If you have been reading about Anti-doping and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual description for typical solid reference material. |
| Solubility | Poorly soluble in water; soluble in DMSO | Solubility depends on solvent, purity, and form. |
| Storage | Cool, dry, protected from light | Long-term storage often uses low temperature and desiccant. |
| Common analytical method | LC-MS/MS | Used for detection and quantification in biological matrices. |
| Common synonyms | GW-501516; GW501516; endurobol | Naming varies among literature, vendors, and databases. |
PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.
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.
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 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.
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.
Miso soup (味噌汁 or お味噌汁, miso-shiru or omiso-shiru; お-/o- being honorific) is a traditional Japanese soup consisting of miso in a dashi stock. It is commonly served as part of an ichijū-sansai (一汁三菜) meal 'one soup, three dishes' consisting of rice, soup, and side dishes. Optional ingredients based on region and season may be added, such as wakame, tofu, negi, abura-age, and mushrooms. Along with suimono (clear soups), miso soup is one of the two basic soup types of Japanese cuisine. It is a representative of soup dishes served with rice. Miso soup is also called omiotsuke (御御御付) in some parts of Japan, especially around Tokyo.
== Career == In the 1990s, Laukien was a lecturer in NMR and mass spectrometry at the University of Bremen, Germany, and a part-time professor at the Institute of Mass Spectrometry of the University of Amsterdam, Netherlands. He has previously served on the Dean's Advisory Committee of the School of Science of MIT, and on the Board of the Analytical, Life Science & Diagnostics Association (ALDA), including one year as chairman. In 2017, he has been elected a senator of acatech, the German natural science and engineering academy. Laukien owns 24% of Bruker. As of October 2020, Forbes estimated his net worth at US$1.5 billion.
The Hong Kong Rugby Football Union was founded in 1953. Rugby is long established, partly as a result of its being a British colony. Hong Kong Sevens is held annually in Hong Kong and is considered the premier tournament on the World Rugby Sevens Series competition. Hong Kong national rugby union team is ranked 23rd in the world with a peak rating of 21st (2018–2022). Hong Kong is one of the best teams in Asia and has finished first place in the Asia Rugby Championship in 2018, 2019, 2022, 2023, 2024, and 2025. They qualified for the 2027 Rugby World Cup for the first time by winning the 2025 Asia Rugby Championship. The Hong Kong national rugby sevens team is widely regarded as the best rugby sevens team in Asia and a regular participant in the Rugby World Cup Sevens. Hong Kong has won the Asian Sevens Series a record 8 times and the Asian Games 2 times.
Ineffective erythropoiesis (red blood cell production) can lead to expansion of the bone marrow in compensation; this can then lead to deformity, bone pain, and craniofacial abnormalities. Organs such as the liver and spleen that can also become enrolled in red blood cell production, leading to hepatosplenomegaly (enlargement of the liver and spleen). People with thalassemia can get too much iron in their bodies, either from the disease itself as RBCs are destroyed, or as a consequence of frequent blood transfusions. Excess iron is not excreted, but forms toxic non-transferrin-bound iron. This can lead to organ damage, potentially affecting the heart, liver, endocrine system, bones and spleen. Symptoms include an irregular heartbeat, cardiomyopathy, cirrhosis of the liver, hypothyroidism, delayed puberty and fertility problems, brittle and deformed bones, and an enlarged spleen. For clinical purposes, thalassemia is categorised as either transfusion-dependent thalassemia (TDT) or non-transfusion-dependent thalassemia (NTDT) are used. Patients are usually considered as having NTDT if they have received fewer than 6 red blood cell units in the past 6 months and none in the preceding 2 months.
== Awards and affiliations == Smith a principal investigator at NIH Biomedical Technology Resource Center for Integrative Biology and the U.S. Department of Energy High Throughput Proteomics Facility at PNNL. He is an adjunct faculty member in the chemistry departments at Washington State University and the University of Utah and an affiliate faculty member Department of Chemistry at the University of Idaho and the Department of Molecular Microbiology & Immunology, Oregon Health & Science University. Smith serves on the Board of Scientific Counselors, Office of Public Health Preparedness and Response of the Centers for Disease Control and Prevention. He is also a Fellow of the American Association for the Advancement of Science, and has been elected to the Washington State Academy of Sciences. In 2011, Discover Magazine selected a peer-reviewed paper on Lyme disease that he coauthored with immunologist Steven Schutzer of the University of Medicine and Dentistry of New Jersey as one of the top 100 articles of the year, placing it at number 90. He was the recipient of the 2003 ACS award in Analytical Chemistry, the 2009 Human Proteome Organization (HUPO) Discovery Award in Proteomics Sciences, and was selected by R&D Magazine as the 2010 R&D Scientist of the Year.
Sources: en.wikipedia.org
Mutations may or may not produce detectable changes in the observable characteristics (phenotype) of an organism. Mutations play a part in both normal and abnormal biological processes including: evolution, cancer, and the development of the immune system, including junctional diversity. Mutation is the ultimate source of all genetic variation, providing the raw material on which evolutionary forces such as natural selection can act. Mutation can result in many different types of change in sequences. Mutations in genes can have no effect, alter the product of a gene, or prevent the gene from functioning properly or completely. Mutations can also occur in non-genic regions. A 2007 study on genetic variations between different species of Drosophila suggested that, if a mutation changes a protein produced by a gene, the result is likely to be harmful, with an estimated 70% of amino acid polymorphisms having damaging effects, and the remainder being either neutral or marginally beneficial. Mutation and DNA damage are the two major types of errors that occur in DNA, but they are fundamentally different. DNA damage is a physical alteration in the DNA structure, such as a single or double strand break, a modified guanosine residue in DNA such as 8-hydroxydeoxyguanosine, or a polycyclic aromatic hydrocarbon adduct. DNA damages can be recognized by enzymes, and therefore can be correctly repaired using the complementary undamaged strand in DNA as a template or an undamaged sequence in a homologous chromosome if it is available.
Many different names have been proposed over the years for this drug class. The famous German toxicologist Louis Lewin used the name phantastica earlier in this century, and as we shall see later, such a descriptor is not so farfetched. The most popular names—hallucinogen, psychotomimetic, and psychedelic ("mind manifesting")—have often been used interchangeably. Hallucinogen is now, however, the most common designation in the scientific literature, although it is an inaccurate descriptor of the actual effects of these drugs. In the lay press, the term psychedelic is still the most popular and has held sway for nearly four decades. Most recently, there has been a movement in nonscientific circles to recognize the ability of these substances to provoke mystical experiences and evoke feelings of spiritual significance. Thus, the term entheogen, derived from the Greek word entheos, which means "god within", was introduced by Ruck et al. and has seen increasing use. This term suggests that these substances reveal or allow a connection to the "divine within". Although it seems unlikely that this name will ever be accepted in formal scientific circles, its use has dramatically increased in the popular media and on internet sites. Indeed, in much of the counterculture that uses these substances, entheogen has replaced psychedelic as the name of choice and we may expect to see this trend continue.
They had planned to wed in summer 2020 but postponed the event twice due to the COVID-19 pandemic. At her wedding, Alizée wore the 1980s wedding dress belonging to Carole Middleton, her mother-in-law. The couple welcomed their first child, Inigo Gabriel, on 21 September 2023.
The reaction of Androstenedione [63-05-8] (1) with triethyl orthoformate convers the enone into the corresponding enol ether, 3-Ethoxyandrosta-3,5-dien-17-one [972-46-3] (2). Grignard addition of methyl magnesium halide gives (3). Catalytic hydrogenation reduces the C5=C6 olefin giving (4). Hydrolysis of the product in aqueous acid completed the synthesis of mestanolone (5).
Sources: en.wikipedia.org
=== Sources of toxicity === Diet – Liver is high in vitamin A. The liver of certain animals, including the polar bear, bearded seal, fish and walrus, are particularly toxic (see Liver (food) § Poisoning). It has been estimated that consumption of 500 grams (18 oz) of polar bear liver would result in an acute toxic dose for humans. Supplements – Dietary supplements can be toxic when taken above recommended dosages. Cod liver oil - According to the United States Department of Agriculture, a tablespoon (13.6 grams or 14.8 mL) of cod liver oil contains 4,080 μg of vitamin A. The tolerable upper intake level (UL) is 3000 μg/day for adults, 600 μg/day for children ages 1–3 years and 900 μg/day for children ages 4–8 years, so for all ages, but especially for young children, a tablespoon a day exceeds the UL.
== Treatment == There is no cure for VERBAS. In almost all cases, people with VERBAS are able to attend mainstream school with or without supports. Due to the lack of research and rareness of the disorder, there are no developed treatments for it and all treatments are symptomatic.
While the Treaties and Regulations will have direct effect (if clear, unconditional and immediate), Directives do not generally give citizens (as opposed to the member state) standing to sue other citizens. In theory, this is because TFEU article 288 says Directives are addressed to the member states and usually "leave to the national authorities the choice of form and methods" to implement. In part this reflects that directives often create minimum standards, leaving member states to apply higher standards. For example, the Working Time Directive requires that every worker has at least 4 weeks paid holidays each year, but most member states require more than 28 days in national law. However, on the current position adopted by the Court of Justice, citizens have standing to make claims based on national laws that implement Directives, but not from Directives themselves. Directives do not have so called "horizontal" direct effect (i.e. between non-state parties). This view was instantly controversial, and in the early 1990s three Advocate Generals persuasively argued that Directives should create rights and duties for all citizens. The Court of Justice refused, but there are five large exceptions. First, if a Directive's deadline for implementation is not met, the member state cannot enforce conflicting laws, and a citizen may rely on the Directive in such an action (so called "vertical" direct effect).
=== Environment === Deforestation in the Brazilian Amazon rainforest fell 61% in January 2023 from a year earlier following a series of anti-logging and anti-mining operations launched by government agencies under Lula, according to satellite data. In June 2023, the Environment Ministry announced a plan to curb deforestation in Brazil's Legal Amazon, and immediately embargoed all activities being developed inside conservation parks in the region. Additionally, the government announced the creation of 3 million hectares (7,413,161.44 acres) in protected areas until 2027/ the creation of tracking system using geopositioning for Amazon agricultural products and ecolabels were announced as well. In July 2023, deforestation in the Brazilian Amazon was reported to have fallen 34% over the previous six months while deforestation in the Brazilian Atlantic forest dropped 42% from January to May 2023 comparatively to the same period of time in 2022. In November 2023, Brazil's National Institute for Space Research (INPE) reported that the Amazon deforestation rate fell 22% between August 2022 and July 2023, compared to its previous 2021–2022 report (during Jair Bolsonaro's presidency). Considering only the period of the Lula government, the drop is accentuated to 49.7% compared to the same period of the previous year. Deforestation in protected areas fell the most, being the lowest in 9 years. In total, Imazon highlighted that 2023 had the lowest deforestation rate since 2017.
Aceclidine is a parasympathomimetic cholinergic drug that functions as a muscarinic acetylcholine receptor agonist. It is used in ophthalmology as a miotic agent to constrict the pupil. Historically used in Europe for the treatment of glaucoma, aceclidine received its first U.S. approval in 2025 under the brand name Vizz as a topical eye drop for the correction of presbyopia. Its mechanism of action produces pupil contraction with a relatively minimal effect on the ciliary muscle, which improves near visual acuity through a "pinhole" depth-of-field effect without inducing significant accommodative spasm.
Sources: en.wikipedia.org
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.
Most methods use liquid chromatography with tandem mass spectrometry. Urine is common in anti-doping testing, and blood or plasma may be used in research.
Typical guidance is cool, dry, dark storage, often at low temperature and with desiccant. Stability data are limited, so storage conditions should be verified for each batch or supplier.
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.