metabolite raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2026-08-01 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.
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.
| 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. |
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.
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.
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.
The Panzergrenadier Division "Großdeutschland", also commonly referred to simply as Großdeutschland or Großdeutschland Division, was an elite combat unit of the German Army (Heer) that fought on the Eastern Front in World War II. Formed in 1921, it was known as the Wachregiment Berlin and served as a ceremonial guard unit until it was in mid-1939 re-equipped for combat, becoming a regiment of the combined Wehrmacht German armed forces. The regiment would later be expanded and renamed Infanterie-Division Großdeutschland in 1942, and after significant reorganization was renamed Panzergrenadier-Division Großdeutschland in May 1943. In November 1944, while the division retained its status as a Panzergrenadier division, some of its subordinate units were expanded to divisional status, and the whole group of divisions were reorganized as Panzerkorps Großdeutschland.
=== Role of metabolism in cancer === The role of PI-3-kinase in anabolic signaling by insulin, IGF-1, and other growth factors makes a straightforward link between metabolism and cancer, especially in light of the discovery that the PIK3CA gene encoding PI-3-kinase is an oncogene. In recent years Cantley and colleagues have made additional links between metabolic regulation and oncogenic transformation with their discovery that the M2 isoform of pyruvate kinase is associated with cancer. This discovery provides a molecular basis for understanding the Warburg effect. Cantley is now a major player in the resurgence of the importance of the Warburg effect in the process of oncogenesis.
== Reaction from sports organizations == Many sports organizations have banned the use of performance-enhancing drugs and have very strict rules and penalties for people who are caught using them. The International Amateur Athletic Federation, now World Athletics, was the first international governing body of sport to take the situation seriously. In 1928 they banned participants from doping, but with little in the way of testing available they had to rely on the word of the athlete that they were clean. It was not until 1966 that FIFA and Union Cycliste Internationale (cycling) joined the IAAF in the fight against drugs, followed by the International Olympic Committee the following year. Progression in pharmacology has always outstripped the ability of sports federations to implement rigorous testing procedures but since the creation of the World Anti-Doping Agency in 1999, it has become more effective to catch athletes who use drugs. The first tests for athletes were at the 1966 European Championships and two years later the IOC implemented their first drug tests at both the Summer and Winter Olympics. Anabolic steroids became prevalent during the 1970s and after a method of detection was found they were added to the IOC's prohibited substances list in 1975, after which the 1976 Summer Olympics in Montreal were the first Olympic Games which tested for them. Over the years, different sporting bodies have evolved differently in the struggle against doping. Some, such as athletics and cycling, are becoming increasingly vigilant against doping.
In November 2020, "AJISWEET RA", produced in Japan cooperating with Morita Kagaku Kogyo Co., Ltd., was newly launched to the US as stevia sweetener reducing bitterness and off-flavors. In December, Ajinomoto Group made a wholly owned supplement company in Ireland by a share purchase agreement with Nualtra Limited in order to enter Europe's oral nutritional supplements market. In December 2020, Ajinomoto was included by CDP in its "Climate Change A List for 2020" for the first time, as one of the most outstanding companies in terms of climate change-related initiatives and information disclosure for its climate impact. in 2021, Ajinomoto joined WIPO GREEN as an official partner in an effort to address climate change. In February 2021, Ajinomoto Animal Nutrition Group Inc. transferred all of its 100% equity stake in Ajinomoto Animal Nutrition Europe S.A., a European feed-use amino acid company, to METabolic EXplorer, a French operating company with strengths in R&D of fermentation technologies. On the Tokyo Nutrition Summit 2021, held on December 7–8, 2021, Ajinomoto announced its Nutrition Commitment, a specific goal for improving nutrition, and registered it on the commitment registration website (Global Nutrition Report) on October 26. Ajinomoto Co., Inc. has planned and resolved the MediumTerm ASV Management 2030 Roadmap at its Board of Directors Meeting of February 28, 2023.
== Safety == As an oxidant, silver nitrate should be properly stored away from organic compounds. It reacts explosively with ethanol. Despite its common usage in extremely low concentrations to prevent gonorrhea and control nosebleeds, silver nitrate is still very toxic and corrosive. Brief exposure will not produce any immediate side effects other than the purple, brown or black stains on the skin, but upon constant exposure to high concentrations, side effects will be noticeable, which include burns. Long-term exposure may cause eye damage. Silver nitrate is known to be a skin and eye irritant. Silver nitrate has not been thoroughly investigated for potential carcinogenic effect.
Sources: en.wikipedia.org
== Nutrition == NATO bases the nutritional content requirement on a reference soldier weighing 79 kg (174 lb), who on normal operations would have an energy expenditure of approximately 3,600 kcal per day. For combat operations, energy expenditure is estimated to be 4,900 kcal per day; however, this is seen to be a worst-case scenario.
The Dexcom receiver is a compatible display device used to view automatic glucose readings from Dexcom continuous glucose monitoring systems. It may be used as an alternative to, or in conjunction with, a compatible smartphone. Over the years, multiple versions of Dexcom receivers have been released, varying in design and functionality. Earlier models were powered by replaceable batteries, while more recent versions, including the Dexcom G7 receiver, feature rechargeable batteries.
Pre-synthesized polymers, like the PDMEAMA/PTMSPMA block copolymer, can be immobilized on a surface (i.e. glass) by simply immersing the surface in an aqueous solution containing the polymer. For a process like this, grafting density depends on the concentration and molecular weight of the polymer as well as the amount time the surface was immersed in solution. As expected, an inverse relationship exists between grafting density and molecular weight. As the antimicrobial activity depends on the concentration of quaternary ammonium tethered to the surface, grafting density and molecular weight represent opposing factors that can be manipulated to achieve high efficacy.
== Road closure == An ice road will typically be closed as a result of deterioration of the running or operating surface, before there is any risk of ice cover failure. Surface deterioration can happen when the ice surface becomes too soft, or because of an excessive amount of meltwater on its surface. Mid-season road closures can also happen for similar reasons, and also because of inclement weather, such as a blizzard. If the ice road is part of a winter road, then closure can also be due to an over-land segment that has become unserviceable.
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.
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.