PPARδ agonist is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-09-19. Where a claim depends on a specific study, the study is described rather than over-claimed.
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 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 human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Also called GW501516 and endurobol. |
| Chemical formula | C21H18F3NO3S2 | Molecular weight about 453.5 g/mol. |
| Appearance | White to off-white solid | Form depends on synthesis and purity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, protected from light | Common for research chemicals. |
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.
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
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.
== Inventions == In 2023, she and an investigative team created a "Floor and small surface cleaner formula without water in its formulation presented in fast dissolving crystals with antibacterial effect" as well as "Compact powder Compact powder soap that dissolves quickly in the time necessary to ensure hand cleaning with moisturizing effect" those inventions were recognized by International Invention and Innovation Competition in Canada (iCAN). Her most awarded invention is the "Emulsion type cosmetic cream for face and body with moisturizing effect formulated with sinami (Oenocorpus mapora H. Karst)". This patent was created in collaboration with Dr. Luciana de la Fuente Carmelino and Mg. Juana Patricia Lozada Huancachoque, and it received the golden medals at the KIWIE Awards in 2024. Their others two inventions, that received this award, were "Formula and application method for the cleaning of cloudiness generated by weathering in glass containers" and "Toothpaste in tablet form free of water in its formulation with essential oils as antimicrobial active ingredients".
In order to appeal to as many demographic groups as possible and better compete with its competitor, Wendy's, Burger King added a multi-tiered value menu in 1993 with items priced at 99¢, US$1.99 and $2.99. The additions, part of the CEO James Adamson's back-to-basics program called Operation Phoenix, were an attempt to add not only a value menu, but also a line of value meals. The tiered menu was replaced with a more standard value menu in 1998 while the value meals were separated into their own menu segment. This value menu featured seven products: Whopper Jr., five-piece Chicken Tenders, a bacon cheeseburger, medium-sized French fries, medium soft drink, medium onion rings, and a small milkshake. In 2002 and 2006, BK revamped its value menu, adding and removing several different products such as chili and its Rodeo Cheeseburger. Many of these items have since been discontinued, modified or relegated to a regional menu option. To better appeal to a more adult palate and demographic, BK introduced several new products to its menu in 2003, including several new or revamped chicken products, a new salad line and its BK Joe brand of coffee. Some of the new products, including their Enormous Omelet Sandwich line and the BK Stacker line, brought negative attention due to the large portion size, and amounts of unhealthy fats and trans-fats. Many of these products featured higher quality ingredients like whole chicken breast, Angus beef, and natural cheeses such as cheddar and pepper jack. Again, not all these products, such as the BK Baguette line, have met sales expectations.
=== Other signs and symptoms === People with fibromyalgia may experience hyperalgesia (abnormally increased sensitivity to pain) and allodynia (pain from a stimulus that does not normally elicit pain). People with FM may be intolerant to bright lights, loud noises, perfumes, and cold. Other symptoms may be musculoskeletal stiffness, environmental sensitivity, hypervigilance, sexual dysfunction, and visual symptoms. Nocturnal myoclonus can be present in people with fibromyalgia. A 2021 review found that fibromyalgia can also cause ocular discomfort (foreign body sensation and irritation) and visual disturbances (blurred vision).
A countercurrent multiplication loop is a system where fluid flows in a loop so that the entrance and exit are at similar low concentration of a dissolved substance but at the far end of the loop there is a high concentration of that substance. A buffer liquid between the incoming and outgoing tubes receives the concentrated substance. The incoming and outgoing tubes do not touch each other. The system allows the buildup of a high concentration gradually, by allowing a natural buildup of concentration towards the tip inside the in-going tube, (for example using osmosis of water out of the input pipe and into the buffer fluid), and the use of many active transport pumps each pumping only against a very small gradient, during the exit from the loop, returning the concentration inside the output pipe to its original concentration. The incoming flow starting at a low concentration has a semipermeable membrane with water passing to the buffer liquid via osmosis at a small gradient. There is a gradual buildup of concentration inside the loop until the loop tip where it reaches its maximum. Theoretically a similar system could exist or be constructed for heat exchange. In the example shown in the image, water enters at 299 mg/L (NaCl / H2O). Water passes because of a small osmotic pressure to the buffer liquid in this example at 300 mg/L (NaCl / H2O). Further up the loop there is a continued flow of water out of the tube and into the buffer, gradually raising the concentration of NaCl in the tube until it reaches 1199 mg/L at the tip.
Sources: en.wikipedia.org
=== Acute wounds === An acute wound is any wound which results from direct trauma and progresses through the four stages of wound healing along an expected timeline. The first stage, hemostasis, lasts from minutes to hours after initial injury. This stage is followed by the inflammatory phase which typically lasts 1 to 3 days. Proliferation is the third stage of wound healing and lasts from a few days up to a month. The fourth and final phase of wound healing, remodeling/scar formation, typically lasts 12 months but can continue as long as 2 years after the initial injury. Acute wounds can further be classified as either open or closed. An open wound is any injury whereby the integrity of the skin has been disrupted and the underlying tissue is exposed. A closed wound, on the other hand, is any injury in which underlying tissue has been damaged but the overlying skin is still intact.
=== Use and abuse === Flupentixol/melitracen is the single most popular antidepressant in China, according to 2013–2018 prescription data. It is generally not prescribed by psychiatrists, but by clinicians working in other areas, mainly gastroenterologists, cardiologists, endocrinologists, neurologists, even general physicians and surgeons. Only when a patient encounters a side effect on this drug are they referred to a psychiatrist. DXY.cn notes a significant lack of evidence-based guidance on using and discontinuing this medication despite its widespread use in China. Adverse effects from longer-term use and withdrawal symptoms have been reported. Self-medication with this drug used to be common in India; it still is in China, where pharmacies exercise little care to ensure the existence of a prescription. It is also easily obtained in Lebanon without a prescription. In a study of Lebanese emergency department patients who take flupentixol/melitracen, 36% (45 out of 125) were diagnosed as having a substance use disorder for this medication under the DSM-V criteria. Among Jordanian pharmacists, 70.6% were willing to dispense the medication in situations including malpractice.
Cox Plate (2009, 2010), Tattersalls Gold Cup (2011, 2012), Prince of Wales's Stakes (2012) (foaled 2006). (death announced on this date) 23 October – Piera McArthur, painter (born 1929). 27 October – Robert Neale, literary scholar and university orator (Massey University) (born 1933). 29 October – Mick Bremner, rugby union player (Auckland, Canterbury, national team) (born 1930). 30 October – Alan Vest, association football player (Perth Azzurri, national team) and manager (Sarawak FA, Perth Glory) (born 1939). 31 October Chris Barfoot, realtor (Barfoot & Thompson), conservationist (Tahuna Torea Nature Reserve), and pacifist, secretary of Anglican Pacifist Fellowship New Zealand (1962–1968, 1992–2016) (born 1930). Tim Finn, viticulturist (Neudorf Vineyards) (born 1946).
Sources: en.wikipedia.org
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.
It activates PPARδ, a nuclear receptor that influences gene expression related to lipid and energy metabolism. Animal studies show changes in endurance and lipid levels. Human effects and risks are not well established.
No, cardarine is not a steroid. It belongs to a different chemical class, the PPARδ agonists. It is also not a selective androgen receptor modulator.
Anti-doping and clinical laboratories commonly use liquid chromatography-tandem mass spectrometry. The method can identify GW501516 and its metabolites in urine or blood. Detection depends on sample timing and the amount present.