A practical reference on PPARδ: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2025-08-13 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.
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.
Published human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
| 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. |
== Track listing == "Gone Fishing" - 3:46 "The Alphabet Song" - 4:07 "Another Girlfriend" - 3:01 "Paper Umbrella" - 4:17 "Unretractable Facts" - 3:29 "Play Fair" - 3:29 "The Wishbone" - 3:59 "Story With Only Two Characters" - 1:38 "Spilt Milk" - 4:56 "Moth To A Candle Flame" - 2:51 "Four Leaf Clover" - 4:39 "Shadow Of A Doubt" - 2:33 "Giant Steps (Bonus Track)" - 4:27
=== Transmission === Transmission is believed to occur most frequently through the shedding of viral particles into saliva. Both HHV-6B and HHV-7 are found in human saliva, the former being at a lower frequency. Studies report varying rates of prevalence of HHV-6 in saliva (between 3–90%), and have also described the salivary glands as an in vivo reservoir for HHV-6. The virus infects the salivary glands, establishes latency, and periodically reactivates to spread infection to other hosts. Vertical transmission has also been described, and occurs in approximately 1% of births in the United States. This form is easily identifiable as the viral genome is contained within every cell of an infected individual.
cytoplast An enucleated eukaryotic cell; or all other cellular components besides the nucleus (i.e. the cell membrane, cytoplasm, organelles, etc.) considered collectively. The term is most often used in the context of nuclear transfer experiments, during which the cytoplast can sometimes remain viable in the absence of a nucleus for up to 48 hours.
=== Oceania === Since the end of Australia’s Whitlam government, the Australian Labour Party (ALP) has moved towards centrist policies and Third Way ideals which are supported by the ALP's Right Faction members while the supporters of democratic socialism and social democracy lie within the ALP's Left Faction. There has been an increase in interest for socialism in recent years, especially among young adults. Interest is strongest in Victoria, where the Victorian Socialists party was founded. 2017-23 Prime Minister Jacinda Ardern of the democratic socialist New Zealand Labour Party, who has called capitalism a "blatant failure" due to the extent of homelessness in New Zealand, has been described and identified herself as democratic socialist. In Melanesia, Melanesian socialism was inspired by African socialism and developed in the 1980s. It aims to achieve full independence from Britain and France in Melanesian territories and creation of a Melanesian federal union. It is very popular with the New Caledonia independence movement.
Sources: en.wikipedia.org
Many researchers proposed that at the physiological pH, GHK-Cu complexes can form binary and ternary structures which may involve amino acid histidine and/or the copper binding region of the albumin molecule. Lau and Sarkar found also that GHK can easily obtain copper 2+ bound to other molecules such as the high affinity copper transport site on plasma albumin (albumin binding constant log 10 =16.2 vs. GHK binding constant 16 log 10 =16.44). It has been established that copper (II) redox activity is silenced when copper ions are complexed with the GHK tripeptide, which allows the delivery of non-toxic copper into the cell.
Diazepam increases the central depressive effects of alcohol, other hypnotics/sedatives (e.g., barbiturates), other muscle relaxants, certain antidepressants, sedative antihistamines, opioids, and antipsychotics, as well as anticonvulsants such as phenobarbital, phenytoin, and carbamazepine. The euphoriant effects of opioids may be increased, leading to an increased risk of psychological dependence. Cimetidine, omeprazole, oxcarbazepine, ticlopidine, topiramate, ketoconazole, itraconazole, disulfiram, fluvoxamine, isoniazid, erythromycin, probenecid, propranolol, imipramine, ciprofloxacin, fluoxetine, and valproic acid prolong the action of diazepam by inhibiting its elimination. Alcohol in combination with diazepam may cause a synergistic enhancement of the hypotensive properties of benzodiazepines and alcohol. Oral contraceptives significantly decrease the elimination of desmethyldiazepam, a major metabolite of diazepam. Rifampin, phenytoin, carbamazepine, and phenobarbital increase the metabolism of diazepam, thus decreasing drug levels and effects. Dexamethasone and St John's wort also increase the metabolism of diazepam. Diazepam increases the serum levels of phenobarbital. Nefazodone can cause increased blood levels of benzodiazepines. Cisapride may enhance the absorption, and therefore the sedative activity, of diazepam. Small doses of theophylline may inhibit the action of diazepam. Diazepam may block the action of levodopa (used in the treatment of Parkinson's disease). Diazepam may alter digoxin serum concentrations.
Peukert wrote that the popular claim, made after the war, that the Nazi regime stayed in power only because of terror was incorrect. Peukert wrote though terror played a role in sustaining the Nazi regime, the majority of victims of the violence of that the German state inflicted in the Nazi era tended to be people considered to be "outsiders" in Germany like Jews, the Romany, "Marxists", the mentally ill, the disabled, homosexuals, Jehovah's Witnesses, and the "asocial", and that for the most part, the state in the Nazi era left ordinary Germans alone to live their lives as they pleased. Peukert wrote with the "popular experience" of most Germans in the Nazi era, there were no clear-cut "villains and victims" with the American historian David Crew writing that Peukert had presented "a complex, morally disturbing picture" of ordinary people adjusting to what Peukert called "the multiple ambiguities of ordinary people". Peukert wrote that most ordinary Germans lived in a "grey zone" choosing support, accommodation and nonconformity at various times, never totally supporting the Nazi regime, but willing to accommodate themselves to the regime provided it served their own self-interests.
The English name of "Singapore" is an anglicisation of the native Malay name for the country, Singapura (Malay pronunciation: [siŋapura] ), which was in turn derived from the Sanskrit word for 'lion city' (Sanskrit: सिंहपुर; romanised: Siṃhapura; Brahmi: 𑀲𑀺𑀁𑀳𑀧𑀼𑀭; literally "lion city"; siṃha means 'lion', pura means 'city' or 'fortress'). Pulau Ujong was one of the earliest names for the island of Singapore, which corresponds to a Chinese account from the third century referred to a place as Pú Luó Zhōng (Chinese: 蒲 羅 中), a transcription of the Malay name for 'island at the end of a peninsula'. Early references to the name Temasek (or Tumasik) are found in the Nagarakretagama, a Javanese eulogy written in 1365, and a Vietnamese source from the same time period. The name possibly means Sea Town, being derived from the Malay tasek, meaning 'sea' or 'lake'. The Chinese traveller Wang Dayuan visited a place around 1330 named Danmaxi (Chinese: 淡馬錫; pinyin: Dànmǎxí; Wade–Giles: Tan Ma Hsi) or Tam ma siak, depending on pronunciation; this may be a transcription of Temasek, alternatively, it may be a combination of the Malay Tanah meaning 'land' and Chinese xi meaning 'tin', which was traded on the island. Variations of the name Siṃhapura were used for a number of cities throughout the region prior to the establishment of the Kingdom of Singapura. In Hindu–Buddhist culture, lions were associated with power and protection, which may explain the attraction of such a name.
The technology was originally developed by Elan Drug Technologies, a business unit of Elan Corporation, plc; Alkermes acquired the technology when it purchased Elan's drug delivery unit in 2011 for approximately $960 million. Nanocrystals of paliperidone palmitate form a depot or reservoir in the muscle. The 3-month formulation of paliperidone palmitate, Invega Trinza or Trevicta, has larger crystal sizes than the 1-month formulation, which dissolve more slowly at the injection site, allowing for its longer duration.
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.
Anti-doping and clinical laboratories commonly use liquid chromatography-tandem mass spectrometry. The method can identify GW501516 and its metabolites in urine or blood. Detection depends on sample timing and the amount present.