GW501516 comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Last reviewed on 2026-03-21. Where a claim depends on a specific study, the study is described rather than over-claimed.
Cardarine is a common name for GW501516, a synthetic compound studied for its effects on lipid and glucose metabolism. It functions as an agonist at peroxisome proliferator-activated receptor delta, or PPARδ, a nuclear receptor that influences gene expression. The molecule is not a steroid, nor is it a selective androgen receptor modulator. It is also known in research and sports literature as GW-501516 and endurobol. Early laboratory work examined its metabolic activity in cell cultures and animal models.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
The compound is typically described as a laboratory compound rather than a therapeutic product. Published reports have explored its role in lipid disorders, insulin sensitivity, and exercise metabolism, yet no major drug regulator has approved it for medical use. Commercial samples sold under the cardarine name may vary in purity and identity. Analytical confirmation is therefore necessary when the material is discussed in scientific or regulatory contexts. Its classification as a prohibited substance in sport further shapes how it is studied and reported.
GW501516 acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in transcription of genes related to lipid handling and energy use. Activation of PPARδ can shift skeletal muscle toward greater fatty acid oxidation in animal models, which is one reason it drew interest for metabolic disease and exercise research. The exact downstream effects depend on tissue, species, dose, and duration. Human data are sparse, so many proposed benefits remain hypotheses rather than established clinical outcomes.
Laboratory studies have examined GW501516 in cell cultures and rodents for conditions such as dyslipidemia, insulin resistance, and obesity. Some trials in humans were initiated, but development was discontinued after preclinical findings raised concerns about cancer in certain models. Those findings do not prove that the compound causes cancer in people, but they contributed to regulatory caution. Later reviews often describe the evidence as preliminary and insufficient for assessing long-term safety.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic PPARδ agonist | Not a steroid or a selective androgen receptor modulator. |
| Common synonyms | Cardarine, GW501516, GW-501516, endurobol | Names vary by supplier and literature source. |
| Appearance | White to off-white powder | Consistent with many small-molecule research chemicals. |
| Solubility | Low in water; soluble in DMSO and ethanol | Often prepared in organic solvent for laboratory work. |
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid and energy metabolism. |
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.
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.
A common misconception is that cardarine has been proven safe for human use. In reality, human clinical data are limited, and long-term animal studies have raised concerns about cancer. Another misconception is that it is a supplement or vitamin-like compound. It is a synthetic research chemical with no approved medical indication. Scientific discussion often focuses on its mechanism and detection rather than therapeutic use. Regulatory and anti-doping literature treats it primarily as a prohibited substance.
Cardarine is explicitly prohibited by the World Anti-Doping Agency under the class of PPARδ agonists. Its presence in urine or blood samples can be detected using mass spectrometry-based methods, often liquid chromatography-tandem mass spectrometry. Athletes who test positive may face sanctions, including bans from competition. The compound is also regulated as a prescription-only or unapproved drug in many countries. Enforcement varies by jurisdiction, and some regions treat it as a controlled substance. Online sales may occur despite these restrictions, creating quality and legal risks.
Laboratory detection of cardarine typically involves sample preparation followed by chromatographic separation and mass spectrometric identification. Urine is the most common matrix for anti-doping tests, though blood and hair have also been explored. Methods can target the parent compound or its metabolites, depending on the expected window of detection. Reference standards are required for accurate quantification. Matrix effects and dilution can influence results, so laboratories use internal standards and validation protocols. The exact detection window varies with dose, route, 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.
=== Pharmacodynamics === 4-Fluoroselegiline is a selective and irreversible inhibitor of monoamine oxidase B and monoaminergic activity enhancer. A radiolabelled derivative incorporating 18F is used to study MAO-B inhibition in both in vivo and in vitro experiments.
== Research and publications == Davies has authored numerous peer-reviewed articles on diabetes and related conditions. Her work has appeared in journals such as The Lancet, New England Journal of Medicine, and Diabetes Care.
==== Plants ==== The reduction of silver ions into silver nanoparticles has also been achieved using geranium leaves. It has been found that adding geranium leaf extract to silver nitrate solutions causes their silver ions to be quickly reduced and that the nanoparticles produced are particularly stable. The silver nanoparticles produced in solution had a size range between 16 and 40 nm. In another study different plant leaf extracts were used to reduce silver ions. It was found that out of Camellia sinensis (green tea), pine, persimmon, ginko, magnolia, and platanus that the magnolia leaf extract was the best at creating silver nanoparticles. This method created particles with a disperse size range of 15 to 500 nm, but it was also found that the particle size could be controlled by varying the reaction temperature. The speed at which the ions were reduced by the magnolia leaf extract was comparable to those of using chemicals to reduce. The use of plants, microbes, and fungi in the production of silver nanoparticles is leading the way to more environmentally sound production of silver nanoparticles. A green method is available for synthesizing silver nanoparticles using Amaranthus gangeticus Linn leaf extract.
Sources: en.wikipedia.org
The other measurement, based on the Brønsted–Lowry definition, is the acid dissociation constant (Ka), which measures the relative ability of a substance to act as an acid under the Brønsted–Lowry definition of an acid. That is, substances with a higher Ka are more likely to donate hydrogen ions in chemical reactions than those with lower Ka values.
Xi's position as the apparent successor to become the paramount leader was threatened with the rapid rise of Bo Xilai, the party secretary of Chongqing at the time. Bo was expected to join the PSC after the 18th Party Congress, with most expecting that he would try to eventually maneuver himself into replacing Xi. Bo's policies in Chongqing inspired imitations throughout China and received praise from Xi himself during Xi's visit to Chongqing in 2010. Records of praises from Xi were later erased after he became paramount leader. Bo's downfall would come with the Wang Lijun incident, which opened the door for Xi to come to power without challengers. On 18 October 2010, at the fifth plenary session of the 17th Central Committee, Xi was elected to be a vice chairman of the CCP Central Military Commission, followed by his appointment as vice chairman of the state CMC on 28 October by the Standing Committee of the National People's Congress. A few months before his ascendancy to the party leadership, Xi disappeared from official media coverage and cancelled meetings with foreign officials for several weeks beginning on 1 September 2012, causing rumors. He then reappeared on 15 September. On 15 November 2012, immediately after the 18th Party National Congress, Xi was elected by the first plenary session the 18th Central Committee to the posts of Party general secretary and chairman of the Party CMC. This made him both the CCP leader and, informally, China's paramount leader. The following day Xi led the new line-up of the PSC onto the stage in their first public appearance.
On 20 August 2020, Russian opposition leader Alexei Navalny fell ill during a flight from Tomsk to Moscow. The plane made an emergency landing in Omsk, where Navalny was hospitalized and put in a medically induced coma. His family suspected his illness was caused by a poison put into a cup of tea he drank before the flight. He was evacuated to the Charité hospital in Berlin, Germany, the following day. On 2 September, the German government said that it had "unequivocal evidence" that Navalny was poisoned by a Novichok agent after tests at a German military lab and had called on the Russian government for an explanation, with labs in France and Sweden corroborating the findings. On 4 September, the North Atlantic Council was briefed by the German representative on the "appalling assassination attempt on" Navalny. In a post-meeting press conference, Secretary-General Jens Stoltenberg said that NATO allies "agree that Russia has serious questions it must answer", that the OPCW needed to conduct an impartial investigation, that "those responsible for this attack must be brought to justice" and called on Russia to "provide complete disclosure of the Novichok programme to the OPCW." Navalny had been out of his coma since 7 September. On 6 October, the OPCW confirmed the presence of a cholinesterase inhibitor from the Novichok group in Navalny's blood and urine samples. At the same time, the OPCW report clarified that Navalny was poisoned with a new type of Novichok, which was not included in the list of controlled chemicals of the Chemical Weapons Convention.
=== Independent investigations === In June 2021, the NIH announced that a set of sequence data had been removed from the Sequence Read Archive (SRA) in June 2020. The removal was performed according to standard practice at the request of the investigators who owned the rights to the sequences, with the investigators' rationale that the sequences would be submitted to another database. The investigators subsequently published a paper in an academic journal the same month they were removed from the NIH database which described the sequences in detail and discussed their evolutionary relationship to other sequences, but did not include the raw data. Virologist David Robertson said that it was difficult to conclude it was a cover-up rather than the more likely explanation: a mundane deletion of data without malfeasance. The missing genetic sequence data was restored in a correction published 29 July 2021 after it was stated to be a copy-edit error. In September 2024, a study published in Cell found genetic evidence that COVID-19 may have originated from the illegal trade of infected raccoon dogs in Wuhan, China, supporting the zoonotic transmission scenario. Swabs taken from the Huanan Seafood Wholesale Market in January 2020, which tested positive for coronavirus, contained large amounts of genetic material from raccoon dogs.
Sources: en.wikipedia.org
=== House of Representatives === In 1968, Mizell was elected to represent the 5th District in the 91st United States Congress. He defeated Democratic nominee Smith Bagley, an R.J. Reynolds Tobacco Company official, 84,905 (52.4 percent) to 77,112 (47.6 percent). The previous 5th District representative, Democrat Nick Galifianakis, was moved to the 4th District for the 1968 elections. A supporter of Richard Nixon, Mizell ran on a platform vehemently opposed to federal spending and Communism. In his first term, he spoke in favor of trade legislation. "I believe no nation in the world need fear the Trade Bill of 1970," he said, praising it for its benefits to foreign nations and American workers alike.
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Café de olla (lit. 'pot coffee') is a traditional Mexican coffee beverage. To prepare café de olla, it is essential to use a traditional earthen clay pot, as this gives a special flavor to the coffee. This type of coffee is principally consumed in cold climates and in rural areas. In Mexico, a basic café de olla is made with ground coffee, cinnamon and piloncillo. Optional ingredients include orange peel, anise and cloves.
An immigration judge rules that Trump can deport the Palestinian-born leader of Wisconsin's largest mosque—an outspoken advocate of Palestinian rights—who does not have a criminal record in the US, where he has lived since 1993 on national security grounds, citing his imprisonment in Israel in 1988 after being convicted of throwing stones at Israeli military personnel in the West Bank.
Transuranic waste (TRUW) as defined by U.S. regulations is, without regard to form or origin, waste that is contaminated with alpha-emitting transuranic radionuclides with half-lives greater than 20 years and concentrations greater than 100 nCi/g (3.7 MBq/kg), excluding high-level waste. Elements that have an atomic number greater than uranium are called transuranic ("beyond uranium"). Because of their long half-lives, TRUW is disposed of more cautiously than either low- or intermediate-level waste. In the United States, it arises mainly from nuclear weapons production, and consists of clothing, tools, rags, residues, debris, and other items contaminated with small amounts of radioactive elements (mainly plutonium). Under U.S. law, transuranic waste is further categorized into "contact-handled" (CH) and "remote-handled" (RH) on the basis of the radiation dose rate measured at the surface of the waste container. CH TRUW has a surface dose rate not greater than 200 mrem per hour (2 mSv/h), whereas RH TRUW has a surface dose rate of 200 mrem/h (2 mSv/h) or greater. CH TRUW does not have the very high radioactivity of high-level waste, nor its high heat generation, but RH TRUW can be highly radioactive, with surface dose rates up to 1,000,000 mrem/h (10,000 mSv/h). The United States currently disposes of TRUW generated from military facilities at the Waste Isolation Pilot Plant (WIPP) in a deep salt formation in New Mexico.
Sources: en.wikipedia.org
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.
It binds to and activates PPARδ, a nuclear receptor that regulates genes related to fatty acid oxidation and energy use. This activation alters transcription in tissues such as skeletal muscle and liver. The full range of downstream effects in humans is not fully established.
No, cardarine is not known to occur naturally in plants, animals, or humans. It is a synthetic molecule produced for laboratory research. Products labeled as cardarine should therefore be treated as manufactured chemicals with variable purity.
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.