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Background And Research Context — Complete Guide

By Editorial Desk · published 2026-03-25 · last reviewed 2026-04-30 · Blog

The short version of GW501516 fits in a sentence. The long version — which is the one that helps — is below.

Reviewed 2026-04-30. Anything still debated is marked as such rather than presented as settled.

Background and Research Context

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 Identity and Mechanism

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.

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 at a glance

PropertyValueNotes
CAS Registry Number317318-70-0Unique identifier for the compound.
Chemical classPPARδ agonistSynthetic ligand for peroxisome proliferator-activated receptor delta.
AppearanceWhite to off-white solidTypical form of research-grade material.
SolubilitySoluble in DMSO and ethanolPoorly soluble in water.
Typical storage-20°CRecommended for long-term storage of stock solutions.

Identity and Pharmacological Classification

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.

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Identity and Regulatory Status

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.

Reference notes

=== Chemical reactions === Changing the conditions of the reaction solvent can allow separation of phases for product removal, or single phase for reaction. Rapid diffusion accelerates diffusion controlled reactions. Temperature and pressure can tune the reaction down preferred pathways, e.g., to improve yield of a particular chiral isomer. There are also significant environmental benefits over conventional organic solvents. Industrial syntheses that are performed at supercritical conditions include those of polyethylene from supercritical ethene, isopropyl alcohol from supercritical propene, 2-butanol from supercritical butene, and ammonia from a supercritical mix of nitrogen and hydrogen. Other reactions were, in the past, performed industrially in supercritical conditions, including the synthesis of methanol and thermal (non-catalytic) oil cracking. Because of the development of effective catalysts, the required temperatures of those two processes have been reduced and are no longer supercritical.

Kidney dialysis is the process of removing excess water, solutes, and toxins from the blood in people whose kidneys can no longer perform these functions naturally. Along with kidney transplantation, it is a type of renal replacement therapy. Dialysis may need to be initiated when there is a sudden rapid loss of kidney function, known as acute kidney injury (previously called acute renal failure), or when a gradual decline in kidney function, chronic kidney failure, reaches stage 5. Stage 5 chronic renal failure is reached when the glomerular filtration rate is less than 15% of the normal, creatinine clearance is less than 10 mL per minute, and uremia is present. Dialysis is used as a temporary measure in cases of acute kidney injury or for those awaiting kidney transplant and as a permanent measure in those for whom a transplant is not indicated or not possible. In West European countries, Australia, Canada, the United Kingdom, and the United States, dialysis is paid for by the government for those who are eligible. The first successful dialysis was performed in 1943.

In a meeting of the Quadrilateral Security Dialogue on the implications of the 2022 Russian invasion of Ukraine for the region, President Biden noted India's abstention, saying that most global allies were united against Russia. Speaking to the US Senate Foreign Relations Committee, US diplomat Donald Lu said the Biden administration was still considering sanctions against India over its S-400 deal with Russia, and its abstention at the UN. However, the Biden administration has ruled out secondary sanctions against India for its considerable oil imports or defence engagement from Russia.

Sources: en.wikipedia.org

Notes from published material

=== Writing === Shonda Rhimes said in an interview that the fifth season will begin only a few days after the events in the fourth-season finale. She stated that the fifth season will see Olivia and Fitz the only people standing in a single piece, as she said "The world had been fairly blown apart for everybody except Olivia and Fitz. Everybody else was in a fairly blown apart place ... We pick up right there in that environment and we see what happens next." Rhimes continued talking about Cyrus and Mellie and their situation of not being in the White House anymore. Rhimes also confirmed that "the reconstitution" of Team OPA would happen in the fifth season, as Rhimes revealed in an interview with TVLine, as she explained that the Gladiator conceit was sidelined a bit in the fourth season to instead "healing" Olivia. She noted that "a lot of times it was just Huck and Quinn gladiating by themselves. And that wasn’t the same dynamic."

The Telecom Regulatory Authority of India (TRAI) regulates all major aspects pertaining to media and telecommunications in Jammu and Kashmir. In addition, the Jammu and Kashmir administration released their media policy in 2020 which enabled government officers to sanction journalists and media organisations for disseminating "fake news", and is valid for the next five years. The policy attracted criticism for allegedly reducing people to "passive recipients of the information the government intends to disseminate." The Press Council of India (PCI) expressed concern over the provisions of fake news in the policy, as it "interferes with the free functioning of the press." Major periodicals in Jammu and Kashmir include Greater Kashmir, Rising Kashmir, Kashmir Times, Daily Excelsior, Elite Kashmir and Kashmir Monitor. DD Kashir is the state-owned television broadcaster. Popular private television channels are ETV Urdu and Gulistan News. In association with All India Radio, DD Kashir has established high power transmitters along the India–Pakistan border. Radio Sharda, a worldwide community radio service for Kashmiri Pandits, was started by Ramesh Hangloo. FM Tadka 95.0, BIG FM 92.7, Radio Mirchi and Red FM 93.5 are private FM radio stations. Internet shutdowns are frequent in Jammu and Kashmir. As of February 2021, the region had 300 internet shutdowns since 2012. In 2020 alone, this number was 115, the highest of any year.

== Uses == Industrially, anthranilic acid is an intermediate in the production of azo dyes (c.f. methyl red) and saccharin. It and its esters are used in preparing perfumes to mimic jasmine and orange, pharmaceuticals (loop diuretics, such as furosemide) and UV-absorber as well as corrosion inhibitors for metals and mold inhibitors in soy sauce. Anthranilate-based insect repellents have been proposed as replacements for DEET. Fenamic acid is a derivative of anthranilic acid, which in turn is a nitrogen isostere of salicylic acid, which is the active metabolite of aspirin. Several non-steroidal anti-inflammatory drugs, including mefenamic acid, tolfenamic acid, flufenamic acid, and meclofenamic acid are derived from fenamic acid or anthranilic acid and are called "anthranilic acid derivatives" or "fenamates". Anthranilic acid [118-92-3] was demonstrated to have utility in the synthesis of the following list of substances: clozapine, quetiapine, thiosalicylic acid, ofornine, strinoline, ciliobrevin A, bentazon, quinezamide, nifurquinazol, nitromethaqualone, & YT-1 (1-azaflavone) [14802-18-7], atolide (actually isatoic anhydride), melicopicine. & tranilast. U-17660 [13450-72-1] & THA-Q [4425-23-4].

Sources: en.wikipedia.org

Frequently asked questions

What is cardarine?

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.

Is cardarine a steroid?

No. Cardarine is not an anabolic steroid; it belongs to a different chemical class that targets PPARδ. Steroids act primarily through androgen receptors, while cardarine acts through a nuclear receptor involved in metabolism.

What did animal studies find?

Some rodent studies reported increased endurance and changes in fat metabolism after cardarine exposure. Long-term studies in animals also raised concerns about cancer in certain tissues. Human trial data are limited, so these findings cannot be directly translated to people.

What is cardarine?

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.

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