A practical reference on PPARδ agonist: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-01-09. Anything still debated is marked as such rather than presented as settled.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human therapeutic use | No marketing authorization identified in major jurisdictions. |
| Anti-doping class | PPARδ agonist; hormone and metabolic modulators | Listed on the WADA Prohibited List. |
| Common test matrix | Urine | Also blood and tissue in research settings. |
| Typical analytical method | LC-MS/MS | Targets parent compound and metabolites. |
| Major safety signal | Tumor findings in rodents | Human relevance not established; limited human data. |
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.
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.
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 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.
TikTok's and Douyin's censorship policies have been criticized as non-transparent. Internal guidelines against the promotion of violence, separatism, and "demonization of countries" could be used to prohibit content related to the 1989 Tiananmen Square protests and massacre, Falun Gong, the Cambodian genocide, the 1998 Indonesian riots, Kurdish nationalism, ethnic conflicts between blacks and whites or between different Islamic sects, and independence movements in Tibet, Taiwan, Chechnya and Northern Ireland. A more specific list banned criticisms against world leaders, including past and present ones from Russia, the United States, Japan, North and South Korea, India, Indonesia, and Turkey. In 2019, The Guardian reported that TikTok had censored videos of topics not favored by the Chinese government. That year, TikTok took down a video about human rights abuses in the Xinjiang internment camps against Uyghurs but restored it after 50 minutes as well as the creator's account, saying that the action was a mistake and triggered by a brief "satirical" image of Osama bin Laden in another post. Other human rights activists have also said that their TikTok videos discussing human rights violations of the Uyghurs have been taken down. TikTok moderators were instructed to suppress posts from "For You" recommendations if the users shown were deemed "too ugly, poor, or disabled". The consumption of alcohol, full or partial nudity, LGBT, and intersex contents were restricted even in places where they are legal.
== Used carrier proteins == Keyhole limpet hemocyanin It is copper-containing respiratory protein, isolated from keyhole limpets (Megathura crenulata). Because of its evolutionary distance from mammals, high molecular weight and complex structure it is usually immunogenic in vertebrate animals. Concholepas concholepas hemocyanin (also blue carrier immunogenic orotein) It is alternative to KLH isolated from Concholepas concholepas. It has the similar immunogenic properties as KLH but better solubility and therefore better flexibility. Bovine serum albumin It is from the blood sera of cows and has similarly immunogenic properties as KLH or CCH. The cationized form of BSA (cBSA) is highly positively charged protein with significantly increased immunogenicity. This change possesses a greater number of possible conjugated antigens to the protein. Ovalbumin Also known as egg albumin, OVA is the main protein (60-75%) found in hen egg white. OVA is soluble in dimethyl sulfoxide (DMSO), which enables the conjugation of haptens that are not soluble in aqueous buffers. The immune response can be enhanced using an adjuvant injected together with the immunogen.
Interstate 65 to Gary (near Chicago) and Indianapolis US 52. A junction of U.S. Route 52 and Interstate 65 is located in the northwest part of Lebanon, and the two routes are concurrent through most of the city. State Road 32 to Crawfordsville and Muncie State Road 39 to LaPorte and Martinsville Airports The Boone County Airport is located 2 nautical miles (2.3 mi; 3.7 km) southeast of Lebanon's central business district. The nearest commercial airport which currently has scheduled airline service is Indianapolis International Airport (IND), located approximately 32 miles (51 km) south of Lebanon. Railroads and Trails CSX provides freight rail service in Lebanon. The Lebanon Business Park located in the southwest part of the city is designated a CSX Select Site; CSX constructed a rail spur directly into the business park. The Lafayette and Indianapolis Railroad line traversing Lebanon was owned and operated by a number of companies from its inception in 1852 until it was abandoned in 1985. Portions of the former railroad line have been re-purposed as a shared use path currently known as Big 4 or Farm Heritage Trail. A trailhead is located at Sam Ralston Road east of Interstate 65 in Lebanon, and the trail extends 9.5 miles (15.3 km) from this point northwest to Thorntown.
Trichilia catigua is a flowering plant species in the genus Trichilia. The species is used in folk medicine and shamanism in the aphrodisiac and stimulant catuaba. Cinchonain-Ib is a flavonolignan found in the bark of T. catigua. Catuaba from Trichilia catigua was found to increase the release of Serotonin as well as Dopamine in rats. Additionally, Trichilia catigua was shown to have neuroprotective effects in rats.
Sources: en.wikipedia.org
=== Origins === LLNL was established in 1952, as the University of California Radiation Laboratory, Livermore Branch, an offshoot of the existing University of California Radiation Laboratory at Berkeley. The lab at Livermore was intended to spur innovation and provide competition to the nuclear weapon design laboratory at Los Alamos in New Mexico, home of the Manhattan Project that developed the first atomic weapons. The Livermore facility was co-founded by Edward Teller and Ernest Lawrence, director of the Radiation Laboratory at Berkeley. The new laboratory was sited at a former naval air station from World War II. It was already home to several University of California Radiation Laboratory projects that were too large for its location in the Berkeley Hills above the UC campus, including one of the first experiments in the magnetic approach to confined thermonuclear reactions (i.e. fusion). About half an hour southeast of Berkeley, the Livermore site provided much greater security for classified projects than an urban university campus. Lawrence tapped his former graduate student Herbert York, age 32, to run Livermore. Under York, the Lab had four main programs: Project Sherwood (the magnetic-fusion program), Project Whitney (the weapons-design program), diagnostic weapon experiments (both for the Los Alamos and Livermore laboratories), and a basic physics program. York and the new lab embraced the Lawrence "big science" approach, tackling challenging projects with physicists, chemists, engineers, and computational scientists working together in multidisciplinary teams.
3-phosphoglycerate can be separated and measured using paper chromatography as well as with column chromatography and other chromatographic separation methods. It can be identified using both gas-chromatography and liquid-chromatography mass spectrometry and has been optimized for evaluation using tandem MS techniques. 2-Phosphoglyceric acid Calvin-Benson cycle Photosynthesis Ribulose 1,5-bisphosphate
Calcium isotope fractionation during mineral formation has led to several applications of calcium isotopes. In particular, the 1997 observation by Skulan and DePaolo that calcium minerals are isotopically lighter than the solutions from which the minerals precipitate is the basis of analogous applications in medicine and in paleoceanography. In animals with skeletons mineralised with calcium, the calcium isotopic composition of soft tissues reflects the relative rate of formation and dissolution of skeletal mineral. In humans, changes in the calcium isotopic composition of urine have been shown to be related to changes in bone mineral balance. When the rate of bone formation exceeds the rate of bone resorption, the 44Ca/40Ca ratio in soft tissue rises and vice versa. Because of this relationship, calcium isotopic measurements of urine or blood may be useful in the early detection of metabolic bone diseases like osteoporosis. A similar system exists in seawater, where 44Ca/40Ca tends to rise when the rate of removal of Ca2+ by mineral precipitation exceeds the input of new calcium into the ocean. In 1997, Skulan and DePaolo presented the first evidence of change in seawater 44Ca/40Ca over geologic time, along with a theoretical explanation of these changes. More recent papers have confirmed this observation, demonstrating that seawater Ca2+ concentration is not constant, and that the ocean is never in a "steady state" with respect to calcium input and output. This has important climatological implications, as the marine calcium cycle is closely tied to the carbon cycle.
Sources: en.wikipedia.org
No. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.
It is classified as a PPARδ agonist on the WADA Prohibited List. Anti-doping laboratories can detect it and its metabolites in urine. Its use is banned in competition and usually out of competition.
Rodent studies reported increased tumor incidence at multiple sites. The human relevance remains uncertain, but the findings contributed to discontinuation of development. No long-term human cancer data are available.
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.