Prohibited list raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-03-05 and is reviewed periodically as new material appears.
Cardarine is a common name for GW501516, an investigational compound developed in the 1990s for metabolic conditions. It acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in lipid and energy metabolism. The compound is frequently mislabeled as a selective androgen receptor modulator, or SARM, but its molecular target is different. GW501516 reached early clinical testing before development was discontinued. It has no approved therapeutic use in any country. The name cardarine is not a formal international nonproprietary name.
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.
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 |
|---|---|---|
| Common synonyms | GW501516; GW-1516; endurobol | GW501516 is the research code |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator |
| Molecular formula | C21H18F3NO3S2 | Established chemical formula |
| Molar mass | 453.5 g/mol | Calculated from the formula |
| Regulatory status | Prohibited in sport; not approved as medicine | Status varies by country |
Laboratory detection of GW501516 commonly uses liquid chromatography coupled with tandem mass spectrometry. The method can identify the parent compound or its metabolites in urine and blood after sample cleanup. Protein precipitation, solid-phase extraction, or enzymatic hydrolysis may precede analysis, depending on the matrix. Reference standards are required for accurate quantification and confirmation. Because the compound is not approved, testing often occurs in anti-doping, forensic, or research settings rather than routine clinical care. Results are reported with limits of detection and quantification.
Stability of GW501516 depends on form, temperature, light exposure, and moisture. Solid reference material is typically stored frozen or refrigerated in a desiccator and protected from light. Solutions in organic solvents such as dimethyl sulfoxide are often kept frozen in aliquots to reduce freeze-thaw cycling. Aqueous solubility is low, so aqueous stock solutions can be difficult to prepare without cosolvents. Degradation may appear as changes in chromatographic purity or mass spectral signal. Stability studies are needed to establish shelf life for any specific preparation.
Quality assessment for cardarine samples usually combines identity, purity, and impurity testing. Nuclear magnetic resonance spectroscopy and mass spectrometry can confirm molecular structure, while high-performance liquid chromatography estimates purity. Certificates of analysis from testing laboratories may list these results, but they do not establish safety or legality. In the absence of approved manufacturing, products sold online may contain the wrong compound, variable amounts, or unlisted contaminants. Independent verification is therefore central to analytical work and to interpreting any reported biological activity.
Laboratory detection of cardarine typically involves sample preparation followed by chromatographic separation and mass spectrometric identification. Urine is the most common matrix for anti-doping tests, though blood and hair have also been explored. Methods can target the parent compound or its metabolites, depending on the expected window of detection. Reference standards are required for accurate quantification. Matrix effects and dilution can influence results, so laboratories use internal standards and validation protocols. The exact detection window varies with dose, route, and individual metabolism.
A common misconception is that cardarine has been proven safe for human use. In reality, human clinical data are limited, and long-term animal studies have raised concerns about cancer. Another misconception is that it is a supplement or vitamin-like compound. It is a synthetic research chemical with no approved medical indication. Scientific discussion often focuses on its mechanism and detection rather than therapeutic use. Regulatory and anti-doping literature treats it primarily as a prohibited substance.
Cardarine is explicitly prohibited by the World Anti-Doping Agency under the class of PPARδ agonists. Its presence in urine or blood samples can be detected using mass spectrometry-based methods, often liquid chromatography-tandem mass spectrometry. Athletes who test positive may face sanctions, including bans from competition. The compound is also regulated as a prescription-only or unapproved drug in many countries. Enforcement varies by jurisdiction, and some regions treat it as a controlled substance. Online sales may occur despite these restrictions, creating quality and legal risks.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
Published literature on cardarine includes in vitro assays, rodent experiments, and a small number of human studies. Reports describe effects on exercise capacity and lipid metabolism in animals, while human evidence is sparse. Many online descriptions present the compound as a proven endurance aid, a claim not supported by regulatory approval or large clinical trials. Analytical studies focus on identifying the parent compound and its metabolites in biological samples. Important uncertainties include species differences, dose-response relationships, and the relevance of rodent tumor findings to humans.
Cardarine is the common name for GW501516, a synthetic compound studied as a peroxisome proliferator-activated receptor delta agonist. Researchers developed it to explore treatments for lipid disorders and metabolic conditions. It is not an approved medicine in any country. Early clinical work examined changes in HDL cholesterol and triglycerides, but development was discontinued after animal studies raised concerns about cancer. The compound remains available as a research chemical and appears in discussions of performance enhancement.
== Awards and honors == Csaba Horváth Medal of the Connecticut Separation Science Council (2001) Keene P. Dimick Award in Chromatography of the Society of Analytical Chemists of Pittsburgh (1998) Jubilee Award of the International Symposium on Capillary Chromatography (1998) Golden Diploma from Budapest Technical University (1995) Elected Honorary Member, Hungarian Chemical Society (1992) Marcel J. E. Golay Award of the International Symposium on Capillary Chromatography (1992) M. S. Tswett Medal of the Russian Chromatography Society (1991) Pioneer in the Development of Analytical Instrumentation of the first James L. Waters Symposium at the 41st PittCon (1990) National Award in Chromatography of the American Chemical Society (1985) A. J. P. Martin Gold Award of the Chromatography Discussion Group (1982) Anniversary Medal of Tartu University (Estonia, 1981) L.S. Palmer Award of the Minnesota Chromatography Forum (1980) Anniversary M.S. Tswett Chromatography Medal of the All-Union Scientific Council on Chromatography of the USSR Academy of Sciences (1979) M.S. Tswett Award in Chromatography of the International Symposium on Advances in Chromatography (1978)
=== Safety and toxicology === A number of cyanobacteria, of which spirulina is one, produce toxins such as microcystins. Some spirulina supplements have been found to be contaminated with microcystins, albeit at levels below the limit set by the Oregon Health Department. Microcystins can cause gastrointestinal upset, such as diarrhea, flatulence, headache, muscle pain, facial flushing, and sweating. Chronic exposure may lead to liver damage. The effects of chronic exposure to even low levels of microcystins are a concern due to the risk of toxicity to several organ systems. These toxic compounds are not produced by spirulina itself, but can occur if spirulina batches are contaminated with other, toxin-producing, blue-green algae. Because spirulina products are marketed as a dietary supplement, such products are made to the standards of processing and chemical purity of the manufacturer. Accordingly, spirulina supplements are regarded only as "possibly safe", provided they are free of microcystin contamination, and "likely unsafe" (especially for children) if contaminated. Public-health researchers have raised the concern that consumers cannot be certain that spirulina and other blue-green algae supplements are free of contamination. In 2016, a review by Health Canada of available literature found that spirulina products contained varying levels of microcystins. Health Canada restricts microcystin-LR levels in products containing cyanobacteria to 0.02 μg per kilogram of body weight per day in finished products, or a maximum of 1 part per million in raw materials.
== History == Insulin was introduced by Frederick Banting and Charles Best from the University of Toronto in 1921 as an injectable agent. Researchers first reported the concept of "smart insulin patch" in 2015. The prototype of smart insulin patch "was demonstrated as a continuous glucose control in a type 1 diabetic mouse model. As of 2019, glucose-responsive insulin patches are becoming more common. In 2020, scientists at UCLA and Zenomics Inc. developed "Smart Insulin Patch 2.0" and validated its feasibility in a diabetic minipig model. Currently, Zenomics is applying for U.S. Food and Drug Administration (FDA) approval for first-in-human trials and the technology has been accepted into the FDA's Emerging Technology Program.
After serving his suspension, Fletcher returned in 2017 to play suburban football for Essendon Doutta Stars. Fletcher was inducted into the Australian Football Hall of Fame in 2026, and is a Legend in the Essendon Hall of Fame, having been inducted in 2022.
Sources: en.wikipedia.org
Suppression of transthyretin production: Until 2018, liver and/or heart transplantation were the only ways to definitively treat TTR amyloidosis. Liver transplantation replaces the liver that is producing abnormal TTR proteins, and a heart transplantation replaces the heart with amyloid deposits for a non-diseased heart. Liver transplantation does not always halt the disease, and in some cases disease progression continues. Medications such as patisiran and inotersen can also decreases the activity of the transthyretin genes. These medications bind to the mRNA of transthyretin and prevent the production of the transthyretin protein, thus decreasing the overall amount of transthyretin that can accumulate in the body. Stabilization of abnormal transthyretin: There are medications that can stabilize the normally folded transthyretin, preventing misfolding and subsequent amyloid deposition. These medications include tafamidis, the non-steroidal anti-inflammatory drug (NSAID) diflunisal, and acoramidis. Tafamidis is a medication that binds to transthyretin and keeps it in its normal shape, stopping it from aggregating into amyloid fibrils. Diflunisal and acoramidis work in a similar manner to tafamidis in their ability to bind to and stabilize transthyretin. In a 30-month trial, tafamidis showed reduced mortality and reduced heart failure related hospitalizations compared to placebo. Tafamidis was also shown to improve functional capacity and quality of life in those with TTR amyloidosis.
== History == Romergoline was first described in the scientific literature in 1991. It was under development by Pharmacia Corporation, but its development was discontinued by the early 2000s and the drug was never marketed.
The United in Science 2022 report is published by the WMO, summarizing latest climate science-related updates and assessing recent climate change mitigation progress as "going in the wrong direction". 14 September A new deep learning technique enables year-round measurements of sea ice thickness in the Arctic. A research report by NewsGuard indicates there is a high level of online misinformation delivered – to a mainly young user base – with TikTok, whose usage is increasing. The WHO joins health associations and scientists in calling for a global fossil fuel non-proliferation treaty to protect lives of current and future generations.
Sources: en.wikipedia.org
== Environmental samples == A naturally occurring volatile that is sometimes found in aqueous solution is methane; water itself is semivolatile. Man-made or anthropogenic chemicals also occur in these classes. Examples of volatile anthropogenic chemicals include the refrigerants chlorofluorocarbons (CFCs) and hydrofluorocarbons (HCFCs). Semivolatile anthropogenics can exist as mixtures, such as petroleum distillates or as pure chemicals like trichloroethylene (TCE). Headspace gas chromatography offers a method for determining if there is natural biodegradation processes occurring in contaminated aquifers. For example, fuel hydrocarbons will break down into methane. Chlorinated solvents such as trichloroethylene, break down into ethene and chloride. Detecting these compounds can determine if biodegradation processes are occurring and possibly at what rate. Natural gas extracted from the earth also contains many low molecular weight hydrocarbon compounds such as methane, ethane, propane, and butane. For example, methane has been found in many water wells in West Virginia.
=== Red Star === 777 Partners bought Red Star FC of the French third-tier Championnat National in April 2022. The club was founded in 1897 by Jules Rimet, who was later president of FIFA. The takeover was met with backlash due to the club's working-class and left-wing history, and concerns that the club would become a farm team for 777's other assets. Former presidential candidate Jean-Luc Mélenchon was one of several politicians to sign a letter published in Le Monde, stating "For us, Red Star is a common good that cannot be sacrificed on the altar of profit." Éric Coquerel, the parliamentary deputy whose constituency includes Red Star's home of Saint-Ouen-sur-Seine, has campaigned for laws against multi-club ownership. Red Star won promotion to Ligue 2 in 2024.
A warm compress is a method of applying heat to the body. Heating sources can include warm water, microwaveable pads, wheat packs and electrical or chemical pads. Some unorthodox methods can include warmed potatoes, uncooked rice, and hard-boiled eggs. The most common warm compress is a warm, wet washcloth.
Pennington was born on October 8, 1872, in Nashville, Tennessee, to Henry and Sarah Malony Pennington. Shortly after her birth, her parents moved to Philadelphia to be closer to her mother's Quaker relatives. She became interested in chemistry at the age of 12 after reading a library book on medicinal chemistry. She walked to the University of Pennsylvania and asked a professor for help with the terminology she did not understand. She was told to come back when she was older. She entered the University of Pennsylvania in 1890 and completed the requirements for a B.S. degree in chemistry with minors in botany and zoology in 1892. However, since the University of Pennsylvania did not grant degrees to women at this time, she was given a certificate of proficiency instead of a degree. Pennington received her Ph.D. from the University of Pennsylvania in 1895. Her thesis was entitled "Derivatives of Columbium and Tantalum." From 1895 to 1896, she was a university fellow in botany at the University of Pennsylvania. She was a fellow in physiological chemistry at Yale University from 1897 to 1899, and conducted research with Lafayette Mendel and Russell Henry Chittenden.
Sources: en.wikipedia.org
No. Cardarine is GW501516, a PPARδ agonist, while SARMs act on androgen receptors. The two classes are often grouped in informal discussions despite different mechanisms.
No. It has no approved medical indication in any country. Regulatory agencies have not cleared it for treatment or prevention of any condition.
Early clinical work stopped after rodent carcinogenicity findings. Those animal results raised concerns about long-term human risk, although direct human evidence is lacking. The human relevance of the tumors remains an open scientific question.
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.