The short version of metabolite fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2026-06-08 and is reviewed periodically as new material appears.
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.
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.
Cardarine is a common name for GW501516, a synthetic compound studied for its effects on lipid and glucose metabolism. It functions as an agonist at peroxisome proliferator-activated receptor delta, or PPARδ, a nuclear receptor that influences gene expression. The molecule is not a steroid, nor is it a selective androgen receptor modulator. It is also known in research and sports literature as GW-501516 and endurobol. Early laboratory work examined its metabolic activity in cell cultures and animal models.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport; not approved as medicine | Listed by WADA at all times. |
| Common synonyms | GW501516, GW-501516, endurobol | Cardarine is a colloquial name. |
| Typical analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Common test matrix | Urine | Blood and dried blood spots also possible. |
| Legal classification | Varies by country | Often treated as unapproved drug or research chemical. |
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.
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.
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
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.
=== Substrate specificity === Octopine dehydrogenase has at least two structural characteristics that contribute to substrate specificity. Upon binding to NADH, amino acid residues lining either side of the active site within the space between the domains of OcDH act as a "molecular ruler", physically limiting the size of the substrates that can fit into the active site. There is also a negatively charged pocket in the cleft between the two domains that acts an "electrostatic sink" that captures the positively charged side-chain of L-arginine.
At the end of the twentieth century, the world was at a major crossroads. Throughout the century, more technological advances had been made than in all of preceding history. Computers, the Internet, and other technologies radically altered daily lives. However, several problems faced the world during the Cold War period and the 1990s that followed. First of all, the gap between rich and poor nations continued to widen. Some said that this problem could not be fixed, arguing that there was a set amount of wealth and it could only be shared by so many. Others claimed that powerful nations with large economies were not doing enough to help improve the rapidly evolving economies of the Third World. Developing countries faced many challenges, including the scale of the task to be surmounted, rapidly growing populations, and the need to protect the environment, along with the associated costs. Secondly, disease threatened to destabilize many regions of the world. Viruses such as West Nile and Avian influenza continued to spread quickly and easily. In poor nations, malaria and other diseases affected the majority of the population. Millions were infected with HIV, the virus that causes AIDS, which was becoming an epidemic in southern Africa and around the world. Increased globalization, specifically Americanization, was also occurring. While not necessarily a threat, it was causing anti-Western and anti-American feelings in parts of the world, especially in the Middle East.
=== Dependence and withdrawal === Physical dependence can develop with long-term clonidine use, and abrupt discontinuation can cause a withdrawal syndrome marked by a pronounced rebound increase in blood pressure. Symptoms of clonidine withdrawal include a marked rise in blood pressure with symptoms such as headache, sweating, insomnia, agitation, tremor, palpitations, nervousness, and nausea. Among dependent individuals, the severity of drug withdrawal appears to be significantly more pronounced in people with pre-existing hypertension and after prolonged treatment at higher doses (i.e., >900 mcg/day), and severe cases (hypertensive encephalopathy, stroke, and death) have been reported albeit rarely. The severity of withdrawal symptoms is attenuated by tapering the dose.
(Sponsored by The Association of Schools of Public Health (ASPH). Eaton DL & Cui J. (2023) "Biotransformation of Xenobiotics ", in Patty's Industrial Hygiene and Toxicology, 7th Edition, Ed. D. Paustenbach, J. Klaunig, L. Levy & H. Greim, Wiley Press. e91320 Eaton, DL, *Vandivort, TC & Gallagher, EP. (2025). Introduction to the Principles of Toxicology, In: Comprehensive Toxicology, C. McQueen, Editor, Elsevier Sciences, Vol. 1, General Principles, 4 th, Edition, Chap. 1, 2025. Eaton, D. L., Goldstein, B. D. & Henifin, M. S. (2025). Reference Guide on Toxicology. In Reference Manual on Scientific Evidence (4th ed., pp. 1027-1104–686). National Academies Press / Federal Judicial Center.
Sources: en.wikipedia.org
=== Alpha === Alpha motor neurons target extrafusal muscle fibers. The motor nerves associated with these neurons innervate extrafusal fibers and are responsible for muscle contraction. These nerve fibers have the largest diameter of the motor neurons and require the highest conduction velocity of the three types.
Haemoglobin is an oxygen-binding protein, found in erythrocytes, which transports oxygen from the lungs (or in the foetus, from the placenta) to the tissues. Each molecule of haemoglobin comprises 4 protein subunits, referred to as globins. Normally, humans have:-
After experiencing patella tendinitis in his knee during 2016, Hibberd was eased back into pre-season training. In addition to sustaining a hamstring injury which limited his training further and he was forced to miss the opening match of the 2017 JLT Community Series. He played his first match in Melbourne colours in Melbourne's second match of the JLT Community Series, which was a fifty-four point win against Carlton at Casey Fields. A few days later, he suffered an achilles injury at training, which forced him to miss five weeks of football. He returned to playing via the VFL with Melbourne's affiliate team, the Casey, in the round one clash against Williamstown at Burbank Oval, in which he recorded twenty-five disposals and was one of Casey's best players according to elite performance manager, Dave Misson. He spent just the one week in the VFL before making his debut for Melbourne in the Anzac Day eve match against Richmond at the Melbourne Cricket Ground in round five where he recorded twenty-seven disposals, eight rebound 50s, six marks and a goal. He was named Melbourne's best player by Herald Sun journalist, Sam Landsberger, and was named in AFL Media's team of the week. He played every match for the remainder of the season to finish with eighteen games and averaged career-highs in disposals (27.4) and rebound 50s (6.8), the latter of which ranked second in the league; furthermore he averaged the highest metres gained per match (545.7) in the league.
President Trump signed the Tax Cuts and Jobs Act into law in December 2017. CBO forecasts that the 2017 Tax Act will increase the sum of budget deficits (debt) by $2.289 trillion over the 2018-2027 decade, or $1.891 trillion after macro-economic feedback. This is in addition to the $10.1 trillion increase forecast under the June 2017 policy baseline and existing $20 trillion national debt. The Tax Act will reduce spending for lower income households while cutting taxes for higher income households, as CBO reported on December 21, 2017: "Overall, the combined effect of the change in net federal revenue and spending is to decrease deficits (primarily stemming from reductions in spending) allocated to lower-income tax filing units and to increase deficits (primarily stemming from reductions in taxes) allocated to higher-income tax filing units." CBO forecast in January 2017 (just prior to Trump's inauguration) that revenues in fiscal year 2018 would be $3.60 trillion if laws in place as of January 2017 continued. However, actual 2018 revenues were $3.33 trillion, a shortfall of $270 billion (7.5%) relative to the forecast. This difference is primarily due to the Tax Act. In other words, revenues would have been considerably higher in the absence of the tax cuts. The New York Times reported in August 2019 that: "The increasing levels of red ink stem from a steep falloff in federal revenue after Mr. Trump's 2017 tax cuts, which lowered individual and corporate tax rates, resulting in far fewer tax dollars flowing to the Treasury Department.
Relamorelin (INN, USAN) (developmental code names RM-131, BIM-28131, BIM-28163) is a synthetic peptide, centrally penetrant, selective agonist of the ghrelin/growth hormone secretagogue receptor (GHSR) which is under development by Allergan pharmaceuticals for the treatment of diabetic gastroparesis, chronic idiopathic constipation, and anorexia nervosa. It is a pentapeptide and an analogue of ghrelin with improved potency and pharmacokinetics. In humans, relamorelin produces increases in plasma growth hormone, prolactin, and cortisol levels, and, like other GHSR agonists, increases appetite. As of June 2015, relamorelin is in phase II clinical trials for diabetic gastroparesis and constipation. The United States Food and Drug Administration (FDA) has granted Fast Track designation to relamorelin for diabetic gastroparesis. The development of the drug is uncertain as the most recent mention of it was in a 2019 SEC filing from the drug manufacturer lists the drug's expected launch year as 2024, but not in subsequent filings or press releases.
Sources: en.wikipedia.org
Psilocybe cubensis, commonly known as the magic mushroom, shroom, golden halo, cube, gold cap, or bluestain smoothcap, is a species of psilocybin mushroom of moderate potency whose principal active compounds are psilocybin and psilocin. It belongs to the fungus family Hymenogastraceae and was previously known as Stropharia cubensis. It is the best-known psilocybin mushroom due to its wide distribution and ease of cultivation.
In the late 19th century anorexia nervosa became widely accepted by the medical profession as a recognized condition, with mentions in the medical literature notably arising from the Salpêtrière clinic in Paris by physicians such as Jean-Martin Charcot. Awareness of the condition was largely limited to the medical profession until the latter part of the 20th century, when German-American psychoanalyst Hilde Bruch published The Golden Cage: the Enigma of Anorexia Nervosa in 1978. Despite major advances in neuroscience, Bruch's theories tend to dominate popular thinking. A further important event was the death of the popular singer and drummer Karen Carpenter in 1983, which prompted widespread ongoing media coverage of eating disorders.
This was the seventh time Pakistan has carried out airstrikes in Afghanistan since the Afghan Taliban took over in August 2021. The Taliban-led Afghan government condemned the strikes as a "blatant violation of Afghanistan's territorial integrity" and a breach of international law, stating that they hit civilian homes, a religious seminary, and other civilian structures, killing at least 18 people (including women and children) and leaving others missing under rubble. In addition, one family in Girdi Kas lost 18 of 23 members, and additional casualties were reported in Paktika. Afghan officials vowed an "appropriate and measured response" at a suitable time. On 24 February, the hostilities resumed as both countries exchanged fire along their borders while both sides blamed each other for provocations. Zabihullah Noorani, head of the Afghan information department in eastern Nangarhar, stated that Pakistani troops carried out the first shots in the Shahkot area near the border. Pakistan claimed that its forces retaliated in response to a mortar and rocket from Afghanistan on Jarobi Kandao area of the Zakhakhel tehsil, with skirmishes later spreading to Wragha, Maro Sar, Shahkot and Zakhakhel. Pakistan also claimed that Taliban initiated 'unprovoked firing" in Torkham and Tirah. Both light and heavy weapons were used in skirmishes in Nazyan and Achin. An Afghan militant was killed during an infiltration attempt across the border in North Waziristan District.
==== Dehydration ==== To combat dehydration, sufficient fresh drinking water should be provided. Here, too, you can try to increase the cat's voluntary water intake by adding meat broth or tuna juice. Switching to wet food also often leads to increased fluid intake. Dehydrated cats or animals with volume deficiency require fluid administration with correction of electrolytes. Renal azotemia cannot be influenced in this way. The administration of sterile infusion solutions under the skin by the owner must be viewed critically. These also ultimately enter the vascular system and conventional infusion solutions inevitably lead to a permanent excess of sodium. This form of treatment should therefore only be carried out if the condition and hydration status improve and there are no disturbances in blood pressure or potassium levels. Infusion solutions for cats in stage IV should contain a maximum of 40 mmol/L sodium and about 13 mmol/L (max. 30 mmol/L) potassium (half-electrolyte solution with potassium substitution).
== Research == Cyclofenil was investigated as a possible treatment for scleroderma in the 1980s, but was found to be ineffective. Later study of its efficacy in treating Raynaud's phenomenon in people with scleroderma also found no significant benefit.
Sources: en.wikipedia.org
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.
Laboratories use liquid chromatography-tandem mass spectrometry to detect GW501516 and its metabolites. Urine is commonly tested, and testing can occur in and out of competition.
No, cardarine is not a SARM. It is a PPARδ agonist, which acts on a different receptor. The two classes are often confused in online discussions.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.