If you have been reading about PPARδ agonist 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.
Last reviewed on 2025-10-06. Where a claim depends on a specific study, the study is described rather than over-claimed.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
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.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
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.
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 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.
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.
== History == The name magnesium originates from the Greek word for locations related to the tribe of the Magnetes, either a district in Thessaly called Magnesia or Magnesia ad Sipylum, now in Turkey. It is related to magnetite and manganese, which also originated from this area, and required differentiation as separate substances. See the manganese article for this history. In 1618, a farmer at Epsom in England attempted to give his cows water from a local well. The cows refused to drink because of the water's bitter taste, but the farmer noticed that the water seemed to heal scratches and rashes. The substance obtained by evaporating the water became known as Epsom salts and its fame spread. It was eventually recognized as hydrated magnesium sulfate, MgSO4·7 H2O. The metal itself was first isolated by Sir Humphry Davy in England in 1808. He used electrolysis on a mixture of magnesia and mercuric oxide. Antoine Bussy prepared it in coherent form in 1831. Davy's first suggestion for a name was 'magnium', but the name magnesium is now used in most European languages. Further discoveries about magnesium were made by the father of physical chemistry in Imperial Russia, Nikolai Beketov (1827–1911), who established that magnesium and zinc displaced other metals from their salts under high temperatures.
=== Diffusive === Some materials may merge at the joint by diffusion. This may occur when the molecules of both materials are mobile and soluble in each other. This would be particularly effective with polymer chains where one end of the molecule diffuses into the other material. It is also the mechanism involved in sintering. When metal or ceramic powders are pressed together and heated, atoms diffuse from one particle to the next. This joins the particles into one.
It had been reported during the season that he had appeared disenchanted as the supplements scandal continued to heavily impact on the club, and in their Round 19 loss to Greater Western Sydney, Carlisle was reported to have yelled "This club is fucked" as he walked to the interchange bench. In October 2015, after much deliberation, Carlisle nominated St Kilda over Carlton as the club he wished to be traded to from Essendon. He was officially traded to St Kilda on 21 October. During his first pre-season with St Kilda, Carlisle and 33 other players who were at Essendon were found guilty of using a banned performance-enhancing substance, thymosin beta-4, as part of Essendon's sports supplements program during the 2012 season. He and his team-mates were initially found not guilty in March 2015 by the AFL Anti-Doping Tribunal, but a guilty verdict was returned in January 2016 after an appeal by the World Anti-Doping Agency. He was suspended for two years which, with backdating, ended in November 2016; as a result, he served approximately fourteen months of his suspension and missed the entire 2016 AFL season. He had also received a two-match internal suspension at St Kilda after footage emerged of him using recreational drugs, but the club later waived it, determining that it was served concurrently with the season-long ban. Carlisle played all 22 games in his first proper season at St Kilda in 2017, following the trade and suspension. The Saints finished mid-table that year with 11 wins and 11 losses.
Common adverse effects (2.4–42%) included agitation or irritability, tachycardia, hallucinations or delusions, confusion, pupil dilation, hypertension, drowsiness or lethargy, elevated creatine phosphokinase (CPK), nausea and vomiting, and others. Selected serious adverse effects included fever or hyperthermia in 3.8%, single seizure in 2.4%, coma in 1.4%, elevated creatinine in 1.4%, multiple seizures in 1.2%, rhabdomyolysis in 1.1%, respiratory depression in 0.9%, cardiac conduction disorder in 0.5%, and status epilepticus in 0.4%. There is a case report of severe neurological sequelae following a single typical recreational dose of LSD involving seizure and cardiorespiratory arrest. In general, psychedelics like LSD may rarely cause seizures in some individuals. The median lethal dose (LD50) of LSD in animals varies and is 50 to 60 mg/kg in mice, 16.5 mg/kg in rats, and 0.3 mg/kg in rabbits all given by injection. A well-known 1962 instance of an elephant named Tusko given 297 mg (~0.1 mg/kg) LSD by intramuscular injection proved fatal. These findings suggest that elephants may be much more sensitive to LSD in overdose than humans and other species. However, this instance has been mired in criticism and controversy due to miscalculation of LSD dose and concomitant post-LSD administration of promazine and pentobarbital. The experiment was repeated in two elephants with similar doses of LSD in 1984 without incident. Massive doses of LSD are largely managed by symptomatic treatments, and agitation can be addressed with benzodiazepines.
Jones were able to determine the structure of diiron nonacarbonyl, which is produced from iron pentacarbonyl by the action of sunlight. After Mond, who died in 1909, the chemistry of metal carbonyls fell for several years in oblivion. BASF started in 1924 the industrial production of iron pentacarbonyl by a process which was developed by Alwin Mittasch. The iron pentacarbonyl was used for the production of high-purity iron, so-called carbonyl iron, and iron oxide pigment. Not until 1927 did A. Job and A. Cassal succeed in the preparation of chromium hexacarbonyl and tungsten hexacarbonyl, the first synthesis of other homoleptic metal carbonyls. Walter Hieber played in the years following 1928 a decisive role in the development of metal carbonyl chemistry. He systematically investigated and discovered, among other things, the Hieber base reaction, the first known route to metal carbonyl hydrides and synthetic pathways leading to metal carbonyls such as dirhenium decacarbonyl. Hieber, who was since 1934 the Director of the Institute of Inorganic Chemistry at the Technical University of Munich published in four decades 249 papers on metal carbonyl chemistry.
Sources: en.wikipedia.org
An analogue, asarone, is more potent than myristicin, elemicin, or safrole in producing hypnotic-like effects in rodents. Asarone is a natural precursor to the psychedelic amphetamine TMA-2, which is substantially more potent as a psychedelic drug than analogues like TMA and mescaline. Asarone is present in Acorus calamus and this root has limited reports of producing stimulant- and psychedelic- or LSD-like effects in humans. However, Shulgin reported that pure asarone produced no effects whatsoever at doses of up to 70 mg orally. For comparison, TMA-2 produces threshold effects at a dose of 10 mg orally and its typical or effective dose range is 20 to 40 mg orally. In accordance with Shulgin's findings, no psychoactive effects were reported and TMA-2 was not detected in a clinical series of Acorus calamus poisonings.
== Energy release == The Q value is defined as the total energy released in a given nuclear decay. In beta decay, Q is therefore also the sum of the kinetic energies of the emitted beta particle, neutrino, and recoiling nucleus. (Because of the large mass of the nucleus compared to that of the beta particle and neutrino, the kinetic energy of the recoiling nucleus can generally be neglected.) Beta particles can therefore be emitted with any kinetic energy ranging from 0 to Q. A typical Q is around 1 MeV, but can range from a few keV to a few tens of MeV. Since the rest mass of the electron is 511 keV, the most energetic beta particles are ultrarelativistic, with speeds very close to the speed of light. In the case of 187Re, the maximum speed of the beta particle is only 9.8% of the speed of light. The following table gives some examples:
== History == Spontaneous vertebral artery dissection was described in the 1970s. Prior to this, there had been isolated case reports about carotid dissection. In 1971, C. Miller Fisher, a Canadian neurologist and stroke physician working at Massachusetts General Hospital, first noted the "string sign" abnormality in carotid arteries on cerebral angiograms of stroke patients, and subsequently discovered that the same abnormality could occur in the vertebral arteries. He reported the discovery in a paper in 1978.
While this process depletes glutathione initially, it paradoxically stimulates increased glutathione synthesis. The compound's anti-proliferative effects appear particularly pronounced in cancer cells with compromised mitochondrial function, suggesting a relationship between mitochondrial fitness and therapeutic efficacy.
Sources: en.wikipedia.org
=== Operational names === Most of the coalition states used various names for their operations and the war's operational phases. These are sometimes incorrectly used as the conflict's overall name, especially the US Desert Storm:
== Applications == Enteropeptidase's specificity makes it an ideal tool in biochemical applications; a fusion protein containing a C-terminal affinity tag (such as poly-His) linked by this sequence can be cleaved by enteropeptidase to obtain the target protein following protein purification. On the converse, the N-terminal pro-sequence of proteases that must be cleaved prior to activation can be mutated to enable activation with enteropeptidase.
A December 2023 Gallup poll found a record low 28% of Americans reporting that they were satisfied with the way democracy is working in the country. In the weeks before the election, surveys showed that many favored a concession speech from the losing presidential candidate, had broad concerns about the state of democracy and were fearful of future acts of political violence. Surveys from the National Election Pool and VoteCast highlight the role the issue of democracy played in the election. According to results provided by the National Election Pool, 34% percent of voters said that the state of democracy mattered most to their vote. The poll found that 25% of those who cast a ballot said that democracy in the U.S. is secure, while 73% said it is threatened. VoteCast found that half of voters identified the future of democracy as the single most important factor for their vote. 9 in 10 Harris voters who said that democracy was the single most important factor expressed concern that electing Trump would bring the country closer to authoritarianism. About 80% of Trump voters who chose democracy as their top issue expressed concern about a Harris presidency becoming authoritarian.
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
No. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.