WADA comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2025-07-28. Numbers and descriptions here follow the published literature rather than marketing material.
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
Published studies have examined GW501516 in animal models of obesity, insulin resistance, and exercise endurance. Early human trials reportedly ended, and development was discontinued after preclinical findings raised concerns about cancer in some rodent studies. Regulatory agencies have not approved cardarine for any medical use. Its availability through non-pharmaceutical channels raises questions about identity, purity, and legal status that are separate from its laboratory pharmacology. Those questions are often addressed through analytical testing rather than assumptions about product labels.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport | Listed by WADA as a metabolic modulator. |
| Approved medical use | None in major jurisdictions | Not a registered drug. |
| Common test matrix | Urine | Most anti-doping samples use urine. |
| Typical detection method | LC-MS/MS | Detects parent compound and metabolites. |
| Reference standard storage | -20 °C, desiccated | Typical for analytical standards. |
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.
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.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
The pharmacological interest in cardarine centers on PPARδ activation and its downstream effects on lipid handling and mitochondrial function. In animal studies, PPARδ agonists have been associated with changes in exercise endurance and fatty acid utilization, though results vary by model and protocol. Human data remain sparse, and the absence of large controlled trials limits conclusions about efficacy. Researchers often describe the compound as a tool for probing PPARδ biology rather than a proven therapeutic agent.
=== Wallets === A number of technologies known as wallets exist that store the key value pair of private and public key known as wallets. A wallet hosts the details of the key pair making cryptocurrency transactions possible. Multiple methods exist for storing keys or seeds in a wallet. A brainwallet or brain wallet is a type of wallet in which one memorizes a passcode (a private key or seed phrase). Brainwallets may be attractive due to plausible deniability or protection against governmental seizure, but are vulnerable to password guessing (especially large-scale offline guessing). Several hundred brainwallets exist on the Bitcoin blockchain, but most of them have been drained, sometimes repeatedly.
=== Firing of employee that filed suit (2010) === A federal lawsuit was filed by a scientist claiming she got an infection by a genetically modified lentivirus while working for Pfizer, resulting in intermittent paralysis. A judge dismissed the case citing a lack of evidence that the illness was caused by the virus but the jury ruled that by firing the employee, Pfizer violated laws protecting freedom of speech and whistleblowers and awarded her $1.37 million.
== Pharmacokinetics in humans == A study was conducted to define the pharmacological response of humans to ractopamine. A single oral dose of 40 mg of ractopamine hydrochloride was given to human volunteers. The drug was rapidly absorbed; the mean blood plasma half-life was around 4 hrs and it was not detected in plasma 24 hrs after dosing. Less than 5% of total ractopamine excreted represented the parent drug, while the urinary metabolites were monoglucuronide and monosulfate conjugates, with ractopamine monosulfate being the major metabolite present. The metabolic fate of ractopamine hydrochloride is similar in the target species (pigs and cattle), laboratory animals, and humans. Besides the pharmacology effect, ractopamine may cause intoxication effect; therefore, any consumption by humans of a meat and/or byproducts of animals that consumed ractopamine with feed for growth stimulation, may result in such clinical effects as tachycardia and other heart rate increases, tremor, headache, muscle spasm, or high arterial blood pressure.
== Archaeology and paleontology == In archaeology, the Maillard process occurs when bodies are preserved in peat bogs. The acidic peat environment causes a tanning or browning of skin tones and can turn hair to a red or ginger tone. The chemical mechanism is the same as in the browning of food, but it develops slowly over time due to the acidic action on the bog body. It is typically seen on Iron Age bodies and is the result of the interaction of anaerobic, acidic, and cold (typically 4 °C (39 °F)) sphagnum acid on the polysaccharides. The Maillard reaction also contributes to the preservation of paleofeces.
The RCC implemented social reform measures, adopting sharia as a basis. Consumption of alcohol was prohibited, night clubs and Christian churches were shut down, traditional Libyan dress was encouraged, and Arabic was declared the only language permitted in official communications and on road signs. The RCC doubled the minimum wage, introduced statutory price controls, and implemented compulsory rent reductions of between 30 and 40 per cent. Gaddafi also wanted to combat the strict social restrictions imposed on women by the previous regime, establishing the Revolutionary Women's Formation to encourage reform. In 1970, a law was introduced affirming equality of the sexes and wage parity. In 1971, Gaddafi sponsored the creation of a Libyan General Women's Federation. In 1972, a law was passed criminalizing the marriage of any females under the age of sixteen and making women's consent a prerequisite for marriage. Gaddafi's regime created a wide range of educational and employment opportunities for women, although these primarily benefited a minority in the urban middle-classes.
Sources: en.wikipedia.org
=== Re–Ru === Lynne Regan (Ph.D. 1987). British biochemist and biotechnologist at the University of Edinburgh which studies interactions between proteins and nucleic acids. Jens Reich (b. 1939). German biophysicist at the Central Institute of Molecular Biology of the Academy of Sciences in Berlin-Buch, pioneer in systems biology. Founder of the New Forum (civil rights movement). Jacques Ricard (1929–2018). French biochemist at the Institut Jacques Monod known for studies of plant enzymes and for developing the concept of enzyme memory. David Rittenberg (1906–1970). American biochemist at Columbia, a pioneer in the use of radioactive tracers to study metabolism. Member Natl. Acad. Sci. USA. Alexander Rich (1924–2015). American biophysicist at MIT, whose many contributions included elucidation of the structure of collagen (with Francis Crick). Member Natl. Acad. Sci. USA. Jane S. Richardson (b. 1941). American biophysicist at Duke University, known for the ribbon diagram, a method of representing the 3D structures of proteins. Member Natl. Acad. Sci. USA. Thorburn Brailsford Robertson (1884–1930), Australian physiologist and biochemist, known for promoting the use of insulin for diabetes in Australia. Dame Carol V. Robinson (b. 1956), British chemist and mass spectroscopist at the University of Oxford known for studies of protein folding. Robert G. Roeder (b. 1942), American biochemist, pioneer in eukaryotic transcription. Irwin Rose (1926–2015). American biochemist at the University of Pennsylvania, noted for the discovery of ubiquitin-mediated protein degradation.
== Signs and symptoms == Generally, fractures are a result of traumatic injury, underlying pathology, or overuse. Fractures are painful though there are no pain receptors in the bone. This is a result of damage to the periosteum and endosteum, hematoma formation, soft tissue injury, and contraction of nearby muscle groups in response to disturbed anatomy. Physical signs include obvious deformity, inability to bear weight or use the limb, bruising, and swelling.
=== Remote influence on tropical Atlantic Ocean === A study of climate records has shown that El Niño events in the equatorial Pacific are generally associated with a warm tropical North Atlantic in the following spring and summer. About half of El Niño events persist sufficiently into the spring months for the Western Hemisphere Warm Pool to become unusually large in summer. Occasionally, El Niño's effect on the Atlantic Walker circulation over South America strengthens the easterly trade winds in the western equatorial Atlantic region. As a result, an unusual cooling may occur in the eastern equatorial Atlantic in spring and summer following El Niño peaks in winter. Cases of El Niño-type events in both oceans simultaneously have been linked to severe famines related to the extended failure of monsoon rains.
Litvinenko in 2006, and was suspected as a possible cause of Yasser Arafat's death, following exhumation and analysis of his corpse in 2012–2013. The radioisotope may also have been used to kill Yuri Shchekochikhin, Lecha Islamov and Roman Tsepov.
Sources: en.wikipedia.org
Legal status varies by country, but cardarine is not approved as a medicine in major jurisdictions. It is often sold as a research chemical, a category that may not be lawful for human use. Buyers should check local laws and product labels carefully.
Anti-doping laboratories use LC-MS/MS to detect GW501516 and its metabolites, usually in urine. The method can identify the parent compound at low concentrations. Detection windows vary with dose and individual factors.
No, cardarine has no approved medical uses in major jurisdictions. Early research explored metabolic conditions, but those programs were discontinued. It is not a registered treatment for any disease.
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.