This is a working overview of anti-doping, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-02-13 and is reviewed periodically as new material appears.
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.
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.
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.
| 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 |
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.
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
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.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
The compound is typically described as a laboratory compound rather than a therapeutic product. Published reports have explored its role in lipid disorders, insulin sensitivity, and exercise metabolism, yet no major drug regulator has approved it for medical use. Commercial samples sold under the cardarine name may vary in purity and identity. Analytical confirmation is therefore necessary when the material is discussed in scientific or regulatory contexts. Its classification as a prohibited substance in sport further shapes how it is studied and reported.
A partially collapsed framework can block access to pores; thereby reducing hydrogen uptake, and Lattice defects can create an intricate array of new pores and channels causing increased hydrogen uptake. Structural defects can also leave metal-containing nodes incompletely coordinated. This enhances the performance of MOFs used for hydrogen storage by increasing the number of accessible metal centers. Finally, structural defects can affect the transport of phonons, which affects the thermal conductivity of the MOF.
=== o-Ribosome === In 2005, three sets of ribosomes were published, which did not recognize natural mRNA, but instead translated a separate pool of orthogonal mRNA (o-mRNA). This was achieved by changing the recognition sequence of the mRNA, the Shine-Dalgarno sequence, and the corresponding recognition sequence in the 16S rRNA of ribosomes, the so-called Anti-Shine-Dalgarno-Sequence. This way the base pairing, which is usually lost if either sequence is mutated, stays available. However the mutations in the 16S rRNA were not limited to the obviously base-pairing nucleotides of the classical Anti-Shine-Dalgarno sequence.
is the elastic deformation/deflection. If the contacting bodies are approximated as linear elastic half spaces, the Boussinesq-Cerruti integral equation solution can be applied to express the deformation (
A survival store is a retail outlet where outdoor survival or preparedness equipment can be purchased. Typically survival stores stock camping and backpacking equipment, long-term storage food, fishing equipment, and occasionally bicycles.
Sources: en.wikipedia.org
== Etymology == The word "soy" derives from the Japanese soi, a Kagoshima dialect variant of shōyu, which in turn comes from the Chinese jiangyou (醬油), meaning "soy sauce". The name of the genus, Glycine, comes from Linnaeus. When naming the genus, Linnaeus observed that one of the species formerly within the genus, which has since been reclassified to the genus Apios, had a sweet root. Based on the sweetness, the Greek word for sweet, glykós, was Latinized.
Norrin and R-Spondin2 activate Wnt signaling in the absence of Wnt ligand. Interactions between Wnt signaling pathways also regulate Wnt signaling. As previously mentioned, the Wnt/calcium pathway can inhibit TCF/β-catenin, preventing canonical Wnt pathway signaling. Prostaglandin E2 (PGE2) is an essential activator of the canonical Wnt signaling pathway. Interaction of PGE2 with its receptors E2/E4 stabilizes β-catenin through cAMP/PKA mediated phosphorylation. The synthesis of PGE2 is necessary for Wnt signaling mediated processes such as tissue regeneration and control of stem cell population in zebrafish and mouse. Intriguingly, the unstructured regions of several oversized intrinsically disordered proteins play crucial roles in regulating Wnt signaling.
On 16 September 1994, the 82nd Airborne Division joined Operation Uphold Democracy. The 82nd was scheduled to make combat parachute jumps into Pegasus Drop Zone and PAPIAP Drop Zone (Port-au-Prince Airport), to help oust Raoul Cédras and to restore Jean-Bertrand Aristide to the presidency. At the same time, former US president Jimmy Carter and former chairman of the Joint Chiefs of Staff Colin Powell were negotiating with Cédras to restore Aristide to power, the 82nd's first wave was in the air, with paratroopers waiting at Green Ramp to air-land in Haïti once the airfields there had been seized. When the Haitian military verified from sources outside Pope Air Force Base that the 82nd was on the way, Cédras stepped down, averting the invasion. Former vice president Al Gore later travelled to Fort Bragg to personally thank the paratroopers of the 82nd for their actions, noting in a speech on 19 September 1994, that the 82nd's reputation was enough to change Cédras' mind:
== Ecology == All Russula species are ectomycorrhizal symbionts with higher plants and trees, and the genus has a collectively diverse host range. Some species are cosmopolitan and capable of forming associations with one or more hosts in a range of habitats, while others are more constrained in either host or habitat or both. The mycoheterotrophic plant Monotropa uniflora associates with a small range of fungal hosts, all of them members of Russulaceae, including 18 species of Russula. Russula fruit bodies provide a seasonal food source for slugs, squirrels and deer. Some russulas can bioaccumulate high levels of toxic metals from their environment. For example, Russula atropurpurea is capable of concentrating zinc, a property attributed to the presence of metallothionein-like peptides in the mushroom. Russula nigricans can accumulate lead to a level up to five times more concentrated than the soil it grows in, while R. ochroleuca concentrates environmental mercury. Fungi of this genus have been recorded as a main food of the pleasing fungus beetle Tritoma angulata. The related T.biguttata is also occasionally found on Russula, but it does not seem to be a regular food source for them.
ADP + phosphate + peptideout The 3 substrates of this enzyme are ATP, H2O, and peptide, whereas its 3 products are ADP, phosphate, and peptide. This enzyme belongs to the family of hydrolases, specifically those acting on acid anhydrides to catalyse transmembrane movement of substances. The systematic name of this enzyme class is ATP phosphohydrolase (peptide-exporting).
Sources: en.wikipedia.org
Bare lymphocyte syndrome Chronic granulomatous disease (Bridges–Good syndrome, chronic granulomatous disorder, Quie syndrome) Common variable immunodeficiency (acquired hypogammaglobulinemia) Complement deficiency DiGeorge syndrome (DiGeorge anomaly, thymic hypoplasia) Graft-versus-host disease Griscelli syndrome Hyper-IgE syndrome (Buckley syndrome, Job syndrome) Immunodeficiency with hyper-IgM Immunodeficiency–centromeric instability–facial anomalies syndrome (ICF syndrome) Isolated IgA deficiency Isolated primary IgM deficiency Janus kinase 3 deficiency Leukocyte adhesion molecule deficiency LIG4 syndrome Myeloperoxidase deficiency Neutrophil immunodeficiency syndrome Nezelof syndrome (thymic dysplasia with normal immunoglobulins) Omenn syndrome Purine nucleoside phosphorylase deficiency Severe combined immunodeficiency (alymphocytosis, Glanzmann–Riniker syndrome, severe mixed immunodeficiency syndrome, thymic alymphoplasia) Shwachman–Bodian–Diamond syndrome Thymoma with immunodeficiency (Good syndrome) Transient hypogammaglobulinemia of infancy Warts–hypogammaglobulinemia–infections–myelokathexis syndrome (WHIM syndrome) Wiskott–Aldrich syndrome X-linked agammaglobulinemia (Bruton syndrome, sex-linked agammaglobulinemia) X-linked hyper-IgM syndrome X-linked hypogammaglobulinemia X-linked lymphoproliferative disease (Duncan's disease) X-linked neutropenia
The CDC reported that the prevalence of obesity among U.S. adults aged 20 and over was 41.9% from 2017 to March 2020, with severe obesity at 9.2% during the same period. Prevalence was lowest among non-Hispanic Asian adults (17.4%), compared with non-Hispanic white (42.2%), non-Hispanic Black (49.6%), and Hispanic (44.8%) adults.
Early British political support for an increased Jewish presence in the region of Palestine was based upon geopolitical calculations. This support began in the early 1840s and was led by Lord Palmerston, following the occupation of Syria and Palestine by separatist Ottoman governor Muhammad Ali of Egypt. French influence had grown in Palestine and the wider Middle East, and its role as protector of the Catholic communities began to grow, just as Russian influence had grown as protector of the Eastern Orthodox in the same regions. This left Britain without a sphere of influence, and thus a need to find or create their own regional "protégés". These political considerations were supported by a sympathetic evangelical Christian sentiment towards the "restoration of the Jews" to Palestine among elements of the mid-19th-century British political elite – most notably Lord Shaftesbury. The British Foreign Office actively encouraged Jewish emigration to Palestine, exemplified by Charles Henry Churchill's 1841–1842 exhortations to Moses Montefiore, the leader of the British Jewish community. Such efforts were premature, and did not succeed; only 24,000 Jews were living in Palestine on the eve of the emergence of Zionism within the world's Jewish communities in the last two decades of the 19th century. With the geopolitical shakeup occasioned by the outbreak of the First World War, the earlier calculations, which had lapsed for some time, led to a renewal of strategic assessments and political bargaining over the Middle and Far East.
In 1660, German scientist Otto von Guericke studied static electricity by building a device comprising a large, rotating sulfur globe, now regarded as the first electrostatic generator. Sulfur appeared in the 1718 "affinity table" of the French chemist Étienne-François Geoffroy, a document that would become influential in chemistry works of the 18th century. Also present in that table was the so-called "Sulfur Principle": at the time, many chemists were convinced that sulfur was not a standalone element but instead contained multiple substances, including a distinct flammable one. This was supported by the phlogiston theory of combustion, which had emerged few decades prior; Geoffroy would later consider the sulfurous principle in his table to be phlogiston. Widely accepted for a century, phlogiston theory was debunked by the work of Antoine Lavoisier on combustion and oxygen. Antoine Lavoisier used sulfur in his combustion experiments, writing of some of these in 1777. In his 1789 Traité Élémentaire de Chimie, considered to be the first modern chemistry textbook, Lavoisier placed sulfur as its own chemical element in a "table of simple substances".
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.
Yes, WADA prohibits cardarine as a PPARδ agonist. It appears on the prohibited list and can be detected in urine or blood. Athletes using it risk sanctions.