GW501516 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.
Last reviewed on 2025-11-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular target | PPAR delta (NR1C2) | Ligand-activated nuclear receptor. |
| Primary tissues studied | Skeletal muscle, liver, adipose | Effects on fatty acid oxidation and energy use. |
| Typical detection matrix | Urine | Used in anti-doping analysis. |
| Common analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Sport regulatory class | Prohibited at all times | Listed as a metabolic modulator by WADA. |
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.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
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.
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.
=== Extraction === Oil extraction is simply the removal of oil from the reservoir (oil pool). There are many methods of extracting the oil from the reservoirs for example; mechanical shaking, water-in-oil emulsion, and specialty chemicals called demulsifiers that separate the oil from water. Oil extraction is costly and often environmentally damaging. Offshore exploration and extraction of oil disturb the surrounding marine environment.
== Medical uses == Dezocine is generally administered intravenously (as Dalgan) to relieve post-operative pain in patients. It can also be administered in intramuscular doses, and is given once rather than continuously. It is often administered in post-operative laparoscopy patients as an alternative to fentanyl. Dezocine has potent analgesic effects, and comparable or greater pain-relieving ability than morphine, codeine, and pethidine (meperidine). It is a more effective analgesic than pentazocine, but causes relatively more respiratory depression. Dezocine is a useful drug for the treatment of pain, but side effects such as dizziness limit its clinical application, and it can produce opioid withdrawal syndrome in patients already dependent on other opioids. Because of its high efficacy, dezocine is often administered at a base dose of 0.1 mg/kg. Respiratory depression, a side effect of dezocine, reaches a ceiling at 0.3 to 0.4 mg/kg.
AlphaFold's predicted structures are widely used in biological research, though the precise scale of that use is difficult to measure. More than 40% of protein-structure papers published in 2023 in Cell, Nature, and Science cited AlphaFold 2. A 2024 bibliometric analysis of the Web of Science database identified 1,680 peer-reviewed papers referencing AlphaFold published between January 2019 and May 2024. Measures of this kind rely on authors citing the AlphaFold papers when they use the tool, a convention encouraged but not enforced by the maintainers of the AlphaFold Protein Structure Database. Attempts to validate these counts against the full text of papers suggest that citations to foundational AlphaFold papers can both overstate and understate how widely the tool is used. In an analysis of about 8,900 papers in the PubMed Central Open Access corpus that mentioned AlphaFold, roughly 30% cited none of three foundational AlphaFold papers, while only about half of the papers citing at least one of those three mentioned AlphaFold anywhere in their text. A smaller manual check of 100 papers from a curated protein-literature database found a similar shortfall, with fewer than half of those mentioning AlphaFold including a formal citation.
The SNX8 is a sorting nexin protein involved in intracellular molecular traffic from the early endosomes to the trans-golgi network. It is suggested that it acts as an adaptor protein in events related to immune response and cholesterol regulation, for example. As a protein of the SNXs family, the SNX8 is formed of 465 aminoacids and presents a BAR domain and a PX domain which are very relevant in relation to its functions. Furthermore, SNX8 study is motivated by its medical significance in relation to diseases such as Alzheimer's Disease, cancer, neurodevelopmental malformations and to its role in fighting against viral infections.
== Bibliography == Hluchan, Stephen E.; Pomerantz, Kenneth (2005). "Calcium and Calcium Alloys". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a04_515.pub2. ISBN 978-3-527-30673-2.
Sources: en.wikipedia.org
Genetic factors may be the most significant cause of autism. Early studies of twins had estimated heritability to be over 90%, meaning that genetics explains over 90% of whether a child will develop autism. This may be an overestimation, as later twin studies estimate the heritability at between 60 and 90%. Evidence so far still suggests a strong genetic component, with one of the largest and most recent studies estimating the heritability at 83%. Many of the non-autistic co-twins had learning or social disabilities. For adult siblings, the probability of having one or more features constitutive of the broader autism phenotype may be as high as 30%. In spite of the strong heritability, most cases of autism occur sporadically with no recent evidence of family history. It has been hypothesized that spontaneous de novo mutations in the sperm or egg contribute to the likelihood of developing autism. Additionally, mutations of the Fragile X Messenger Ribonucleoprotein 1 (FMR1) which cause fragile X syndrome, one of the most common causes of intellectual disability and autism, have been linked to the early cessation of reproductive functions of female carriers in the gene. This substantiates the notion that those with autism are more likely to be infertile, weakening the heritability of the disorder. Also, the likelihood of having a child develop autism generally increases with advancing parental age, and mutations in sperm gradually accumulate throughout a man's life.
=== Balkans and Greece === After the Battle of Leros, New Zealand withdrew its squadron from the Long Range Desert Group, compelling the LRDG to reorganise itself into two squadrons of eight patrols each. A Squadron was composed of Rhodesians and B Squadron comprised British troops and a squadron of signallers; around 80 of the officers and men were from Southern Rhodesia. The group was reassigned from the Middle East Command to the Central Mediterranean Force in early 1944, and deployed to the Gargano peninsula in south-eastern Italy, where a new LRDG headquarters was set up near the seaside town of Rodi. Britain hoped to compel the Germans to commit as many divisions as possible to south-eastern Europe so they could not be used on the more important fronts closer to Germany. In June 1944 the LRDG was assigned to operate on the coast of Yugoslavia, with orders to set up observation posts, report the movements of German ships and undertake minor raids.
=== Uniforms === Battledress - Used until the 1960s Boots, General Service Khaki drill Denison smock - Used in airborne units until the 1970s 1950 Pattern Jungle Green Dress Boots, Tropical Jungle 1960 Pattern Combat Dress - Produced in olive green and then in Disruptive Pattern Material. Boots, Directly Moulded Sole 1968 Pattern No. 8 Combat Dress - Produced in Disruptive Pattern Material. Smock Parachutist DPM Lightweight Trousers - Produced in olive green No. 9 Tropical Dress 1984 Pattern Combat Dress Boots, Combat, High
Major (Gurkha Commissioned Officer) Lilbahadur Gurung (513800), Queen's Gurkha Signals. Major Lester Andrew Holley (505640), The Royal Gurkha Rifles. Major Anthony Lovell Jackson (509141), Royal Regiment of Artillery. Acting Major John Frederick Kemp (486467), Kent Army Cadet Force, Territorial Army. 24011748 Warrant Officer Class 2 Christopher Keogh, Royal Regiment of Artillery. 24256499 Corporal of Horse Ian Kirkpatrick, The Life Guards. Major Robert Scott Lawther (520854), The Royal Irish Regiment. Major Philip John Leighton (509537), The Green Howards. Major Allan Charles LeQuelenec (520025), Royal Army Medical Corps. Major Richard Allen Licence (530853), Royal Corps of Signals. Major Simon Jonathan Alun Lloyd (499742), Royal Regiment of Artillery. 24435856 Warrant Officer Class 2 John MacKinnon, Corps of Royal Engineers. Lieutenant Colonel Donald Anderson MacLean (Retired). Acting Lieutenant Colonel Peter David Marsden (473626), Monkton Combe School Combined Cadet Force, Territorial Army. 24335098 Warrant Officer Class 1 Terence George Morrissey, Adjutant General's Corps (SPS). Lieutenant Stuart Joseph Nye (546430), The Princess of Wales's Royal Regiment. 24853206 Lance Corporal (Acting Corporal) Derrick Anthony O'Connor, Corps of Royal Engineers. 24413672 Colour Sergeant Stuart Owen Oliver, The Royal Regiment of Fusiliers. Lieutenant (Acting Captain) Nigel Derek Partington (546198), Royal Army Medical Corps. Captain (Acting Major) Brian William Pitchforth (537833), The Parachute Regiment. 24256052 Warrant Officer Class 1 Joseph Thomas Preece, The Light Dragoons.
Sources: en.wikipedia.org
ATP is stable in aqueous solutions between pH 6.8 and 7.4 (in the absence of catalysts). At more extreme pH levels, it rapidly hydrolyses to ADP and phosphate. Living cells maintain the ratio of ATP to ADP at a point ten orders of magnitude from equilibrium, with ATP concentrations fivefold higher than the concentration of ADP. In the context of biochemical reactions, the P-O-P bonds are frequently referred to as high-energy bonds.
US-market models had round sealed-beam headlamps mounted in pill-shaped bezels fitting the original openings. The 1971 version was the first piston-powered Familia sold in the United States and arrived in two- and four-door forms alongside its rotary Mazda R100 coupé counterpart. It was replaced by the somewhat larger 808 (Grand Familia) the next year. The 1200 model returned for 1973 as the base-model economy Mazda. The company then focused on performance for the next two years, dropping the economy car. After the gas crisis they returned to the economy sector with the Mizer in 1976, a rebadged 808/818. Engine (US):
=== Appellate reversal === On October 24, 2011, the United States Court of Appeals for the Second Circuit ruled in favor of Banki and reversed the sanctions charges against him. Judge Keenan's court-ordered Banki's release 10 days later on November 2, 2011. The appellate court ruled that Judge John F. Keenan had erred at trial; in denying Banki's defense request to instruct the jury on the law that specifically exempts family money as an exception to the sanctions law, permitting such transfers without the need for a license. The final appellate court brief stated: "Banki's conviction [on the sanctions charges] cannot stand". Prosecutors reopened the case to pursue a retrial in February 2012. However, after a few months of delay and the assignment of a new judge, the case was closed criminally with no option for future civil or criminal prosecution. Rather than pay for the high cost of a second criminal defense trial, Banki agreed to relinquish $710k of his assets. In exchange, prosecutors agreed that Banki was not guilty of the sanctions charges without going through a second trial and that they would end pursuing the case further in criminal or civil courts. The case was permanently closed on July 24, 2012. In the final court hearing, Banki's prison record was cleared. During the hearing, Banki said he had lived through "the darkest hours" of his life while in prison. "I watched my life pass me by. Those days will never be replaced". Judge Engelmayer in clearing Banki's prison record called him a "talented man, even brilliant". The judge also stated: ". . .
== Overview of AIDA physiological model == AIDA has been described in detail in the medical / scientific / computing / diabetes literature. It incorporates a compartmental model that describes glucose-insulin interaction in people completely lacking endogenous insulin secretion — i.e. insulin-dependent patients with type 1 diabetes mellitus. The AIDA model contains a single extra-cellular glucose compartment into which glucose enters via both absorption from the intestine and glucose production from the liver. The model also contains separate compartments for plasma and 'active' insulin, the latter being responsible for glycemic control while insulin is removed from the former by liver degradation. Full details of the AIDA model are accessible from within the AIDA software package, and can be viewed and printed separately via the AIDA website.
=== Genocide and Don Cossacks === Kiev pogroms of 1919 "Carried by Don Cossacks". Decossackization Ethnic Cleansing of Circassians Genocides in history Human rights in the Soviet Union Population transfer in the Soviet Union
Sources: en.wikipedia.org
It binds to and activates PPAR delta, a nuclear receptor that controls expression of genes related to fatty acid oxidation. This mechanism can alter energy metabolism in animal models. It is not a direct stimulant or fat-burning enzyme.
Early-stage trials examined lipid and glucose markers, but the development program was discontinued. Published human results are limited and do not support approved use for any indication. Claims of performance or health benefits remain unproven.
Yes. Laboratories use LC-MS/MS to detect GW501516 and its metabolites in urine. Detection depends on timing and sensitivity, but the substance is banned at all times.
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.