Everything below concerns PPARδ. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-07-30. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
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.
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.
| 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. |
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.
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.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
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.
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.
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.
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.
=== Synthesis and release === The corpus luteum produces the 6-kDa peptide hormone relaxin. Prolactin and insulin-like growth factor binding protein are two examples of the hormones and growth factors that relaxin can stimulate the secretion of. Preprorelaxin is the collective term for the signal peptide, B chain, C peptide, and A chain found in the coding area of human relaxin genes. The signal peptide is cleaved to produce prorelaxin. Prohormone convertases, such as prohormone convertase-1 and prohormone convertase-2, can convert prorelaxin to mature relaxin.
A period of rule under the Swedish House of Vasa began in the Commonwealth in the year 1587. The first two kings from this dynasty, Sigismund III (r. 1587–1632) and Władysław IV (r. 1632–1648), repeatedly attempted to intrigue for accession to the throne of Sweden, which was a constant source of distraction for the affairs of the Commonwealth. At that time, the Catholic Church embarked on an ideological counter-offensive and the Counter-Reformation claimed many converts from Polish and Lithuanian Protestant circles. In 1596, the Union of Brest split the Eastern Christians of the Commonwealth to create the Uniate Church of the Eastern Rite, but subject to the authority of the pope. The Zebrzydowski rebellion against Sigismund III unfolded in 1606–1608. Seeking supremacy in Eastern Europe, the Commonwealth fought wars with Russia between 1605 and 1618 in the wake of Russia's Time of Troubles; the series of conflicts is referred to as the Polish–Russian War or the Dymitriads. The efforts resulted in expansion of the eastern territories of the Polish–Lithuanian Commonwealth, but the goal of taking over the Russian throne for the Polish ruling dynasty was not achieved. Sweden sought supremacy in the Baltic during the Polish–Swedish wars of 1617–1629, and the Ottoman Empire pressed from the south in the Battles at Cecora in 1620 and Khotyn in 1621. The agricultural expansion and serfdom policies in Polish Ukraine resulted in a series of Cossack uprisings.
The 16th century Spanish missionary and naturalist José de Acosta noted the supposed aphrodisiac power of chilies, but wrote that they were harmful to people's spiritual health. In the 1970s, the government of Peru forbade prison inmates to consume chilies, their explanation being that these were "not appropriate for men forced to live a limited lifestyle."
=== Other conditions === Modafinil has been investigated for several other conditions with inconclusive or preliminary results. Preliminary research is examining modafinil for excessive daytime sleepiness in myotonic dystrophy, though it is not approved for this use and results are debated. Modafinil has also been studied for disorders of consciousness, but observational reports have produced mixed results.
=== 15 March === Hemedti vowed to carry out new offensives on March 17, the anniversary of the RSF's founding, claiming the RSF had undergone several changes and had made alliances with other groups such as the SPLM-N. He threatened to invade Port Sudan and attack Atbara, Shendi, Merowe, Al Dabbah, and Dongola. He also said that countries supporting the SAF would "pay the price". The bodies of 11 people suspected to have been killed by the RSF were recovered from a well in the Fayhaa neighborhood of Khartoum.
Sources: en.wikipedia.org
'FWACS' – Fellow of the West African College of Surgeons. Following award of fellowship, the Medical and Dental Council of Nigeria (MDCN) formally recognizes the individual as a specialist/consultant. Fellowship holders are eligible for appointment as consultant physicians, surgeons, dentists, or radiologists in teaching hospitals, federal medical centers, and tertiary institutions. They may also teach in universities and residency training programs or set up specialist private practices. Some specialties (e.g., Cardiology, Gastroenterology, Paediatric Surgery, Interventional Radiology) offer post-fellowship subspecialty training within or outside Nigeria. Increasingly, Nigerian-trained fellows pursue international fellowships or enroll in academic doctorate (PhD) programs, especially in research-intensive disciplines. The FWACP and FWACS are widely recognized across Anglophone West Africa. NPMCN and WACP/WACS fellowships are increasingly acknowledged in Europe, North America, and the Middle East, although individual recognition often requires equivalence assessments or registration with local medical councils (e.g., GMC in the UK). Many Nigerian-trained specialists have transitioned into international academic, clinical, or humanitarian roles, especially in underserved or diaspora communities. In South Africa, successful completion of residency leads to board certification as a specialist with the Health Professions Council and eligibility for fellowship of the Colleges of Medicine of South Africa.
== Cis/trans isomers of the peptide group == Significant delocalisation of the lone pair of electrons on the nitrogen atom gives the group a partial double-bond character. The partial double bond renders the amide group planar, occurring in either the cis or trans isomers. In the unfolded state of proteins, the peptide groups are free to isomerize and adopt both isomers; however, in the folded state, only a single isomer is adopted at each position (with rare exceptions). The trans form is preferred overwhelmingly in most peptide bonds (roughly 1000:1 ratio in trans:cis populations). However, X-Pro peptide groups tend to have a roughly 30:1 ratio, presumably because the symmetry between the Cα and Cδ atoms of proline makes the cis and trans isomers nearly equal in energy, as shown in the figure below.
Surface-loaded nanofiber scaffolds are useful as adhesion barriers between internal organs and tissues post-surgery. Adhesion occurs during the healing process and can bring on complications such as chronic pain and reoperation failure.
In the 1850s, "cholera and dysentery regularly ripped through communities, its victims often dying from debilitating diarrhoea", and dropsy, consumption, ague and rheumatism were all too common. An 1869 article in Scientific American describes a farmer growing and harvesting poppy in Indian Springs, Georgia, and subsequently selling the raw material to a local pharmacist who prepared laudanum.
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.
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.