GW501516 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.
Last reviewed on 2026-06-05. Where a claim depends on a specific study, the study is described rather than over-claimed.
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 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.
| 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. |
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
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.
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
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.
Detoxification or detoxication (detox for short) is the physiological or medicinal removal of toxic substances from a living organism, including the human body, which is mainly carried out by the liver. Additionally, it can refer to the period of drug withdrawal during which an organism returns to homeostasis after long-term use of an addictive substance. In medicine, detoxification can be achieved by decontamination of poison ingestion and the use of antidotes as well as techniques such as dialysis and (in a limited number of cases) chelation therapy. Many alternative medicine practitioners promote various types of detoxification such as detoxification diets. Sense about Science, a UK-based charitable trust, determined that most such dietary "detox" claims lack any supporting evidence. The liver and kidney are naturally capable of detox, as are intracellular (specifically, inner membrane of mitochondria or in the endoplasmic reticulum of cells) proteins such as CYP enzymes. In cases of kidney failure, the action of the kidneys is mimicked by dialysis; kidney and liver transplants are also used for kidney and liver failure, respectively.
Mescaline use may rarely lead to hallucinogen-induced psychotic disorder (HIPD). HIPD is a type of substance-induced psychosis. Hallucinogen-induced psychotic disorder symptoms are psychosis with paranoia, delusions, hallucinations, or disorganized thinking that persist beyond the effects of the drug. HIPD due to psychedelics is most commonly seen with LSD use, but may also be caused by mescaline. Hallucinogen-induced psychotic disorder is a medical emergency. Without treatment, the psychotic state can continue for weeks or months. HIPD is treated with an atypical antipsychotic medication such as aripiprazole, quetiapine, olanzapine, or risperidone. Individuals with a personal or family history of mental health issues are at the highest risk for hallucinogen-induced psychotic disorder. The condition occurs in fewer than 1% of people with psychedelics.
=== Small proteins === Small proteins typically have a tertiary structure that is maintained by disulphide bridges (cysteine-rich proteins), metal ligands (metal-binding proteins), and or cofactors such as heme.
Tegileridine, sold under the brand name Aisute, is a drug which acts as a μ-opioid receptor agonist. It is closely related to compounds such as oliceridine, TRV734, and SHR9352, and shares a similar profile as a biased agonist selective for activation of the G protein signalling pathway over β-arrestin2 recruitment. In January 2024, tegileridine was approved in China under the brand name Aisute for the treatment of moderate to severe pain after abdominal surgery.
Sources: en.wikipedia.org
== Uses == Peroxydisulfuryl difluoride can be used to produce fluorosulfates. It is a strong oxidizing agent and can be used for the oxidation of noble metals (Ag Au Re Pt Os Rh) to the salts of fluorosulfuric acid.
Virtually all staple foods come either directly from primary production by plants, or indirectly from animals that eat them. Plants and other photosynthetic organisms are at the base of most food chains because they use the energy from the sun and nutrients from the soil and atmosphere, converting them into a form that can be used by animals. This is what ecologists call the first trophic level. The modern forms of the major staple foods, such as hemp, teff, maize, rice, wheat and other cereal grasses, pulses, bananas and plantains, as well as hemp, flax and cotton grown for their fibres, are the outcome of prehistoric selection over thousands of years from among wild ancestral plants with the most desirable characteristics. Botanists study how plants produce food and how to increase yields, for example through plant breeding, making their work important to humanity's ability to feed the world and provide food security for future generations. Botanists also study weeds, which are a considerable problem in agriculture, and the biology and control of plant pathogens in agriculture and natural ecosystems. Ethnobotany is the study of the relationships between plants and people. When applied to the investigation of historical plant–people relationships ethnobotany may be referred to as archaeobotany or palaeoethnobotany.
The α (alpha) subunit is 92 amino acids long. The β-subunit of hCG gonadotropin (beta-hCG) contains 145 amino acids, encoded by six highly homologous genes that are arranged in tandem and inverted pairs on chromosome 19q13.3 - CGB (1, 2, 3, 5, 7, 8). It is known that CGB7 has a sequence slightly different from that of the others. The two subunits create a small hydrophobic core surrounded by a high surface area-to-volume ratio: 2.8 times that of a sphere. The vast majority of the outer amino acids are hydrophilic. beta-hCG is mostly similar to beta-LH, with the exception of a Carboxy Terminus Peptide (beta-CTP) containing four glycosylated serine residues that is responsible for hCG's longer half-life.
Structure-based drug design attempts to use the structure of proteins as a basis for designing new ligands by applying the principles of molecular recognition. Selective high affinity binding to the target is generally desirable since it leads to more efficacious drugs with fewer side effects. Thus, one of the most important principles for designing or obtaining potential new ligands is to predict the binding affinity of a certain ligand to its target (and known antitargets) and use the predicted affinity as a criterion for selection. One early general-purposed empirical scoring function to describe the binding energy of ligands to receptors was developed by Böhm. This empirical scoring function took the form:
=== Cathodoluminescence === Cathodoluminescence is the most important tool paleontologists have for revealing whether or not the calcium in fossil eggshell has been altered. Calcite in eggshell is either pure or rich in calcium carbonate. However, the calcite composing the egg can be altered after burial to include significant calcium content. Cathodoluminescence causes calcite altered in this fashion to glow orange.
Sources: en.wikipedia.org
== Mechanism of action == Pentoxyverine is believed to suppress the cough reflex in the central nervous system, but the exact mechanism of action is not known with certainty. The drug acts as an antagonist at muscarinic receptors (subtype M1) and as an agonist at sigma receptors (subtype σ1) with an IC50 of 9 nM. Its anticholinergic properties can theoretically relax the pulmonary alveoli and reduce phlegm production. Spasmolytic and local anaesthetic properties have also been described. The clinical relevance of these mechanisms is uncertain.
=== Medical informatics, AI, and multimodal modeling === Several studies have focused on data standards and artificial intelligence using Truveta data. A 2023 preprint titled Truveta Mapper: A Zero-shot Ontology Alignment Framework presented a methodology for aligning biomedical ontologies using zero-shot learning, as a tool that could support data interoperability for health systems. A 2025 study published in Studies in Health Technology and Informatics explored structured large language model (LLM) augmentation for clinical information extraction, assessing its performance and potential for healthcare data analysis. In 2025, a study in Radiology Advances developed "XComposition", a multimodal deep-learning model that uses chest radiographs and clinical data to estimate body composition, as an application of large health-system data for medical imaging research.
Ford's article in the Encyclopedia of Chromatography, theoretical studies indicate that at least for some systems, optimized overloaded elution chromatography offers higher throughput than displacement chromatography, though limited experimental tests suggest that displacement chromatography is superior (at least before consideration of regeneration time).
=== Media coverage === The many murders which were carried out by the Moroccan mafia were a turning point in criminal journalism across Belgium and the Netherlands. Although the Moroccan mafia is not the first criminal phenomenon in these countries, it is the first to receive both international and intensive media coverage. The Dutch virtual tax reforms of the 2010s encouraged the emergence of inexpensive print media, which could therefore be widely distributed and relayed. These broadcasts were the precursors of a trend that gained momentum after the assassination of journalist Martin Kok in 2016. The Dutch newspaper De Telegraaf benefited greatly from the public enthusiasm for the criminal war that was taking place in its cities, which received unprecedented media coverage. While some Dutch media outlets decided to censor the first and last names of the editors who published articles, other news outlets like De Telegraaf did not give into the panic, and refused to practice censorship. After the attacks on De Telegraaf and Panorama in 2017, lawyer Christien Wildeman stated:
Compton had recently founded the American Research and Development Corporation (ARD) to spur the formation of new post-war industries. He introduced the founders to ARD's president, Georges Doriot. Doriot predicted the cancer treatment machines would be a commercial failure. Nevertheless, he perceived HVEC's leaders to be technically capable, and Compton persuaded him that ARD should have a startup with clear human benefits. Among more than 400 applications, Doriot selected the firm among ARD's first three investments. He offered the founders $200,000 in initial capitalization, leaving half the equity to them and their staff consultants. Compton arranged for HVEC to exclusively license MIT's Van de Graaff and Trump patents. Both Compton and Doriot served on the new company's board.
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.
Legal status varies by country. It is not approved as a medicine, and it is prohibited in sport. Some jurisdictions restrict import, sale, or possession.