Everything below concerns Cardarine. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-12-19. Numbers and descriptions here follow the published literature rather than marketing material.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular target | PPAR delta (NR1C2) | Ligand-activated nuclear receptor. |
| Primary tissues studied | Skeletal muscle, liver, adipose | Effects on fatty acid oxidation and energy use. |
| Typical detection matrix | Urine | Used in anti-doping analysis. |
| Common analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Sport regulatory class | Prohibited at all times | Listed as a metabolic modulator by WADA. |
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.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
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.
=== Testosterone === Men with low levels of testosterone can experience ED. Taking testosterone may help maintain an erection. Males with type 2 diabetes are twice as likely to have lower levels of testosterone, and are three times more likely to experience ED than non-diabetic men.
=== Primary === The eRF1 is composed of a polypeptide chain of amino acids in the shape of the letter Y. The protein is composed of 3 major domains: a stem and 2 branches. Each domain has a specific purpose and distinct folding pattern which allows the protein to function properly. While each domain is unique, they all contain the basic structure of an α-β sandwich class, which is essentially a β sheet core surrounded by α helices. Domain 1, sometimes referred to as the N domain, is constructed from a β-sheet core with 4 strands surrounded by 2 α-helices (α2 and α3). The subunits α2 and α3 coil and bind to form a hairpin structure that contains the NIKS motif, YxxCxxxF motif, and the GTS loop. These sites are hypothesized to be the primary appendage in stop codon recognition. Additionally the N-terminus is located in Domain 1, which interacts with Domain 3 in-order to maintain protein stability. Domain 3, sometimes referred to as the C domain, contains the C-terminus of the polypeptide. Additionally, the structure and function of Domain 3, referred to as the M domain, is the least known as optical limitations hinder further research. Domain 2 consists of an α-β sandwich, with one of the outer strands of the sandwich containing no secondary structure. The primary amino acid section allows the GGQ site to form. The folded structure of eRF1 is essentially mimicking the structure of a tRNA molecule. This ensures that the eRF1 machinery fits into the aminoacyl site of the ribosome.
=== PDMI === Portable Digital Media Interface (PDMI) is an interconnection between docking stations/display devices and portable media players, which includes 2-lane DisplayPort v1.1a connection. It has been ratified in February 2010 as ANSI/CEA-2017-A.
Sources: en.wikipedia.org
=== Potential complications === There is an increased risk that statin (cholesterol-reducing drugs) will cause myopathy (muscle weakness) in individuals with MADD. Anesthesia has the potential to cause malignant hyperthermia, an uncontrolled increase in body temperature, and permanent muscle damage in patients with MADD. Individuals with MADD are advised to notify their anesthesiologist about their condition prior to surgery. In most cases where myopathy is present with MADD, a second muscle disease is present and symptoms are worse than either disease in isolation.
== Adverse effects == Common adverse drug reactions (≥1% of patients) associated with ezetimibe therapy include headache and/or diarrhea (steatorrhea). Infrequent adverse effects (0.1–1% of patients) include myalgia and/or raised liver function test (ALT/AST) results. Rarely (<0.1% of patients), hypersensitivity reactions (rash, angioedema) or myopathy may occur. Cases of muscle problems (myalgia and rhabdomyolysis) have been reported and are included as warnings on the label for ezetimibe. Since NPC1L1 also regulates vitamin K uptake, the use of ezetimibe can lead to side effects in warfarin therapy.
Fillod was interviewed by Stephanie Theobald, whose article in The Guardian stated that the 3D model would be used for sex education in French schools, from primary to secondary level, from September 2016 onwards; this was not the case, but the story went viral across the world. A questionnaire in a 2019 study was administered to a sample of educational sciences postgraduate students to trace the level of their knowledge concerning the organs of the female and male reproductive system. The authors reported that about two-thirds of the students failed to name parts of the vulva, such as the clitoris and labia, even after detailed pictures were provided to them. An analysis in 2022 reported that the clitoris is mentioned in only one out of 113 Greek secondary education textbooks used in biology classes from the 1870s to present. An editorial of the Journal of Biological Education in 2026 calls for a shift in the way reproduction is taught in biology classrooms, i.e. the current strong emphasis on procreation be complemented by a greater focus on sexual pleasure. It is then suggested that this could be achieved by increasing attention within biology education to the external female reproductive organs, especially the clitoris, by accurately illustrating its detailed anatomy and clearly explaining its function.
Sources: en.wikipedia.org
It binds to and activates PPAR delta, a nuclear receptor that controls expression of genes related to fatty acid oxidation. This mechanism can alter energy metabolism in animal models. It is not a direct stimulant or fat-burning enzyme.
Early-stage trials examined lipid and glucose markers, but the development program was discontinued. Published human results are limited and do not support approved use for any indication. Claims of performance or health benefits remain unproven.
Yes. Laboratories use LC-MS/MS to detect GW501516 and its metabolites in urine. Detection depends on timing and sensitivity, but the substance is banned at all times.
Yes, WADA prohibits cardarine as a PPARδ agonist. It appears on the prohibited list and can be detected in urine or blood. Athletes using it risk sanctions.