This is a working overview of regulatory status, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-09-09 and is reviewed periodically as new material appears.
Cardarine is a common name for GW501516, a synthetic compound first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
Sporting authorities added GW501516 to prohibited lists after it appeared in athlete samples and online markets. The World Anti-Doping Agency classifies it as a hormone and metabolic modulator, and its use can lead to an anti-doping rule violation. Some early laboratory work suggested effects on fatty acid oxidation and endurance-related metabolism in animals, but those findings do not establish safe or effective use in people. Reports of adverse events in humans are scarce and often anecdotal, which complicates risk assessment.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
| Property | Value | Notes |
|---|---|---|
| IUPAC name | {4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid | Systematic name for GW501516 |
| CAS Registry Number | 317318-70-0 | Unique identifier for the parent compound |
| Molecular formula | C21H18F3NO3S2 | Includes carbon, hydrogen, fluorine, nitrogen, oxygen, and sulfur |
| Molecular weight | 453.5 g/mol | Approximate value for the neutral form |
| Appearance | White to off-white powder | Typical description for purified laboratory material |
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
Amin al-Husayni, as chairman Jamal al-Husayni, as vice-chairman Husayin al-Khalidi Emile al-Ghury Ahmed Hilmi Abd al-Baqi The United Kingdom government called the 1946–47 London Conference on Palestine in an attempt to bring peace to its Mandate territory, which began on 9 September 1946. The conference was boycotted by the AHE as well as the Jewish Agency, but was attending by Arab League states, which argued against any partition.
== Critiques == Critics say that TCM theory and practice have no basis in modern science, and that TCM practitioners do not agree on what diagnosis and treatments should be used for any given person. A 2007 editorial in the journal Nature wrote that TCM "remains poorly researched and supported, and most of its treatments have no logical mechanism of action." It also described TCM as "fraught with pseudoscience". A review of the literature in 2008 found that scientists are "still unable to find a shred of evidence" according to standards of science-based medicine for traditional Chinese concepts such as qi, meridians, and acupuncture points, and that the traditional principles of acupuncture are deeply flawed. "Acupuncture points and meridians are not a reality", the review continued, but "merely the product of an ancient Chinese philosophy". In June 2019, the World Health Organization included traditional Chinese medicine in a global diagnostic compendium, but a spokesman said this was "not an endorsement of the scientific validity of any Traditional Medicine practice or the efficacy of any Traditional Medicine intervention." A 2012 review of cost-effectiveness research for TCM found that studies had low levels of evidence, with no beneficial outcomes. Pharmaceutical research on the potential for creating new drugs from traditional remedies has had few successful results. Proponents suggest that research has so far missed key features of the art of TCM, such as unknown interactions between various ingredients and complex interactive biological systems.
Veneer is obtained either by "peeling" the trunk of a tree or by slicing large rectangular blocks of wood known as flitches. The appearance of the grain and figure in wood comes from slicing through the growth rings of a tree and depends upon the angle at which the wood is sliced. There are three main types of veneer-making equipment used commercially:
== Further reading == Brown, Brandon P (2011). "Acupuncture." Magill's Medical Guide, 6th ed., vol. 1. Salem Press. ISBN 978-1-63700-107-3. Ulett GA (2002). "Acupuncture". In Shermer M (ed.). The Skeptic Encyclopedia of Pseudoscience. ABC-CLIO. pp. 283 ff. ISBN 978-1-57607-653-8. William FW, ed. (2013). "Acupuncture". Encyclopedia of Pseudoscience: From Alien Abductions to Zone Therapy. Routledge. pp. 3–4. ISBN 978-1-135-95522-9. Bivins, Roberta E. (2000). Acupuncture, Expertise, and Cross-Cultural Medicine. New York: Palgrave. ISBN 0-333-91893-2. FRONTLINE: The Alternative Fix - "What is acupuncture?" (4 November 2003). PBS Video.
Sources: en.wikipedia.org
==== Age-related myelin decline ==== Retrogenesis is a medical hypothesis that just as the fetus goes through a process of neurodevelopment beginning with neurulation and ending with myelination, the brains of people with Alzheimer's disease go through a reverse neurodegeneration process starting with demyelination and death of axons (white matter) and ending with the death of grey matter. Likewise the hypothesis is, that as infants go through states of cognitive development, people with Alzheimer's disease go through the reverse process of progressive cognitive impairment. According to one theory, dysfunction of oligodendrocytes and their associated myelin during aging contributes to axon damage, which in turn generates amyloid production and tau hyperphosphorylation. Comorbidities between the demyelinating disease, multiple sclerosis, and Alzheimer's disease have been reported.
However, the increase in those without coeliac disease eating gluten-free may lead to decreased vigilance of food manufacturers and misunderstandings around the importance of avoiding cross-contamination. Many gluten-free substitutions are lower in nutritional quality and may lack vitamins and nutrients that their gluten-containing counterparts have. Ingredients commonly used in gluten-free substitutes, such as rice, potato, corn, and tapioca starches, have lower levels of fibre, carbohydrates, and vitamins but are higher in sugars and fats than gluten-containing diets. Currently, there are no federal regulations for gluten in non-food products such as medications, cosmetics, and hygiene products. Although the amount of gluten in non-food products is usually minimal, mislabelling of gluten products can confuse people and potentially adversely impact health.
=== Genetic variations === An epigenetic mechanism (hypermethylation of CpG islands in the NET gene promoter region) that results in reduced expression of the noradrenaline (norepinephrine) transporter and consequently a phenotype of impaired neuronal reuptake of norepinephrine has been implicated in both postural orthostatic tachycardia syndrome and panic disorder. rs5569 is a variant of SLC6A2.
== Early autosomal research == Before the discovery of mtDNA variation and Y-chromosomal variation in the 1980s and 1990s, respectively, it was not possible to distinguish male from female effects in population genetics. Instead, researchers had to rely on autosomal variation, starting with the first population genetic study using blood groups by Ludwik Hirszfeld in 1919. Later other genetic polymorphisms were used, for example polymorphisms of proteins of the blood plasma, polymorphisms of human lymphocyte antigens or polymorphisms of immunoglobulins. On this basis, correlations between languages and genetic variation occasionally were proposed, but sex-specific questions could not be addressed until the 1990s, when both mtDNA and Y-chromosomal variation in humans became available for study.
glycolysis The metabolic pathway in which carbohydrate sugars such as glucose are broken down into simpler molecules, releasing chemical energy which can then be used for various cellular functions. In a series of ten enzyme-catalyzed reactions, each molecule of glucose is converted into two molecules of pyruvate, with the free energy liberated in this process simultaneously being used to form high-energy bonds in two molecules of reduced nicotinamide adenine dinucleotide (NADH) and two molecules of adenosine triphosphate (ATP). In aerobic conditions pyruvate and NADH are further oxidized in the mitochondria; in anaerobic conditions NADH itself subsequently reduces pyruvate to lactate.
Sources: en.wikipedia.org
Throughout fermentation ammonium is the primary form of assimilable nitrogen available to yeast. However, at crushing the juice may contain anywhere from 0 to 150 mg/L of ammonium salts, depending on the how much nitrogen the grapevine received in the vineyard. In the cell, the inorganic ammonia and ammonium ions get "fixed" through a series of chemical reactions that ultimately yields the organic nitrogen source glutamate. The ammonium ion also serves as an allosteric regulator for one of the enzymes used in glycolysis and may also have an effect on how the yeast cell transports glucose and fructose into the cell. The proteins used in the main glucose transport system have been shown to have a half-life of 12 hours. In the studies that put yeast cells through "ammonia starvation" the entire system shut down after 50 hours which gives strong evidence that a lack of ammonia/ammonium can create increase risk of having a stuck fermentation. Glutathione (GSH: L-gamma-glutamyl-L-cysteinylglycine) is present in high concentrations up to 10 mM in yeast cells. It assumes a pivotal role in response to sulfur and nitrogen starvation. Ammonia is not used by bacteria such as Acetobacter and the lactic acid bacteria used in malolactic fermentation.
where Ra, Rb, Rc, Rd are the radii in the circles externally tangent to the sides a, b, c, d respectively and the extensions of the adjacent two sides for each side. Several more characterizations are known in the four subtriangles formed by the diagonals.
Leaf protein concentrate (LPC) is a proteinaceous edible mass extracted from leaves. It can be a lucrative source of low-cost and sustainable protein for food as well as feed applications. Although the proteinaceous extracts from leaves have been described as early as 1773 by Rouelle, large scale extraction and production of LPC was pioneered post the World War II. In fact, many innovations and advances made with regards to LPC production occurred in parallel to the Green Revolution. In some respects, these two technologies were complimentary in that the Green Revolution sought to increase agrarian productivity through increased crop yields via fertiliser use, mechanisation and genetically modified crops, while LPC offered the means to better utilise available agrarian resources through efficient protein extraction.
After the 2020 presidential election, Kennedy and 11 other Republican senators said they would object to certain states' electoral votes in the 2021 United States Electoral College vote count on January 6, 2021, unless the vote was audited. He was participating in the certification when Trump supporters stormed the United States Capitol. Kennedy called the attack "despicable and shameful" and called for the rioters "to go to jail and pay for the destruction they caused." When the Capitol was secured and Congress returned to complete the certification, he objected to the certification of Arizona's electoral votes. On February 9, 2021, Kennedy voted against Trump's second impeachment. Kennedy said the impeachment effort was unconstitutional because Trump was no longer president. He called the impeachment process "a thinly veiled effort by the uber-elites in our country, who look down on most Americans, to denigrate further those people who chose to vote for President Trump and not vote for President Biden." On March 6, 2021, Kennedy voted against the American Rescue Plan Act of 2021, a COVID-19 recovery package. He said he voted against it because it was "an orgy of pork", adding, "This is not a coronavirus bill, not the way it's been portrayed". On May 28, 2021, Kennedy voted against the January 6 commission House Speaker Nancy Pelosi proposed to investigate the January 6 attack. The commission failed to gain traction, but the House later successfully established the January 6 committee as an alternative.
Sources: en.wikipedia.org
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.
It is prohibited by the World Anti-Doping Agency as a hormone and metabolic modulator. Athletes who test positive for GW501516 can face sanctions, including suspensions and loss of results.
Cardarine is a common or trade-style name, while GW501516 is the research code for the same chemical entity. Some sources also use Endurobol or GSK-516. The names refer to the same compound, not distinct drugs.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.