PPARδ is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Updated 2025-10-31. Numbers and descriptions here follow the published literature rather than marketing material.
Regulatory treatment varies, but cardarine is not approved as a medicine. Sports authorities list GW501516 as a prohibited substance, and it is banned at all times under the World Anti-Doping Agency code. Many countries restrict sales for human consumption, while online vendors market it as a research chemical. Such products may lack purity data, and their actual contents can differ from the label. Purchasing or possessing cardarine may carry legal consequences depending on jurisdiction. The compound is not a dietary supplement ingredient in regulated markets.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
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.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516; GW-1516; endurobol | GW501516 is the research code |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator |
| Molecular formula | C21H18F3NO3S2 | Established chemical formula |
| Molar mass | 453.5 g/mol | Calculated from the formula |
| Regulatory status | Prohibited in sport; not approved as medicine | Status varies by country |
Literature on cardarine often separates receptor pharmacology from toxicology. Mechanistic papers describe PPARδ activation and gene expression changes, while safety assessments focus on carcinogenicity and species differences. Questions remain about whether rodent tumors arise through PPARδ-dependent or off-target mechanisms. Another open area is how human metabolism and exposure compare with those in animal studies. Analytical methods such as liquid chromatography–mass spectrometry are used to confirm identity in biological and product samples.
GW501516 acts as an agonist at the peroxisome proliferator-activated receptor delta, a nuclear receptor that regulates gene expression. Activation shifts transcription toward genes involved in fatty acid uptake, oxidation, and energy expenditure. The compound does not bind the androgen receptor and therefore differs from anabolic steroids and SARMs. In rodent models, this metabolic shift has been linked to increased running endurance and reduced fat accumulation. The exact downstream pathways in humans remain incompletely characterized.
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.
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.
Stability of GW501516 depends on form, temperature, light exposure, and moisture. Solid reference material is typically stored frozen or refrigerated in a desiccator and protected from light. Solutions in organic solvents such as dimethyl sulfoxide are often kept frozen in aliquots to reduce freeze-thaw cycling. Aqueous solubility is low, so aqueous stock solutions can be difficult to prepare without cosolvents. Degradation may appear as changes in chromatographic purity or mass spectral signal. Stability studies are needed to establish shelf life for any specific preparation.
Quality assessment for cardarine samples usually combines identity, purity, and impurity testing. Nuclear magnetic resonance spectroscopy and mass spectrometry can confirm molecular structure, while high-performance liquid chromatography estimates purity. Certificates of analysis from testing laboratories may list these results, but they do not establish safety or legality. In the absence of approved manufacturing, products sold online may contain the wrong compound, variable amounts, or unlisted contaminants. Independent verification is therefore central to analytical work and to interpreting any reported biological activity.
Laboratory detection of GW501516 commonly uses liquid chromatography coupled with tandem mass spectrometry. The method can identify the parent compound or its metabolites in urine and blood after sample cleanup. Protein precipitation, solid-phase extraction, or enzymatic hydrolysis may precede analysis, depending on the matrix. Reference standards are required for accurate quantification and confirmation. Because the compound is not approved, testing often occurs in anti-doping, forensic, or research settings rather than routine clinical care. Results are reported with limits of detection and quantification.
=== Antihypertensive agents === Antihypertensive agents comprise multiple classes of compounds that are intended to manage hypertension (high blood pressure). Antihypertensive therapy aims to maintain a blood pressure goal of <140/90 mmHg in all patients, as well as to prevent the progression or recurrence of cardiovascular diseases (CVD) in hypertensive patients with established CVD. An optimal blood pressure control is essential to prevent target-organ damage associated with complications of hypertension such as heart failure, ischemic heart diseases, stroke, and renal failure, ultimately reducing the risk of premature mortality. Antihypertensives are classified by different mechanisms or sites of action. Some of the most commonly used drugs to treat hypertension include diuretics, angiotensin-converting enzyme inhibitors (ACEI), angiotensin II receptor blockers (ARBs), calcium channel blockers (CCBs), and beta-blockers.
April 30: Decree dismissing "useless" women (prostitutes) from armies. June 10–11: Decree on communal property division, allowing women and men over 21 to participate and vote in assemblies. June 24: Constitution of Year I denies women citizenship rights. June 28: Decree on annual aid for children, the elderly, and the indigent, mandating districts to provide secret housing for pregnant girls to give birth, with confidentiality and funded care (children born become wards of the nation); free childbirth care for indigent women, mandatory breastfeeding (except for medical reasons) for indigent families, with financial aid. August 24: Married women's annuities and interest remain theirs but are paid directly to husbands. October 30: Decree banning women's political clubs and societies. December 19: Decree mandating state-organized compulsory primary education for girls and boys aged 6–8. 1794
Infected dogs carry the highest bacterial load of B. canis after 1-6 months after infection. Infected neutered animals are not able to display reproductive symptoms, however both intact and neutered dogs are able to shed B. canis in urine. This means that both neutered and intact dogs are able to transmit the disease via urine. B. canis is found to be localized in the prostate of male dogs, thus transmitting through the urine in both intact and neutered males. It has been suggested that male dogs carry higher concentrations of the bacteria when compared to female dogs due contamination from seminal fluid. Neutered dogs are also capable of shedding the bacteria in their saliva and nasal secretions. B. canis is the least common cause of Brucellosis in humans. Transmission to humans is rarely diagnosed but is possible. It can be transmitted via bodily fluids and aborted material. Signs and symptoms are very non-specific, such as fever, joint pain, and fatigue. The disease can also be debilitating, causing conditions such as endocarditis, splenomegaly, or neurologic symptoms.
=== Bibliography === "Annex A – Estate Baseline – 2009" (PDF). Defence Estates Development Plan (DEDP) 2009. GOV.UK (Report). Ministry of Defence. 3 July 2009. Retrieved 30 March 2023. Halley, James J (1988). RAF Squadrons. The Squadrons of the Royal Air Force & Commonwealth 1918–1988. Tonbridge, UK: Air Britain (Historians). ISBN 0-85130-164-9. Jackson, Paul (1986). Britain's Armed Forces Today: 4 RAF Germany. Shepperton, UK: Ian Allan. ISBN 0-7110-1579-1. Jefford, C. G. (1988). RAF Squadrons. A comprehensive record of the movement and equipment of all RAF squadrons and their antecedents since 1912. Shrewsbury, UK: Airlife. ISBN 1-85310-053-6. Langford, F. (1991). The Dorset Year Book - 1991. Dorset, UK: The Society Of Dorset Men. March, Peter R. (1992). Royal Air Force Yearbook 1992. Fairford, UK: Royal Air Force Benevolent Fund. March, Peter R. (1998). Royal Air Force Yearbook 1998. Fairford, UK: Royal Air Force Benevolent Fund. Sturtivant, Ray; Hamlin, John (2007). Royal Air Force flying training and support units since 1912. Tonbridge, UK: Air-Britain (Historians). ISBN 978-0851-3036-59.
1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC, EDAC or EDCI) is a water-soluble carbodiimide usually handled as the hydrochloride, which is a white solid. It is typically employed in the 4.0-6.0 pH range. It is generally used as a carboxyl activating agent for the coupling of primary amines to yield amide bonds. While other carbodiimides like dicyclohexylcarbodiimide (DCC) or diisopropylcarbodiimide (DIC) are also employed for this purpose, EDC has the advantage that the urea byproduct formed (often challenging to remove in the case of DCC or DIC) can be washed away from the amide product using dilute acid. Additionally, EDC can also be used to activate phosphate groups in order to form phosphomonoesters and phosphodiesters. Common uses for this carbodiimide include peptide synthesis, protein crosslinking to nucleic acids, but also in the preparation of immunoconjugates. EDC is often used in combination with N-hydroxysuccinimide (NHS) for the immobilisation of large biomolecules. Recent work has also used EDC to assess the structure state of uracil nucleobases in RNA.
Sources: en.wikipedia.org
One way to effectively deal with the inherent multi-physics and the control systems development that is involved when including intelligent systems, is to adopt the V-Model approach to systems development, as has been widely used in the automotive industry for twenty years or more. In this V-approach, system-level requirements are propagated down the V via subsystems to component design, and the system performance is validated at increasing integration levels. Engineering of mechatronic systems requires the application of two interconnected "V-cycles": one focusing on the multi-physics system engineering (like the mechanical and electrical components of an electrically powered steering system, including sensors and actuators); and the other focuses on the controls engineering, the control logic, the software and realization of the control hardware and embedded software.
Multiple studies done both in and outside India have shown an increased prevalence of pseudocholinesterase deficiency amongst the Arya Vysya community. A study performed in the Indian state of Tamil Nadu in Coimbatore on 22 men and women from this community showed that 9 of them had butyrylcholinesterase deficiency, which translates to a prevalence that is 4000-fold higher than that in European and American populations. Butyrylcholinesterase deficiency is common within the Persian and Iraqi Jewish populations. Approximately one in 10 Persian Jews are known to have a mutation in the gene causing this disorder and thus one in 100 couples will both carry the mutant gene and each of their children will have a 25% chance of having two mutant genes, and thus be affected with this disorder. This means that one out of 400 Persian Jews is affected with this condition. Cholinesterase Test - Lab Tests Online
ADAM17 is an 824-amino acid polypeptide. ADAM17 has multidomain structure that includes a pro-domain, a metallo-protease domain, a disintegrin domain, a cysteine-rich domain, an EGF-like domain, a transmembrane domain, and a cytoplasmic tail. The metalloprotease domain is responsible for the enzyme's catalytic activity, cleaving membrane-bound proteins, including cytokines like TNF-alpha, to release their soluble forms. The disintegrin and cysteine-rich domains are implicated in cell adhesion and interaction with integrins, while the transmembrane domain anchors the protein in the membrane. The cytoplasmic tail is involved in intracellular signaling and protein-protein interactions. ADAM17's activity is tightly regulated through multiple mechanisms, including the removal of its pro-domain and interactions with regulatory proteins such as TIMPs (tissue inhibitors of metalloproteinases).
24. Semaglutide. Drugs and Lactation Database (LactMed®) [Internet]. Bethesda (MD): National Institute of Child Health and Human Development; 2006–. 2026 Aug 15. Semaglutide was not detectable in the milk of mothers taking the drug subcutaneously. Their breastfed infants experienced no adverse effects. Some brands of oral semaglutide, such as Rybelsus, contain the absorption enhancer salcaprozate sodium, which may enter milk and accumulate in infants. Only injectable forms of semaglutide should be used during breastfeeding. Some experts recommend closely monitoring of infant growth and developmental milestones and the nutritional status of the lactating woman.[1]
== Diseases == One thousand mutations have been identified in 12 out of more than 20 types of collagen. These mutations can lead to various diseases at the tissue level. Osteogenesis imperfecta – Caused by a mutation in type 1 collagen, a dominant autosomal disorder, results in weak bones and irregular connective tissue; some cases can be mild while others can be lethal. Mild cases have lowered levels of collagen type 1, while severe cases have structural defects in collagen. Chondrodysplasias – Skeletal disorder believed to be caused by a mutation in type 2 collagen, further research is being conducted to confirm this. Ehlers–Danlos syndrome – Thirteen different types of this disorder, which lead to deformities in connective tissue, are known. Some of the rarer types can be lethal, leading to the rupture of arteries. Each syndrome is caused by a different mutation. For example, the vascular type (vEDS) of this disorder is caused by a mutation in collagen type 3. Alport syndrome – Can be passed on genetically, usually as X-linked dominant, but also as both an autosomal dominant and autosomal recessive disorder. Those with the condition have problems with their kidneys and eyes, and loss of hearing can also develop during childhood or adolescence. Knobloch syndrome – Caused by a mutation in the COL18A1 gene that codes for the production of collagen XVIII.
Sources: en.wikipedia.org
=== Composition === When dry, gelatin consists of 98–99% protein, but it is not a nutritionally complete protein since it is missing tryptophan and is deficient in isoleucine, threonine, and methionine. The amino acid content of hydrolyzed collagen is the same as collagen. Hydrolyzed collagen contains 19 amino acids, predominantly glycine (Gly) 26–34%, proline (Pro) 10–18%, and hydroxyproline (Hyp) 7–15%, which together represent around 50% of the total amino acid content. Glycine is responsible for close packing of the chains. Presence of proline restricts the conformation. This is important for gelation properties of gelatin. Other amino acids that contribute highly include: alanine (Ala) 8–11%; arginine (Arg) 8–9%; aspartic acid (Asp) 6–7%; and glutamic acid (Glu) 10–12%.
Conversely, in sports requiring athletes to excel in actions such as running or jumping, it is beneficial to have longer than average Achilles tendon and a shorter calf muscle. Tendon length is determined by genetic predisposition, and has not been shown to either increase or decrease in response to environment, unlike muscles, which can be shortened by trauma, use imbalances and a lack of recovery and stretching. In addition tendons allow muscles to be at an optimal distance from the site where they actively engage in movement, passing through regions where space is premium, like the carpal tunnel.
=== Arthrochalasia type Ehlers-Danlos syndrome === This type of Ehlers-Danlos is caused by the mutation of the COL1alpha1 and COL1alpha2 genes, which are responsible for encoding the proalpha1 and proalpha2 chains respectively.
Overview, University of Kansas Archived 26 December 2010 at the Wayback Machine Connective tissue atlas, University of Iowa Heritable disorders of connective tissue US National Institute of Arthritis and Musculoskeletal and Skin Diseases Connective tissue photomicrographs
=== Heritable connective tissue disorders === Hereditary connective tissue disorders are a diverse set of broad, single-gene disorders that impact one or more of the main components of connective tissues, such as ground substance (glycosaminoglycans), collagen, or elastin. Many result in anomalies of the skeleton and joints, which can substantially impair normal growth and development. In contrast to acquired connective tissue diseases, these conditions are uncommon.
Sources: en.wikipedia.org
No. Cardarine is GW501516, a PPARδ agonist, while SARMs act on androgen receptors. The two classes are often grouped in informal discussions despite different mechanisms.
No. It has no approved medical indication in any country. Regulatory agencies have not cleared it for treatment or prevention of any condition.
Early clinical work stopped after rodent carcinogenicity findings. Those animal results raised concerns about long-term human risk, although direct human evidence is lacking. The human relevance of the tumors remains an open scientific question.
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.