A practical reference on prohibited list: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-02-12. Anything still debated is marked as such rather than presented as settled.
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.
Early clinical research explored GW501516 for lipid disorders, obesity, and diabetes. Some short-term human studies reported changes in HDL cholesterol, LDL cholesterol, and triglycerides. The development program was discontinued after rodent studies showed dose-dependent tumor formation in multiple tissues, including liver, bladder, stomach, and skin. These findings raised concerns about long-term cancer risk in humans. Because human exposure data are limited, the clinical significance of the rodent tumors remains uncertain.
Literature on cardarine often separates receptor pharmacology from toxicology. Mechanistic papers describe PPARδ activation and gene expression changes, while safety assessments focus on carcinogenicity and species differences. Questions remain about whether rodent tumors arise through PPARδ-dependent or off-target mechanisms. Another open area is how human metabolism and exposure compare with those in animal studies. Analytical methods such as liquid chromatography–mass spectrometry are used to confirm identity in biological and product samples.
GW501516 acts as an agonist at the peroxisome proliferator-activated receptor delta, a nuclear receptor that regulates gene expression. Activation shifts transcription toward genes involved in fatty acid uptake, oxidation, and energy expenditure. The compound does not bind the androgen receptor and therefore differs from anabolic steroids and SARMs. In rodent models, this metabolic shift has been linked to increased running endurance and reduced fat accumulation. The exact downstream pathways in humans remain incompletely characterized.
| 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 |
Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
Cardarine has no approved therapeutic indication and is not marketed as a medicine. The World Anti-Doping Agency lists GW501516 as a prohibited substance at all times, covering both in-competition and out-of-competition periods. National laws vary: some countries treat it as an unapproved drug subject to import controls, while others have specific restrictions on sale for human consumption. It is often sold as a research chemical, a label that does not imply safety or legality. Enforcement actions have targeted online vendors and shipments.
Anti-doping laboratories identify GW501516 and related metabolites using liquid chromatography coupled with tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be analyzed. The method targets the parent compound and phase I and phase II metabolites, which extend the detection window. Because the substance is prohibited at all times, athletes can be tested outside competition. Detection limits and windows depend on the assay, sample type, and individual metabolism.
Regulatory treatment varies, but cardarine is not approved as a medicine. Sports authorities list GW501516 as a prohibited substance, and it is banned at all times under the World Anti-Doping Agency code. Many countries restrict sales for human consumption, while online vendors market it as a research chemical. Such products may lack purity data, and their actual contents can differ from the label. Purchasing or possessing cardarine may carry legal consequences depending on jurisdiction. The compound is not a dietary supplement ingredient in regulated markets.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
== History == The precise origin of absinthe is unclear. The medical use of wormwood dates back to ancient Egypt and is mentioned in the Ebers Papyrus from around 1550 BC. Wormwood extracts and wine-soaked wormwood leaves were used as remedies by the ancient Greeks. Moreover, some evidence exists of a wormwood-flavoured wine in ancient Greece called absinthites oinos. Lucretius' De Rerum Natura (I, 936–950) says that a drink containing wormwood was given as medicine to children in a cup with honey on the brim to make it drinkable. The first evidence of absinthe, in the sense of a distilled spirit containing green anise and fennel, dates to the 18th century. According to popular legend, it began as an all-purpose patent remedy created by Dr. Pierre Ordinaire, a French doctor living in Couvet, Switzerland, around 1792 (the exact date varies by account). Ordinaire's recipe was passed on to the Henriod sisters of Couvet, who sold it as a medicinal elixir. By other accounts, the Henriod sisters may have been making the elixir before Ordinaire's arrival. In either case, a certain Major Dubied acquired the formula from the sisters in 1797 and opened the first absinthe distillery named Dubied Père et Fils in Couvet with his son Marcellin and son-in-law Henry-Louis Pernod. In 1805, they built a second distillery in Pontarlier, France, under the company name Maison Pernod Fils. Pernod Fils remained one of the most popular brands of absinthe until the drink was banned in France in 1914.
Activin and inhibin are two closely related protein complexes that have almost directly opposite biological effects. Identified in 1986, activin enhances FSH biosynthesis and secretion, and participates in the regulation of the menstrual cycle. Many other functions have been found to be exerted by activin, including roles in cell proliferation, differentiation, apoptosis, metabolism, homeostasis, immune response, wound repair, and endocrine function. Conversely, inhibin downregulates FSH synthesis and inhibits FSH secretion. The existence of inhibin was hypothesized as early as 1916; however, it was not demonstrated to exist until Neena Schwartz and Cornelia Channing's work in the mid-1970s, after which both proteins were molecularly characterized ten years later. Early in the process of its discovery, inhibin produced by the ovaries was also referred to as folliculostatin. Activin is a dimer composed of two identical or very similar beta subunits. Inhibin is also a dimer wherein the first component is a beta subunit similar or identical to the beta subunit in activin. However, in contrast to activin, the second component of the inhibin dimer is a more distantly-related alpha subunit. Activin, inhibin and a number of other structurally related proteins such as anti-Müllerian hormone, bone morphogenetic protein, and growth differentiation factor belong to the TGF-β protein superfamily.
Current issues for the CV reside in outbreaks of violence with criminal organizations for control of drug routes and turf wars with militias over territories, such as the Complexo do Alemão (which is sometimes considered the "headquarters" of the organization).
Investigation of possible scenarios of the origin of life: By testing different analogs, researchers try to answer the question of whether life's use of DNA and RNA was selected over time due to its advantages, or if they were chosen by arbitrary chance; As a tool to detect particular sequences: XNA can be used to tag and identify a wide range of DNA and RNA components with high specificity and accuracy; As an enzyme acting on DNA, RNA and XNA substrates - XNA has been shown to have the ability to cleave and ligate DNA, RNA and other XNA molecules similar to the actions of RNA ribozymes; As a tool with resistance to RNA hydrolysis; Investigation of the mechanisms used by enzyme; and Investigation of the structural features of nucleic acids.
Sources: en.wikipedia.org
According to Morning Consult polling, Biden maintained an approval rating above 50% during his presidency's first eight months. In August 2021, it began to decline, reaching the low forties by December. This was attributed to the Afghanistan withdrawal, increasing hospitalizations from the Delta variant, high inflation and gas prices, disarray within the Democratic Party, and a general decline in popularity customary in politics. In 2023, Biden's approval rating was the lowest of any modern U.S. president after three years in office. Gallup, Inc. found Biden's approval ratings to be consistently above 50% during his first few months in office, but by August, his ratings began to decline. He had a 98% approval rating from Democrats in February 2021, but by December only 78% approved of his presidency. By October 2023, his rating among Democrats had reached a record low of 75%. His approval rating among Republicans has been consistently in the single digits, aside from his first few months in office. Gallup also noted that Biden's public support eroded each year he was in office: he averaged 49% approval in his first year, 41% in his second, 40% in his third, and 39% in 2024. In July 2024, just before he withdrew from the presidential election, Gallup found his approval rating had fallen to an all-time low of 36%. Gallup found that Biden had an average approval rating of 42.2% throughout his presidency, lower than all other presidents' except Trump's in his first term, at 41.1%.
=== Government of Qatar === The Qatari government denied any involvement in the scandal with the Qatari Mission to the European Union saying, "[t]he State of Qatar categorically rejects any attempts to associate it with accusations of misconduct. Any association of the Qatari government with the reported claims is baseless and gravely misinformed. The State of Qatar works through institution-to-institution engagement and operates in full compliance with international laws and regulations." They later accused the United Arab Emirates of "orchestrating" the scandal. Journalist Jack Parrock reported that the Qatari government claimed "everyone" believed that the UAE was behind it. According to the Qatari state-funded Middle East Monitor "[t]he European Union Parliament has opened an official investigation into corruption cases and suspicions involving senior officials from the UAE to launch a smear campaign against Qatar coinciding with hosting the 2022 FIFA World Cup." Qatar claims that "since 2017, Qatar feels it has been the victim of a media attack orchestrated by Abu Dhabi, with false documents and fake news." The Qatari government stated that they were being "exclusively criticised and attacked" by Belgian authorities and conveyed disappointment that the Belgian government "made no effort to engage with our government to establish the facts". Qatar warned that the continued implication of Qatar in the scandal will "negatively effect" the energy cooperation between the EU and Qatar.
== History == In 1976, Gustilo and Anderson refined the early classification system proposed by Veliskasis in 1959. An early study conducted by Gustilo in 1976 showed that primary closures with prophylactic antibiotics of Type I and type II fractures reduced the risk of infection by 84.4%. Meanwhile, early internal fixation and primary closure of the wound in Type III fractures have a greater risk of getting osteomyelitis. However, Type III fractures occur in 60% of all the open fracture cases. Infection of the Type III fractures is observed in 10% to 50% of the time. Therefore, in 1984, Gustilo subclassified Type III fractures into A, B, and C with the aim of guiding the treatment of open fractures, communication and research, and to predict outcomes. Based on the results of the previous studies, Gustilo initially recommended therapeutic irrigation and surgical debridement for all fractures with primary closure for Type I and II fractures; secondary closure without internal fixation for Type III fractures. However, soon after that, he recommended internal fixation devices for Type III fractures.
Almost all patients develop oliguria or anuria within a few hours to as late as 6 days post bite. In some cases, kidney dialysis is necessary due to acute kidney injury, but this is not often caused by hypotension. It is more often the result of intravascular hemolysis, which occurs in about half of all cases. In other cases, ARF is often caused by disseminated intravascular coagulation.
On the night of 24/25 July 1261, Strategopoulos and his men approached the city walls and hid at a monastery near the Gate of the Spring. Strategopoulos sent a detachment of his men, led by some of the thelematarioi, to make their way to the city through a secret passage. This afforded them the opportunity to attack the walls from the inside, which surprised the guards and opened the gate, giving the Nicaean forces an entry into the city. The Latins were taken completely unaware, and after a short struggle, the Nicaeans gained control of the Theodosian land walls. As news of this spread across the city, the Latin inhabitants, from Emperor Baldwin II downwards, hurriedly rushed to the harbours of the Golden Horn, hoping to escape by ship. At the same time, Strategopoulos' men set fire to the Venetian buildings and warehouses along the coast to prevent them from landing there. Due to the timely arrival of the returning Venetian fleet, many of the Latins managed to evacuate to the still Latin-held parts of Greece, marking the end of the Latin occupation with the city's restoration to the Byzantines.
Sources: en.wikipedia.org
Aeroponics is a system wherein roots are continuously or discontinuously kept in an environment saturated with fine drops (a mist or aerosol) of nutrient solution. The method requires no substrate and entails growing plants with their roots suspended in a deep air or growth chamber with the roots periodically wetted with a fine mist of atomized nutrients. Excellent aeration is the main advantage of aeroponics.
The three Western Allies retained occupation powers in Berlin and certain responsibilities for Germany as a whole. Under the new arrangements, the Allies stationed troops within West Germany for NATO defence, pursuant to stationing and status-of-forces agreements. With the exception of 55,000 French troops, Allied forces were under NATO's joint defence command. (France withdrew from the collective military command structure of NATO in 1966.)
Many mixed valence compounds contain both iron(II) and iron(III) centers, such as magnetite and Prussian blue (Fe4[Fe(CN)6]3). The latter is used as the traditional "blue" in blueprints. Iron is the first of the transition metals that cannot reach its group oxidation state of +8, although its heavier congeners ruthenium and osmium can, with ruthenium having more difficulty than osmium. Ruthenium exhibits an aqueous cationic chemistry in its low oxidation states similar to that of iron, but osmium does not, favoring high oxidation states in which it forms anionic complexes. In the second half of the 3d transition series, vertical similarities down the groups compete with the horizontal similarities of iron with its neighbors cobalt and nickel in the periodic table, which are also ferromagnetic at room temperature and share similar chemistry. As such, iron, cobalt, and nickel are sometimes grouped together as the iron triad. Unlike many other metals, iron does not form amalgams with mercury. As a result, mercury is traded in standardized 76 pound flasks (34 kg) made of iron. Iron is by far the most reactive element in its group; it is pyrophoric when finely divided and dissolves easily in dilute acids, giving Fe2+. However, it does not react with concentrated nitric acid and other oxidizing acids due to the formation of an impervious oxide layer, which can nevertheless react with hydrochloric acid. High-purity iron, called electrolytic iron, is considered to be resistant to rust, due to its oxide layer.
Gamma-Dynacare Medical Laboratories is a Canadian medical laboratory services company based in Brampton, Ontario, Canada. Dynacare operates laboratories in Brampton, Bowmanville, London, Ottawa, Thunder Bay, Pointe-Claire, Laval, and Winnipeg. In addition to the main laboratories Dynacare operates patient services centers throughout Ontario, Quebec, Manitoba, Saskatchewan, Alberta and British Columbia. Dynacare is an operational partnership founded in 1997 as Gamma-Dynacare between: Dynacare Laboratories; Gamma North Peel Partnership Inc.; and Bio-Science Laboratory (Ontario) Limited. In 2002 Dynacare Laboratories (one of the Dynacare partners) was acquired by LabCorp for $480-million (U.S.) while also assuming Dynacare debt worth $205-million. In 2015, it rebranded itself back to Dynacare. In 2011 Dynacare acquired the medical laboratory division of Warnex Inc. (TSX:WNX) for $7.5 Million. In 2023 Dynacare acquired the medical laboratories in British Columbia known as Valley Medical Laboratories. This increased the Dynacare presence in British Columbia by adding about 12 locations in Kelowna and throughout the Okanagan Valley.
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.
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.