research chemical 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 2025-08-19. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
| 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. |
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
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.
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.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
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.
Wolverine continued to appear in a number of series in the 2020s, both as a solo character and as part of multiple teams. During this period, he featured as part of the Savage Avengers (2019–2023), along with Punisher, Elektra, Venom, Brother Voodoo, and Conan the Barbarian. As the "Krakoan Age" continued, Benjamin Percy wrote a new Wolverine ongoing series (vol. 7) beginning in 2020, as well as new X-Force series with Wolverine as leader. In 2022, Percy also wrote a new series titled X Lives of Wolverine and X Deaths of Wolverine, concerning time travel. In Wolverine vol. 7 #50 (May 2024), Logan finally kills Sabretooth. The "Krakoan Age" concluded in 2024. An eighth volume of Wolverine began the same year, written by Saladin Ahmed and illustrated by Martín Cóccolo and Javier Pina.
== Selective Ligands == Neuromedin U is an agonist at both the NMU1 and NMU2 subtypes, while neuromedin S is selective for NMU2, and is a more potent agonist at this subtype than neuromedin U. Several other peptide and non-peptide ligands are also available for the NMU receptors.
==== Maternity leave ==== Work is the most commonly cited reason for not breastfeeding. In 2012, Save the Children examined maternity leave laws, ranking 36 industrialized countries according to their support for breastfeeding. Norway ranked first, while the United States came in last. Maternity leave in the US varies widely, including by state. The United States does not mandate paid maternity leave for any employee; however, the Family Medical Leave Act (FMLA) guarantees qualifying mothers up to 12 weeks of unpaid leave, although most US mothers resume work earlier. A large 2011 study found that women who returned to work at or after 13 weeks after childbirth were more likely to breastfeed beyond three months.
== Properties == N-Methylethanolamine is a clear, colorless, hygroscopic, amine-like smelling liquid which is miscible with water and ethanol in any ratio. Aqueous solutions react strongly basic and are therefore corrosive. The substance is easily biodegradable and has no potential of bioaccumulation due to its water miscibility. NMEA is not mutagenic, but in the presence of nitrite, carcinogenic nitrosamines can be formed from the compound, as it is a secondary amine.
== Nutrition == Boletus edulis mushrooms are 9% carbohydrates, 3% fat, and 7% protein (table). Fresh mushrooms consist of over 80% moisture, although reported values tend to differ somewhat as moisture content can be affected by environmental temperature and relative humidity during growth and storage. The carbohydrate component contains the monosaccharides glucose, mannitol and α,α-trehalose, the polysaccharide glycogen, and the water-insoluble structural polysaccharide chitin, which accounts for up to 80–90% of dry matter in mushroom cell walls. Chitin, hemicellulose, and pectin-like carbohydrates—all indigestible by humans—contribute to the high proportion of insoluble fibre in B. edulis. The total lipid, or crude fat, content makes up 3% of the dry matter of the mushroom. The proportion of fatty acids (expressed as a % of total fatty acids) are: linoleic acid 42%, oleic acid 36%, palmitic acid 10%, and stearic acid 3%. A comparative study of the amino acid composition of eleven Portuguese wild edible mushroom species showed Boletus edulis to have the highest total amino acid content. B. edulis mushrooms are rich in the dietary minerals, sodium, iron, calcium, and magnesium, with amounts varying according to the mushroom component and to soil composition in the geographic region of China where they were sampled. They also have high content of B vitamins and tocopherols. B. edulis contains appreciable amounts of selenium, a trace mineral, although the bioavailability of mushroom-derived selenium is low.
Sources: en.wikipedia.org
=== Synthetic forms === Some synthetic compounds also have vitamin K activity in humans. One synthetic drug with vitamin K activity still used in developed countries (the UK) is menadiol sodium diphosphate. Unlike natural vitamin K, it is water-soluble and can be absorbed without the help of bile salts.
In 1947, Raleigh citizens adopted a council–manager form of government, which is still the city's current form of government. The Dorton Arena, a 7,610-seat multi-purpose arena designed by Matthew Nowicki, was opened in 1952 on the grounds of the North Carolina State Fair. It was listed in the National Register of Historic Places in 1973.
== Others == Endogenous: Adrenomedullin Apelin Asprosin Bombesin Calcitonin Carnosine CART CLIP DSIP Enteroglucagon Formyl peptide GALP GIP GRP Integrin ligands (collagens, fibrinogen, fibronectin, laminins, ICAM-1, ICAM-2, osteopontin, VCAM-1, vitronectin) Kininogens Motilin Natriuretic peptides (ANP, BNP, CNP, urodilatin) Nesfatin-1 Neuromedin B Neuromedin N Neuromedin S Neuromedin U Obestatin Osteocalcin Resistin Secretin Thymopoietin Thymosins Thymulin Urotensin-II VGF Exogenous: Lifitegrast (LFA-1 antagonist)
=== Europe === In the European Union (EU), the European Medicines Agency (EMA) defines a drug as "orphan" if it is intended for the diagnosis, prevention or treatment of a life-threatening or chronically and seriously debilitating condition affecting not more than 5 in 10,000 EU people. EMA also qualifies a drug as orphan if – without incentives – it would be unlikely that marketing the drug in the EU would generate sufficient benefit for the affected people and for the drug manufacturer to justify the investment.
Sources: en.wikipedia.org
== Contraindications == Contraindications of cyproheptadine include newborns and premature infants, nursing mothers, hypersensitivity to cyproheptadine and its ingredients, monoamine oxidase inhibitors (MAOIs), angle-closure glaucoma, stenosing peptic ulcer symptomatic prostatic hypertrophy, bladder neck obstruction, pyloroduodenal obstruction, and elderly, debilitated patients.
Robert Allan Humphreys (1930–1988), known as Laud Humphreys, was an American sociologist and Episcopal priest. He is noted for his research into sexual encounters between men in public bathrooms, published as Tearoom Trade (1970), and for the questions that emerged regarding the ethical nature of his research methods. He influenced generations of scholars who research issues related to sexuality and sexual identity.
However, comparisons with supervolcanoes are more misleading than helpful due to the different aerosols released, the likely air burst fuzing height of nuclear weapons and the globally scattered location of these potential nuclear detonations all being in contrast to the singular and subterranean nature of a supervolcanic eruption. Moreover, assuming the entire world stockpile of weapons were grouped together, it would be difficult, due to the nuclear fratricide effect, to ensure the individual weapons would go off all at once. Nonetheless, many people believe that a full-scale nuclear war would result, through the nuclear winter effect, in the human extinction, though not all analysts agree on the assumptions that underpin these nuclear winter models. On 26 September 1983, a Soviet early warning station under the command of Stanislav Petrov falsely detected 5 inbound intercontinental ballistic missiles from the US. Petrov correctly assessed the situation as a false alarm, and hence did not report his finding to his superiors. It is quite possible that his actions prevented "World War III", as the Soviet policy at that time was immediate nuclear response upon discovering inbound ballistic missiles. The world came unusually close to nuclear war in November 1983 when the Soviet Union thought that the NATO military exercise Able Archer 83 was a ruse or "cover-up" to begin a nuclear first strike. The Soviets responded by raising readiness and preparing their nuclear arsenal for immediate use. Soviet fears of an attack ceased once the exercise concluded without incident.
But when histidine18, the ε-amino group of lysine4 and the α-amino group of cysteine1 all are carbethoxylated and acetylated toxicity decreases drastically. This means that these three amino acids are not essential for toxicity on their own, but the three of them combined are. Chemical alteration of arginine13 and arginine14 by treatment of 1,2-cyclohexanedione and cleavage by trypsin decreases toxicity by a factor greater than 10. The amino acids that cause toxicity of apamin are cysteine1, lysine4, arginine13, arginine14 and histidine18.
=== Aromatase inhibitors === Aromatase inhibitors are an important class of drugs used for the treatment of breast cancer in postmenopausal women. At menopause, estrogen production in the ovaries ceases, but other tissues continue to produce estrogen through the action of the enzyme aromatase on androgens produced by the adrenal glands. When the action of aromatase is blocked, estrogen levels in post-menopausal women can drop to extremely low levels, causing growth arrest and/or apoptosis of hormone-responsive cancer 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.
Rodent studies reported increased endurance and fat oxidation after GW501516 exposure. Long-term studies also found higher rates of some tumors, which led to halted development.