prohibited list raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-12-11. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport | Listed by WADA as a PPARδ agonist. |
| Typical detection matrix | Urine | Most common sample for anti-doping analysis. |
| Common analytical method | LC-MS/MS | Liquid chromatography-tandem mass spectrometry. |
| Common synonyms | GW501516, GSK-516, endurobol | Names found in research and fitness contexts. |
| Typical detection window | Variable | Depends on dose, route, and individual metabolism. |
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.
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.
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.
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.
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.
=== Laser ablation electrospray ionization === Laser ablation electrospray ionization (LAESI) mass spectrometry is an ambient ionization technique applicable to plant and animal tissue imaging, live-cell imaging, and most recently to cell-by-cell imaging. This technique uses a mid-IR laser to ablate the sample which creates a cloud of neutral molecules. This cloud is then hit with the electrospray from above to cause ionization. The desorbed ions are then able to pass into the mass spectrometer for analysis. This method is also good for imaging in applications. The analyses can be desorbed through a pulsed laser irradiation without the need of a matrix. This method is best used with small organic molecules up to larger biomolecules as well.
office Chris Iijima (1969), legal scholar, folksinger Andrei Markovits (1969), professor of comparative politics at the University of Michigan Michel Rosenfeld (1969), constitutional law scholar Mark Rosenzweig (1969), professor of economics at Yale University Steven M. Cohen (1970), sociologist, director of Berman Jewish Policy Archive at NYU's Robert F. Wagner Graduate School of Public Service Sheldon Danziger (1970), political scientist at the University of Michigan Lennard J. Davis (1970), professor of English at the University of Illinois at Chicago, specialist in disability studies John D'Emilio (1970), professor of history and gender studies at the University of Illinois at Chicago; winner of the Bill Whitehead Award in 2013 Samuel Estreicher (1970), professor at the New York University School of Law Peter Grossman (1970), professor of economics at Butler University; columnist, The Indianapolis Star Robert A. Leonard (1970), forensic linguist at Hofstra University and former member of rock band Sha Na Na Michael P. Mezzatesta (1970), art historian, director of the Nasher Museum of Art 1987–2003 Paul Starr (1970), sociologist; co-founder of The American Prospect and winner of the 1984 Pulitzer Prize for General Nonfiction Paul Berman (1971), historian and social critic Philip Nord (1971), historian and professor at Princeton University Steven J.
=== Passive products === Generally, these products are indicated for only superficial, clean, and dry wounds with minimal exudates. They can also be used as secondary dressings (additional dressings to secure the primary dressing in place or to absorb additional discharge from the wound). Examples are: Gauze, lint, adhesive bandage (plasters), and cotton wool. The main aim is to protect the wound from bacterial contamination. They are also used for secondary dressing. Gauze dressing is made up of woven or non-woven fibres of cotton, rayon, and polyester. Gauze dressing are capable of absorbing discharge from wound but requires frequent changing. Excessive wound discharge would cause the gauze to adhere to the wound, thus causes pain when trying to remove the gauze from the wound. Bandages are made up of cotton wool, cellulose, or polyamide materials. Cotton bandages can act as a secondary dressing while compression bandages provides good compressions for venous ulcers. On the other hand, tulle gras dressing which is impregnated with paraffin oil is indicated for superficial clean wound.
Sources: en.wikipedia.org
Stickleback fish have repeatedly moved between marine and freshwater environments, with widespread convergent evolution to adapt and readapt to these environments in different species. Flying fish can fly up to 400 m (1,300 ft) at speeds of more than 70 kilometres per hour (43 mph) at a maximum altitude of more than 6 m (20 ft), much like other flying birds, bats and other gliders. Extinct fish of the family Thoracopteridae, like Thoracopterus or Potanichthys, were similar to modern flying fish (gliding ability thanks to enlarged pair of pectoral fins and a deeply forked tail fin) which is not, however, considered to be their descendant. The cleaner wrasse Labroides dimidiatus of the Indian Ocean is a small, longitudinally-striped black and bright blue cleaner fish, just like the cleaner goby Elacatinus evelynae of the western Atlantic. The fish of the now discredited genus Stylophthalmus are only distantly related, but their larvae (Stomiiformes and Myctophiformes) have developed similar, stalked eyes. (see: Stylophthalmine trait) Sawfish (a group of rays related to guitarfish), unrelated sawsharks (a group of sharks), and the extinct sawskates (another group of rays related to modern skates) all convergently evolved a saw-like rostrum with sharp transverse teeth for hunting. This evolutionary process has been named "pristification". Underwater camouflage is found independently in many fish like: leafy seadragon (large part of its body is just for camouflage), pygmy seahorse, leaf scorpionfish, flounder, peacock flounder.
=== Haemophilus influenzae type b (Hib) infection === Naturally acquired disease caused by H. influenzae seems to occur in humans only. In healthy children under the age of 5, H. influenzae type b was responsible for more than 80% of aggressive infections, before the introduction of the [Hib] vaccine. In infants and young children, H. influenzae type b (Hib) causes bacteremia, pneumonia, epiglottitis and acute bacterial meningitis. On occasion, it causes cellulitis, osteomyelitis, and infectious arthritis. It is one cause of neonatal infection. Due to routine use of the Hib vaccine in the US since 1990, the incidence of invasive Hib disease has decreased to 1.3/100,000 in children. However, Hib remains a major cause of lower respiratory tract infections in infants and children in developing countries where the vaccine is not widely used. Unencapsulated H. influenzae strains are unaffected by the Hib vaccine and cause ear infections (otitis media), eye infections (conjunctivitis), and sinusitis in children, and are associated with pneumonia.
Recent economic growth has led to a considerable increase of new millionaires, including the new entrepreneurs, Colombians with a net worth exceeding US$1 billion. In 2017, however, the National Administrative Department of Statistics (DANE) reported that 26.9% of the population were living below the poverty line, of which 7.4% were in "extreme poverty". The multidimensional poverty rate stands at 17.0 percent of the population. The Government has also been developing a process of financial inclusion within the country's most vulnerable population. The contribution of tourism to GDP was US$5,880.3bn (2.0% of total GDP) in 2016. Tourism generated 556,135 jobs (2.5% of total employment) in 2016. Foreign tourist visits were predicted to have risen from 0.6 million in 2007 to 4 million in 2017.
Ozarelix (developmental code names D-63153, SPI-153) is a peptide gonadotropin-releasing hormone antagonist (GnRH antagonist) which is or was under development by AEterna Zentaris Inc. and Spectrum Pharmaceuticals as a long-acting injection formulation for the treatment of prostate cancer. It has also been investigated for the treatment of endometriosis, but no development has been reported. The drug was previously under investigation for the treatment of benign prostatic hyperplasia and Alzheimer's disease as well, but development for these indications was discontinued. As of June 2015, it was in phase II clinical trials for prostate cancer. It seems to no longer be under development.
Sources: en.wikipedia.org
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.
Detection usually uses liquid chromatography-tandem mass spectrometry after sample cleanup. Laboratories look for the parent compound or metabolites. The method requires validated reference standards and controls.
Legality varies by country. In many places it is an unapproved drug and cannot be legally sold for human consumption. Purchasing from online vendors carries legal and quality risks.
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.