Cardarine 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 2026-05-10 and is reviewed periodically as new material appears.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| CAS Registry Number | 317318-70-0 | Unique identifier for the compound. |
| Chemical class | PPARδ agonist | Synthetic ligand for peroxisome proliferator-activated receptor delta. |
| Appearance | White to off-white solid | Typical form of research-grade material. |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water. |
| Typical storage | -20°C | Recommended for long-term storage of stock solutions. |
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.
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.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
Regarding artistic influences, Levine cited the books Nineteen Eighty-Four and Logan's Run, representing societies that have "really interesting ideas screwed up by the fact that we're people". The idea of the mind control used on Jack was offered by LeBreton, inspired by films like The Manchurian Candidate, as a means to provide a better reason to limit the player's actions as opposed to the traditional use of locked doors to prevent them exploring areas they should not. The team had agreed that Jack's actions would be controlled by a key phrase but struggled with coming up with one that would not reveal Atlas' true nature. Levine happened upon "Would you kindly" after working on marketing materials for the game that asked the reader hypothetical questions such as "Would you kill people, even innocent people, to survive?", later working that phrase into the first script for the game. Levine's cultural background unintentionally influenced the game's themes, with the game's characters reflecting his culturally, but not religious, Jewish background. In the 2018 interview, Levine recognized several of the characters, including Andrew Ryan (who was inspired by Ayn Rand who was also Jewish), Sander Cohen, and Brigid Tenenbaum, were written all as Jewish, and all seeking to escape a world they felt they did not fit into by going to Rapture; Levine said: "'There's literal displacement and then there's a feeling of not fitting in, of 'I don't really belong here'. I think Jews are always going to feel a little bit like they don't belong wherever they are.
Humanistic psychology was developed in the 1950s in reaction to both behaviorism and psychoanalysis, largely due to the person-centered therapy of Carl Rogers (often referred to as Rogerian Therapy) and existential psychology developed by Viktor Frankl and Rollo May. Rogers believed that a client needed only three things from a clinician to experience therapeutic improvement—congruence, unconditional positive regard, and empathetic understanding. By using phenomenology, intersubjectivity and first-person categories, the humanistic approach seeks to get a glimpse of the whole person and not just the fragmented parts of the personality. This aspect of holism links up with another common aim of humanistic practice in clinical psychology, which is to seek an integration of the whole person, also called self-actualization. From 1980, Hans-Werner Gessmann integrated the ideas of humanistic psychology into group psychotherapy as humanistic psychodrama. According to humanistic thinking, each individual person already has inbuilt potentials and resources that might help them to build a stronger personality and self-concept. The mission of the humanistic psychologist is to help the individual employ these resources via the therapeutic relationship.
Currently metopon, which has a DEA ACSCN of 9260, does not have an annual manufacturing quota listed in the Federal Register and the bulk of the research on the drug at this time is taking place in Germany, Switzerland, and Austria.
Sources: en.wikipedia.org
== Relationship with humans == Prior to the 1970s, the white shark as a species was known mostly to biologists and fishermen. The 1971 documentary Blue Water, White Death is credited with introducing the species to the public. Its popularity grew further following Peter Benchley's 1974 novel Jaws, and its 1975 film adaptation, directed by Steven Spielberg. Both works established the species' image as a dangerous man-eater, a characterization Benchley later regretted. Compared to other fish, the white shark was not a significant commercial species. Although its meat was considered edible, the difficulty of capture made commercial fishing impractical. However, its size and reputation made it a popular target for sport fishing. Typically, sharks were lured with chum (ground bait) before being presented with a hook. Port Lincoln, South Australia, became a hub for white shark fishing in the 1950s. In 1959, a fisherman named Alf Dean caught a 1,208 kg (2,663 lb) shark there, setting the record for the largest fish caught by rod and reel. A larger shark caught in Streaky Bay was later disqualified due to the bait used.
This new framework allows the user to mix models and take advantages of the efficiency of Bayesian MCMC analysis when dealing with different type of data (e.g. protein, nucleotide, and morphological). It uses the Metropolis-Coupling MCMC by default. MrBayes 3.2 was released in 2012. This version allows the users to run multiple analyses in parallel. It also provides faster likelihood calculations and allow these calculations to be delegated to graphics processing unites (GPUs). Version 3.2 provides wider outputs options compatible with FigTree and other tree viewers.
=== Heart disease, diabetes and quality of life === Blackburn also discovered that mothers caring for very sick children have shorter telomeres when they report that their emotional stress is at a maximum and that telomerase was active at the site of blockages in coronary artery tissue, possibly accelerating heart attacks. In 2009, it was shown that the amount of telomerase activity significantly increased following psychological stress. Across the sample of patients telomerase activity in peripheral blood mononuclear cells increased by 18% one hour after the end of the stress. A study in 2010 found that there was "significantly greater" telomerase activity in participants than controls after a three-month meditation retreat. Telomerase deficiency has been linked to diabetes mellitus and impaired insulin secretion in mice, due to loss of pancreatic insulin-producing cells.
Sources: en.wikipedia.org
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.
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.
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.
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.