogia side effects .
By the way, akin to toxic garcinia cambogia side effects concerning the liver, damage to this organ is also among the scientifically confirmed, serious adverse statin side effects [111,251], indicative of the physiological proximity of metabolic action of the two agents and their overlapping biological profiles.
In close relationship to the diabetic metabolic syndrome, LPS are capable to produce metabolic endotoxemia, a condition hallmarked by low-grade inflammation (engaging apoptotic events) that can lead to a reduction in insulin secretion and insulin resistance, and atherosclerosis [322,323,336] (signifying another mechanism to promote atherosclerotic development besides through the repercussions of the augmentation of LDL cholesterol content inside tissues, as seen with statins [discussed earlier]). People with type 2 diabetes mellitus carry a much larger LPS load in their blood than healthy people . A high-fat diet (of refined foods high in fats) chronically and strongly augments the plasma endotoxin content [322,323,336] (see Fig. 8).
Because the development or causes of diabetes mellitus are strongly associated with inflammatory damage from stressors (see the section "The Principal Clinical Features Of Diabetes", particularly Fig. 1), such as various types of toxins and noxious agents (encompasses diet-based omega-3 side effects), the inhibition of cholesterol biogeneration, whether by garcinia cambogia weight loss pills or statins (see Fig. 7), kindles the development of the metabolic disease called "diabetes".
The essentiality of cholesterol in the brain is further demonstrated by the fact that the organ contains the highest cholesterol concentration (around 25%) of any tissue in the human body [125,265] and that the material is indispensable in the formation of functional synapses [265,270].
A short-term human study (lasting 10 weeks) with garcinia cambogia extract supplements failed to record a cholesterol-depressing effect of the product in terms of plasma total cholesterol . In an animal study of similar short duration (12 weeks), however, it was observed that the administration of HCA-garcinia cambogia diet pills significantly lowered blood cholesterol (and triglyceride) levels compared to the control group . A 12-week long human trial using garcinia supplements combined with a fiber-rich botanical also found that the concentrations of total cholesterol and LDL cholesterol were significantly reduced in comparison to the placebo arm . And, the human consumption of nutritional supplements of HCA garcinia cambogia extract, not combined with other diet products, over 8 weeks –using a decidedly higher dosage (although deemed "safe for human consumption" ) of the active GCE ingredient hydroxycitric acid (i.e., 2,800 mg/day of HCA ) than in the experiment of the Kim team )– was shown to strikingly decrease total blood cholesterol content, LDL cholesterol, and triglyceride levels [84,274].
As alluded to earlier, the decline in the secretion of insulin (found among both statin and garcinia cambogia side effects) is postulated to be a consequence of increased pro-inflammatory and oxidative effects on ß-cells from an amplified intracellular inflow of blood-derived LDL cholesterol, all of which is an outcome of the hampering with cholesterol production.
Remember that another related possible mechanism that had been proposed of why the strangulation of internal cholesterol biosynthesis is dangerous and can contribute to or cause diabetes centers around the fact that cholesterol is a required substance for proper beta cell function, and that the disruption of endogenous cholesterol genesis in beta-cells ensues in a noticeable reduction of insulin secretion from pancreatic islets  (see Fig. 4).
The dangers of statin drugs have many people motivated to seek out natural cholesterol remedies or "natural statins" for high cholesterol levels. A popular statin alternative is Chinese red yeast rice (sometimes mistakenly referred to as red rice yeast). Red yeast rice contains naturally occurring statins [117,324,327,330].
However, these natural statins in red yeast rice supplements:
(A) don't typically reach the pharmacological dosage level of commonly prescribed statin drugs, and
(B) red yeast rice supplements consist of numerous cardio-beneficial nutrients (e.g., coenzyme Q10),
thus, red yeast rice therapy appears notably less dangerous –or quite safe– compared to statin medicines yet probably ought to remain a real concern because...
(1) the natural health product does significantly reduce both total cholesterol and LDL cholesterol levels,
(2) inhibits cholesterol production in the liver,
(3) has been tied to known statins' side effects (e.g., neuropathy, myopathy, rhabdomyolysis),
(4) hasn't been rigorously studied in controlled long-term trials, and
(5) because serious statin side effects can come about over time even at a low dosage (e.g., low-dose statin therapy, lasting more than 5 years, was associated with much more cancer deaths) [324-330,333] (see Fig. 8).
After all, all statins are toxins made by fungi –and yeast is a fungus. (All statin drugs are known disease-causing mold poisons (fungal toxins, a.k.a. mycotoxins) .)
Moreover, and in view of that in diabetes sugar levels are high as a rule, statin cholesterol drugs, just like HCA-garcinia cambogia extracts, block insulin secretion from the pancreas (by disrupting and damaging beta cell function) and block cellular glucose uptake (i.e., glucose transport via Glut proteins), resulting in hyperglycemia [137,239,251,253,275,276] (see Fig. 4 & 8). In their lengthy biomedical paper on conventional cholesterol treatment, the authors commented that one of the ways statins cause an increase in the incidence of diabetes is by "decreasing glucose consumption"  –one of the well-described garcinia cambogia side effects.
In addition, cholesterol researcher Uffe Ravnskov, MD, PhD, had illustrated the life-saving essential quality of cholesterol and the importance of the body's unhampered ability to produce the material, when he remarked that:
"[...] more than twenty studies have shown that elderly people with high cholesterol live longer than elderly people with low cholesterol." 
And ironically, a high level of the allegedly “bad” cholesterol (LDL cholesterol) signifies a lower death rate, meaning higher longevity, in the majority of people over 60 years of age .
In observance of the known scientific facts, the (artificial) blockade of the body's natural production of cholesterol (at a pharmacological strength grade), either via pharmacotherapy (e.g., with prescription drugs such as statins) or a heavily concentrated single-nutrient botanical ingredient (e.g., garcinia cambogia hydroxycitric acid) –or, conceivably, a few specific, notably concentrated, botanical substances– is potentially (seriously) problematic.
Another one of the garcinia cambogia side effects associated with diabetes agitation bears great resemblance to a pro-diabetic action of statins: while garcinia cambogia supplements inhibit the ATP citrate lyase protein, statin cholesterol meds enhance the inactivation of ATP citrate lyase , quintessentially acting as some sort of garcinia cambogia catalyst. Both events decrease cell proliferation and increase apoptotic beta-cell loss (see Fig. 4). (Remember that ATP citrate lyase is commonly low –i.e., inhibited– in diabetics [20,146].).
Diabetes medication treatment with the widely used sulfonylureas (a class of diabetes drugs) including Orinase (tolbutamide), were shown to promote ROS/NO-induced beta-cell apoptosis in healthy pancreatic islet cell lines [277-280].
Besides intense cholesterol depletion and the killing of beta cells other diabetogenic activities of statin therapy match certain garcinia cambogia side effects. The scientific findings about the toxic impact on triglyceride synthesis by statin and garcinia cambogia side effects remarkably mirror each other. Statin studies found that in those people whose triglyceride was the most reduced had the highest all-cause mortality . In juxtaposition, research data uncovered that the lower the content of FFA-induced triglycerides in pancreatic beta-cells the higher the percentage of beta-cell eradication .
The disturbance of the normal biological function of cells is another commonality between adverse statin effects (statin poisoining) and garcinia cambogia side effects. Statins can adulterate the mitochondrial energy system [125,282], leading to the dysfunction of the mitochondria, inflammation of the pancreas (pancreatitis) and pancreatic dysfunction [283-287] –attributions that, by and large, quite closely match the diabetogenic garcinia cambogia side effects outlined in this article.
For instance, LPS-endotoxins inhibit mitochondrial respiration , and both side effects from statins and garcinia cambogia side effects involving cholesterol biosynthesis lead to an increase in blood endotoxin exposure (as discussed).
The rather broad similarity of adverse properties supports the reasonable premise that taking both garcinia weight loss pills and statin medications together (eliciting statin drug interactions with garcinia cambogia extract), synergistically raises the risk of developing or promoting diabetes (or complications with diabetes) via a number of delineated statin-garcinia cambogia side effects (see Fig. 8).
Also, one of the adverse statin drug side effects is rhabdomyolysis, a muscle disorder that leads to the breakdown of muscle tissue, manifested by muscle pain (myalgia) and weakness in the extremities [110,115,251]. (Many people have been killed by statin drug-caused rhabdomyolysis ). I reckon this adverse statin side effect might be behind the observed connection between Lipitor and back pain as the unpleasant condition frequently affects back muscles. And, other types of back tissue accounting for back pain, could be a target for statins (such as Lipitor) as well because statin cholesterol medicines poison the energy system of cell mitochondria [125,282], and mitochondrial dysfunction, oxidative stress, and a pro-apoptotic pattern are tied to back disc degeneration [331,332].
A few cases of rhabdomyolysis had been recorded in the medical literature and linked to Hydroxycut side effects (Hydroxycut, as you may recall, is a particular garcinia cambogia-HCA dietary supplement) [5,288]. A reasonable explanation for the fat-burning garcinia diet supplement's potential capability of invoking such damage is by its amplification of inflammatory-oxidative stress (e.g., "free radical attacks", endotoxin activation), via lipolysis activation, the promotion of fat metabolism, the degrading of mitochondrial respiration, and the strong stimulation of intracellular consumption of plasma LDL cholesterol. Because both with standard statin therapy and, specifically, in statin-induced rhabdomyolysis cases, one of the empirically documented statins' side effects is (acute) pancreatitis [283,285,286]. In models of acute pancreatitis, the destruction of pancreatic tissue can occur via the induction of apoptosis .
The manifold overlapping or shared adverse statin effects and garcinia cambogia side effects pose another serious, albeit largely covert, concern. Specifically, I'm referring to the potential drawn-out time frame in which both statin and garcinia cambogia side effects manifest themselves in clinical symptomatology and morbidity.
Peter Langsjoen, MD, raised awareness about that when he stated:
"Statins may be the perfect and most insidious human toxin in that adverse effects are often delayed by years and come about gradually." 
Statin or garcinia cambogia side effects may sneak up on the products' users sort of like a thief in the night.
"[...] perception requires interaction with the object [...]." (Ray Peat, PhD, Biologist, in 1976)
The expression "knowledge is power"  has become common use in many societies but knowledge (or information) is only real power if it is accurate, known, accepted, and applied.
Acquiring and verifying knowledge means active participation, as in a pro-active search for, or exposure to, various types and sources of knowledge. This is particularly a necessary requirement in today's authoritarian corporatism-dominated cultures that are widespread across the globe. The application of perceived information calls for the initiation of action.
This means that the elements of knowledge potential, that is...
... demand active personal involvement (i.e., a conscious effort).
Typically, traditional physicians don't critically examine the original medical literature for themselves when making decisions and patient recommendations about various therapeutic products and interventions [250,292-294].
Is there any reason, or good evidence, at hand to think that this would be any different with the towering Dr. Oz or most other (highly publicized) medical doctors or popular media pundits from the world of media medicine when recommending medical products or alternative health products?
An individual educated as both a medical doctor and a scientist, Michael Anchors, MD, PhD, proffered an explanation as to why doctors don't usually read the scientific literature:
"[...] few physicians read clinical studies [...]. Few know how. The skill is not taught in medical school. I was trained as both an M.D. and a Ph.D. I have seen both patterns of education. [...]. Doctors [...] get their information from the people who give them notepads and stethoscopes. American doctors are not paid to study; they are paid to work. [...]. [...] the only way to become a real expert is by reading scientific evidence." 
This strengthens the notion that a major role of a physician is as an (unwitting or witting) sales tool of the corporate industry he/she belongs to (i.e., allopathic medicine) rather than as a carrier of accurate scientific knowledge (i.e., "a real expert") about the true value of the medical regimes he/she administers or prescribes to patients.
The lack of most traditional medical doctors to pro-actively investigate the evidence on therapeutic interventions sanctioned and commissioned by the leadership of their affiliated medical industry body, or the popular culture, is further evident in their unwitting acceptance of numerous medical myths as solid facts.
In a 2007 publication of the British Medical Journal, two physicians reported after an examination of the medical literature that many popular beliefs, commonly accepted even by many medical doctors, were either unproven or untrue .
Among the often-held assumptions or "common knowledge" the study authors scrutinized were beliefs such as "You need 8 glasses of water a day" or "eating turkey makes you drowsy"  –notions which years later are still widely accepted by many individuals as factually accurate. (An aside: The "turkey-drowsiness" belief is based on the notion that the amino acid tryptophan is responsible for the effect because turkey is among the foods high in tryptophan. In my article "Tryptophan For Sleep –One Of The Good Natural Sleeping Aids?" I presented research data on tryptophan supplements, which typically contain much higher amounts of the nutrient than what's available in food items, that showed the products aren't particularly helpful for insomnia, making it rather unlikely that this substance is the predominant culprit for the drowsiness effect some people have experienced when eating tryptophan foods such as turkey.)
Study author Rachel Vreeman, MD, noted that:
"[...] staying current is not just a matter of adding new knowledge onto the things we already believe. Sometimes you really have to look back on things already in your head or things you already believe to be true, and reinvestigate, or investigate for the first time, whether those things are true.”
And co-study author Aaron Carroll, MD, opined that:
“Until someone takes the time to question and look for evidence, medical myths will remain accepted beliefs."
Instead of actively perusing the original scientific literature in the conception of practice guidelines and the provision of useful therapeutic medical advice for patients, the majority of conventional physicians rely on, or act based on:
But frequently, and exemplifying a perpetual global issue, the messages and information contained in pharmaceutical marketing literature, dispensed by drug industry representatives (or through other means such as (online) direct-to-consumer advertising (DTCA) by drug companies [298,299]), or the study abstracts of medical publications, don't correlate with or reflect the true scientific facts contained in the body content of the original study papers or the drug advertisements don't contain any research references at all –and, in the context of an obvious conflict-of-interests (vested interests), a large portion of the "scientific" studies aggregated in the medical literature is funded by the business of orthodox medicine itself so that deception, as in the fabrication of critically biased or fraudulent research data in favor of medical interventions, is quite common [110,118,119,124,127,249,250,265,300-312,340,344,370].
In "Malignant Medical Myths" (2006) author Joel M. Kauffman (1937-2015), PhD, wrote:
"While many physicians and other medical providers mean well, the information they use to make recommendations for many common conditions is often outdated, biased, flawed, and sometimes is based on outright fraud. Many medical tests and treatments are not based on sound research [...] but on the pitches of opinion leaders paid by those who would profit from their use." 
Drawn from their investigative data published in 2004 , some German scientists explained that three primary areas in the manipulation of facts ("Faktenmanipulation") account for the discrepancy between medical product advertisements and the actual scientific data contained in original study publications:
These observations had been documented for a very long time in the medical research literature, and the investigative findings the German scientists had established are still completely applicable and fact-based a decade later [124,249,309] –and thereafter.
Indicating the ample depth of the corrupt mainstream medical system, it should be kept in mind that the problem of "Faktenmanipulation" is even more complex, pernicious, and overlapping in terms of industry claims and study data. Simply because the real dangers of a lucrative product or intervention, or other opposing clinical data jeopardizing their sales, are frequently inadequately quantified or mentioned in the actual research studies or notable eligible studies with negative findings never even get published [115,118,119,124,127,132,249,265,281,302,304,308, 312,313,370], producing, what is known as, "publication bias".
A personal admission of Michael Anchors, MD, PhD, in 2012 contests to that:
"Nowadays, most research projects at the NIH [=U.S. National Institutes of Health], where I used to work, are NIH/pharma company partnerships. The content of the big studies legally belong to the pharmaceutical companies. They can publish it, alter it or suppress it at will. What do you suppose they do?"  [explanation added]
A good illustration of the discrepancy between medical claims and the medical literature are psychotropic medications, such as the SSRI antidepressants, which are based on the serotonin theory –that is, the authoritarian dogma that serotonin is “the happy hormone”. SSRI drugs, such as the renowned medication Prozac, to supposedly treat "the serotonin blues", have long been blockbuster goods for the big business of modern medicine, having enjoyed a steep commercial ascent during the 1980s and 90s.
Notwithstanding, in 2005, for example, two researchers wrote in their study paper published in the journal PLOS Medicine:
"The incongruence between the scientific literature and the claims made in FDA-regulated SSRI advertisements is remarkable, and possibly unparalleled." 
Despite that the actual serotonin truth deviates from the serotonin myth (i.e., serotonin is "the happiness hormone"), the medical profession has been widely promoting and, thus, hugely profiting from the utilization of the officially validated SSRI medications to this day.
(For further information on the serotonin-depression mantra and the side effects of tryptophan and serotonin see my essay "Tryptophan Side Effects: L-Tryptophan Is Far From Harmless" (direct link to it at the end of this article under Recommended next pages.)
To take another example of the orthodox medical fraternity: statin drugs, which are among the best sold and most widely consumed medications in industrialized nations. As broadly prescribed medications they've been sanctioned by research data of "evidence-based medicine" and are government-approved for safety and efficacy. Modern corporate medicine had pronounced that statins are "wonder drugs" or "miracle drugs" and are "the most powerful inventions to prevent cardiovascular events" (based on the cholesterol-heart disease hypothesis, a disproved medical dogma) as well as other claims [115,127].
In a review paper of officially deemed "substantial" evidence-based studies (e.g., randomized controlled trials) relating to "cardiovascular primary prevention" and "statin side effects" the authors wrote:
"There is a categorical lack of clinical evidence to support the use of statin therapy in primary prevention."  [emphasis added]
"[...] there is ample evidence to show that statins actually augment cardiovascular risk in women, patients with Diabetes Mellitus and in the young. Furthermore statins are associated with triple the risk of coronary artery and aortic artery calcification."  [emphasis added]
"What is even more disparaging is that not only has there been a failure to report on these negative side-effects of statins, there has actually been active discouragement to publish any negative studies on statins."  [emphasis added]
“[...] findings on statin major adverse effects had been under-reported and the way in which they withheld from the public, and even concealed, is a scientific farce.”  [emphasis added]
Analogously, in a review study paper of statin trials, the authors (among them the noted independent medical researcher, Uffe Ravnskov, MD, PhD, who had published and written numerous works on statins and cholesterol), concluded with:
"[...] the presentation of statin trial findings can be characterized as a deceptive strategy in which negligible benefits of statin treatment have been amplified with the use of relative risk statistics, and that serious adverse effects are either ignored or explained away as a chance occurrences."  [emphasis added]
Some of the most genuine evidence has linked statin drug use with “serious adverse effects”, such as muscle disorders, liver damage, joint problems (e.g., arthritis), cataracts, nerve damage, birth defects, arterial calcification, pancreatitis, erectile dysfunction (“impotence”), low libido/loss of libido, memory loss, brain dysfunction, suicide, violence, diabetes, autoimmune diseases (fibromyalgia, multiple sclerosis, etc.), and with an increased risk of cancer and –as mentioned earlier– with higher mortality (statin cholesterol drugs only slightly lower the risk of non-fatal heart attacks) [110-127,251,253-260,281-286,333,341-344,365-367,370].
As an example, in the statin “CARE trial” (pravastatin study) , there was a highly significant increase in the development of breast cancer among statin-treated women compared to women of the control group [115,370] (a disturbing relevant finding that's entirely omitted in the study's abstract and downplayed by the trial's authors in their paper). Even more startling, Uffe Ravnskov, MD, PhD, noted in the year 2000 that, curiously, in subsequent statin studies (after the CARE study) "all patients with cancer [...] have been excluded from the trials" . To deliberately hide a most serious statin side effect?
Here's yet another example of the enormous institutional investment of the industry of modern allopathic medicine in their highly profitable products and services: "preventative" cancer screening tests (e.g., breast cancer screening procedures such as mammography).
The widely disseminated narrative of the ruling medical authorities and the so-called cancer charities has continuously been that early detection by cancer screening "saves lives" and is, thus, highly beneficial.
Yet, the most reliable research data on medical screening, derived from meta-analyses and randomized trials, expose that the mass use of standard cancer detection technologies in asymptomatic (=presumed healthy) adults do little to prevent deaths [315,316]. In other words, the vast majority of traditional "preventive" screening tests do not save lives.
The authors of one of these studies voiced that:
"Among currently available screening tests for diseases where death is a common outcome, reductions in disease-specific mortality are uncommon [...]."  [emphasis added]
And, it is also common for randomized studies on cancer screening to omit to properly cite the serious harms from medical screening tests [315,317].
(For more breast cancer information and the actual facts on mammogram screening see my e-book "The Mammogram Myth" –direct link to it at the end of this article under Recommended next pages.)
This knowledge hatches some important questions:
The deep realization of these realities about the orthodox medical
enterprise explains such rather discouraging, yet accurate, statements
as that of Ralph K. Campbell, MD, in 2014:
"We should not accept the contents of an advertisement without examining the facts. But transparency, by design, is lacking, making it difficult to get at the concealed truth." 
Michel de Lorgeril, MD, a cardiologist and research scientist, described the false medical script of the “statin miracle” and the deceptive “cholesterol saga” as "the most extraordinary medical and scientific scam ever set up in modern and postmodern society" .
Alongside propagandized medical "miracle drugs" or "wonder drugs" (and "breakthrough" cancer screening tests) we have, in societies of consumerism, propagandized “wonder supplements” in the form of, for example, "miracle diet pills" such as "breakthrough" or "miracle" garcinia cambogia weight loss supplements or other "research verified" weight reduction products.
In the research literature on weight loss pills we encounter similar or the same shady dynamics as described by the German researchers (e.g., the true health risks of diet pills are underemphasized, minimized, or disregarded) because, akin to the corrupt situation in medical research, numerous study investigations on the garcinia cambogia weight loss products (and other diet pills) are conducted by people with significant competing moneyed interests (conflict-of-interests) linked to the diet supplement industry . (One such example is a positive garcinia cambogia extract study I had mentioned early on in this piece –see reference #10.)
Unfortunately, these objectivity-compromising vested competing interests among study authors remain most often unacknowledged in the marketing literature and the messages of the vitamin world, such as:
For example, in the episode of the Dr. Oz TV Show where the famous physician praised the "fat buster"/"breakthrough" diet pill garcinia cambogia extract, one of the featured garcinia researchers is Dr. Harry Preuss . Preuss had authored many garcinia cambogia studies, some of them as the lead author –such as the one I cited in the article you're reading . Yet in that study (and others), Preuss and his co-authors failed to disclose conflict-of-interests (COI), such as between them and the product manufacturer or that the study had been sponsored by the product maker . And, not unlike a domino effect, Doctor Oz, whom many people find very trustworthy, genuine, and convincing, also omitted to mention these relationships in that particular episode of the Dr. Oz TV Show .
In corporate cultures where the public is routinely lied to by the "authorities" one also increasingly finds individuals who ask questions like "is garcinia cambogia a hoax?" or "are Dr. Oz's garcinia cambogia claims legitimate?" before committing to official marketing narratives.
What the public most certainly deserves to know, and must know, is that studies compromised by COI "may over-state product safety and effectiveness" and that "a lack of funding source declaration reduces validity of findings" .
An investigative analysis of the health recommendations and bold statements made in the very successful internationally syndicated Dr. Oz TV Show found that more than half of the advice or health claims (includes the ample sphere of Dr. Oz weight loss tips) were not backed by considerable scientific evidence or were contradicted by research data, and that potential harms of the recommendations were "less commonly mentioned" .
Usually, a topic-relevant balanced overview of the scientific literature is missing in the marketing material and messages for both medical and alternative therapeutic products and procedures, challenging or obstructing the ability of the general public for informed decision making.
The currently (2014/2015 and prior years) existing (total) lack of reference to pertinent medical evidence on pro-diabetic garcinia cambogia side effects in the commercial announcements for this diet supplement, whether in print material, on television, online, or otherwise, is in line with this overall trend in commercialized societies.
"[...] if a scientific hypothesis is sound, it must agree with all observations. A hypothesis is not like a sports event, where the team with the greatest number of points wins the game. Even one observation that does not support a hypothesis is enough to disprove it. The proponents of a scientific idea have the burden of proof on their shoulders. The opponent does not have to present an alternative idea; his task is only to find the weakness in the hypothesis. If there is only one proof against it, one proof that cannot be denied and that is based on reliable scientific observations, the hypothesis must be rejected." (Uffe Ravnskov, MD, PhD, Independent Researcher)
According to official diabetes type 2 information published by the Centers for Disease Control and Prevention (CDC) in 2014, diabetes mellitus type 2 affects a bit over 29 million people (or around 10% of the population), of which roughly 28% are undiagnosed . Moreover, 86 million people have prediabetes (sometimes called "impaired glucose metabolism") whereas 90% of them don't know they have the condition . Millions of adults have the metabolic syndrome that predisposes them to diabetes and other chronic degenerative diseases .
An adult diabetic has a 50% greater risk of death than an adult without diabetes . Having diabetes greatly increases premature mortality from heart disease (e.g., heart attacks), stroke, infectious diseases, certain cancers, and suicides [12,320]. Per data from 2010, diabetes is a top leading cause of death in the US .
One revealing implication of these data: since statins are among the causes of diabetes mellitus and diabetes significantly increases the risk of cardiovascular disease (e.g., atherosclerosis, deaths from heart attacks), statins cause the very disease official licensed medicine alleges these drugs will prevent. This chain-of-events would coherently explain (at least in part) the data that statins are notably associated with increased cardiovascular disease events [251,334,360].
Diabetes is also associated with a higher incidence of renal failure, blindness, lower-limb amputations, and mental disorders [12,320].
So, is it safe for diabetics to take garcinia cambogia extract?
The research data chronicled in this treatise, per my understanding thereof, do not confirm at all that there are no serious garcinia cambogia side effects, that garcinia diet supplements are safe, or that they offer benefits for diabetics and ought to be recommended for them (i.e., a diet for diabetes should not include the consumption of HCA-garcinia cambogia extract).
In short, the hypothesis or notion that garcinia cambogia extract is a beneficial agent for diabetes is not scientifically "sound" (see Ravenskov's quote at the start of this section).
Instead, the information suggests with rather compelling significance that in diabetics (or prediabetics), in obese or overweight individuals, or in people on a high fat diet (of highly processed foods), whose ATP citrate lyase index is traditionally low from an increase in blood fats, garcinia-hydroxycitric acid, by way of...
... is likely to lead to the (further) disruption of insulin release, hyperglycemia, and the promotion, or initiation, of oxidative stress in the brain and pancreas, and ß-cell failure or destruction. Therefore, the regular consumption of HCA-laden garcinia cambogia extract isn't a general viable modality among therapeutic interventions for diabetes. (Keep in mind that some of the data on the significant statin-diabetes connection also revealed that the diabetes risk increases in relatively healthy and presumably very healthy people who've been eating the drug over an extended period of time [343,367], which doesn't exempt the possibility that diabetes-inciting garcinia cambogia side effects raise that risk as well).
Last but not least, the exploration of diabetogenic garcinia cambogia side effects begs the question whether other "magic" or "miracle diet pills" and slimming supplements that operate physiologically as a "fat burner" may have comparable (unacknowledged) degenerative consequences.
And ironically, as far as garcinia cambogia benefits go –and alleged benefits of diet supplements in general– positive weight loss effects might conceivably not be primarily due the actual ingredients disclosed on the labels of the diet products. Rather, the purported slimming benefits could possibly be the result of therapeutic pharmacological drugs (or other materials) that are not disclosed on the supplement ingredient labels. Because (“miracle”) diet supplements are among the top contaminated supplements on the (US) market (see my article "Health Risks From Dietary Supplements | Contaminated Supplements" –direct link to it at the end of this article under Recommended next pages). One could call this a little-known ugly truth about diet supplements.
In summary, in the very people garcinia cambogia weight loss diet pills are typically recommended for –that is, overweight or obese people both of whom have an increased diabetes risk or are frequently diabetics– the weight loss product should probably not be used (particularly on a long-term schedule) because garcinia cambogia side effects are likely contributing to the development of diabetes (or prediabetes), or are exacerbating an existing diabetic state.
(Originally published: 20-April-2015 | Last update: 2-Aug-2021)
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