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.
Updated 2026-03-29. Numbers and descriptions here follow the published literature rather than marketing material.
Published literature on cardarine includes in vitro assays, rodent experiments, and a small number of human studies. Reports describe effects on exercise capacity and lipid metabolism in animals, while human evidence is sparse. Many online descriptions present the compound as a proven endurance aid, a claim not supported by regulatory approval or large clinical trials. Analytical studies focus on identifying the parent compound and its metabolites in biological samples. Important uncertainties include species differences, dose-response relationships, and the relevance of rodent tumor findings to humans.
Cardarine is the common name for GW501516, a synthetic compound studied as a peroxisome proliferator-activated receptor delta agonist. Researchers developed it to explore treatments for lipid disorders and metabolic conditions. It is not an approved medicine in any country. Early clinical work examined changes in HDL cholesterol and triglycerides, but development was discontinued after animal studies raised concerns about cancer. The compound remains available as a research chemical and appears in discussions of performance enhancement.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Also called GW501516 and endurobol. |
| Chemical formula | C21H18F3NO3S2 | Molecular weight about 453.5 g/mol. |
| Appearance | White to off-white solid | Form depends on synthesis and purity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, protected from light | Common for research chemicals. |
Cardarine is a common name for GW501516, an investigational compound developed in the 1990s for metabolic conditions. It acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in lipid and energy metabolism. The compound is frequently mislabeled as a selective androgen receptor modulator, or SARM, but its molecular target is different. GW501516 reached early clinical testing before development was discontinued. It has no approved therapeutic use in any country. The name cardarine is not a formal international nonproprietary name.
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.
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.
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.
Biden entered office nine months into a recovery from the COVID-19 recession and his first year in office was characterized by robust growth in real GDP, employment, wages, and stock market returns, amid significantly elevated inflation. Real GDP grew 5.9%, the fastest rate in 37 years. Amid record job creation, the unemployment rate fell at the fastest pace on record. By the end of 2021, inflation rates measured by the consumer price index (CPI) reached a nearly 40-year high of 7.1%, which was partially offset by the highest nominal wage and salary growth in at least 20 years. The inflation rate peaked at 9% in June 2022. The inflation rate reached 2.9% and core inflation rate reached 3.2% on an annual basis in December 2024, the last full month of Biden's term. Between December 2020 and December 2024, CPI rose 21.3% overall, with an annualized inflation rate of 5.3% throughout Biden's term in office. The inflation rate remained above the Federal Reserve's 2% target every month since March 2021, resulting in elevated interest rates to combat inflation. Average wages increased 19% throughout Biden's presidency, falling behind inflation. The unemployment rate declined by over 2% and real GDP grew 11% during Biden's term. Total household net worth increased by 28%, largely driven by stocks and real estate. The national debt grew to $36.2 trillion, with a debt to GDP ratio of 123% and a deficit to GDP ratio of 6% in FY 2024. In February 2023, the unemployment rate fell to 3.4%, a 53-year low.
The significant leaks of testimonies in the case are raising legal concerns for the Belgian authorities as they continue their investigation. Kaili's actions had already attracted suspicion among the members of her S&D party before her arrest. Dutch lawmaker Lara Wolters, who served in the European Parliament with the same political group as Kaili, described Kaili's modus operandi in an interview with the EU Scream podcast. According to Wolters, Kaili tried to prevent her from expressing views critical of Qatar during discussions in the European Parliament. Kaili's last known action in favour of Qatar before her arrest was casting a vote in the Civil Liberties Committee (of which she was not a member) in support of a report advocating for visa-free travel to the EU for Qatari citizens. While this vote was allowed under the European Parliament' rules, Kaili should have notified members and parliament staff of her intention to vote in advance, which she failed to do. German member Gabriele Bischoff said that Kaili's vote violated "internal rules".
=== Disease === The normal bone marrow architecture can be damaged or displaced by aplastic anemia, malignancies such as multiple myeloma, or infections such as tuberculosis, leading to a decrease in the production of blood cells and blood platelets. The bone marrow can also be affected by various forms of leukemia, which attacks its hematologic progenitor cells. Furthermore, exposure to radiation or chemotherapy will kill many of the rapidly dividing cells of the bone marrow, and will therefore result in a depressed immune system. Many of the symptoms of radiation poisoning are due to damage sustained by the bone marrow cells. To diagnose diseases involving the bone marrow, a bone marrow aspiration is sometimes performed. This typically involves using a hollow needle to acquire a sample of red bone marrow from the crest of the ilium under general or local anesthesia.
Cycloprop-2-ene carboxylic acid is a mycotoxin found in some mushrooms such as Russula subnigricans. When ingested, the molecule is known to cause dose-dependent rhabdomyolysis. In mice, the oral LD50 of this molecule is 2.5 mg/kg and poisoning is indicated by an increase in blood creatine phosphokinase levels. Polymerization via the ene reaction abolishes toxicity. 3-(Cycloprop-2-en-1-oyl)oxazolidinones are a class of ‘unusually stable’ derivatives of the mycotoxin that have been synthesized by Fox et al. As mentioned by Fox et al, this class of ‘unusually stable’ derivatives are dienophiles when involved in a Diels-Alder reaction. The pure substance is a hydroscopic white solid that is able to decarboxylate exothermically.
Sources: en.wikipedia.org
Expressing concern that ammonia should be mentioned on the labels of packaged ground beef to which the treated trimmings are added, Zirnstein stated "I do not consider the stuff to be ground beef, and I consider allowing it in ground beef to be a form of fraudulent labeling". He later stated that his main concern was that connective tissue is not "meat", and that ground beef to which the product had been added should not be called ground beef, since it is not nutritionally equivalent to regular ground beef. In 2007, the USDA determined the disinfection process was so effective that it would be exempt from "routine testing of meat used in hamburger sold to the general public". In December 2009, an investigative piece published by The New York Times questioned the safety of the meat treated by this process, pointing to occasions in which process adjustments were not effective. This article included the first public use of the term "pink slime" as a pejorative. In January 2010, The New York Times published an editorial reiterating the concerns posed in the news article while noting that no meat produced by BPI had been linked to any illnesses or outbreaks. An episode of Jamie Oliver's Food Revolution aired on April 12, 2011, depicted Jamie Oliver decrying the use of "pink slime" in the food supply and in school lunches. In the episode, Oliver douses beef trimmings in liquid ammonia while explaining what the product is and why he is disgusted with it.
=== Military use === As of 2012, the United States Air Force used zolpidem as one of the hypnotics approved as a "no-go pill" with a six-hour restriction on subsequent flight operation to help aviators and special duty personnel sleep in support of mission readiness. (The other hypnotics used are temazepam and zaleplon.) "Ground tests" are required before an authorization is issued to use the medication in an operational situation.
10 October On the advice of Kissinger, Nixon issued secret orders to the Joint Chiefs of Staff to commence Operation Giant Lance, the sending of bombers armed with nuclear weapons toward Moscow in an effort to convince the Soviet leaders that he was not reluctant to launch a nuclear war in an effort to end the ongoing war. A squadron of 18 B-52 bombers, each carrying nuclear bombs, would be sent out on 27 October.
Sources: en.wikipedia.org
Cardarine is a common name for the investigational compound GW501516. It acts as a PPARδ agonist and is not approved for human use. It is prohibited in sport.
It activates PPARδ, a nuclear receptor that influences gene expression related to lipid and energy metabolism. Animal studies show changes in endurance and lipid levels. Human effects and risks are not well established.
No, cardarine is not a steroid. It belongs to a different chemical class, the PPARδ agonists. It is also not a selective androgen receptor modulator.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.