A practical reference on PPARδ: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-06-29 and is reviewed periodically as new material appears.
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.
Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
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.
In the fitness and bodybuilding literature, cardarine is frequently discussed as an endurance agent or fat-loss compound, although such claims are not supported by robust clinical evidence. Online descriptions often mix animal data, user anecdotes, and marketing language. Researchers who study PPARδ agonists distinguish between receptor activation in controlled experiments and unsupervised use of unverified products. The latter introduces unknown purity, dose, and interactions, making reported experiences difficult to interpret scientifically.
GW501516 acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in transcription of genes related to lipid handling and energy use. Activation of PPARδ can shift skeletal muscle toward greater fatty acid oxidation in animal models, which is one reason it drew interest for metabolic disease and exercise research. The exact downstream effects depend on tissue, species, dose, and duration. Human data are sparse, so many proposed benefits remain hypotheses rather than established clinical outcomes.
Laboratory studies have examined GW501516 in cell cultures and rodents for conditions such as dyslipidemia, insulin resistance, and obesity. Some trials in humans were initiated, but development was discontinued after preclinical findings raised concerns about cancer in certain models. Those findings do not prove that the compound causes cancer in people, but they contributed to regulatory caution. Later reviews often describe the evidence as preliminary and insufficient for assessing long-term safety.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport; not approved as medicine | Listed by WADA at all times. |
| Common synonyms | GW501516, GW-501516, endurobol | Cardarine is a colloquial name. |
| Typical analytical method | LC-MS/MS | Detects parent compound and metabolites. |
| Common test matrix | Urine | Blood and dried blood spots also possible. |
| Legal classification | Varies by country | Often treated as unapproved drug or research chemical. |
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.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
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.
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.
Insulin aspart, sold under the brand name Novolog, among others, is a modified type of medical insulin used to treat type 1 and type 2 diabetes. It is generally used by injection under the skin (into the abdomen, buttocks, thighs, or upper arms) but may also be used by injection into a vein. Common side effects include low blood sugar, allergic reactions, itchiness, and pain at the site of injection. Other common side effects may include injection site reactions, itching, rash, lipodystrophy (skin thickening or pitting at the injection site), weight gain and swelling of hands and feet. Other serious side effects may include low blood potassium (hypokalemia), low blood sugar (hypoglycemia), and severe allergic reactions. Use in pregnancy and breastfeeding is generally safe. It works the same as human insulin by increasing the amount of glucose that tissues take in and decreasing the amount of glucose made by the liver. It is a manufactured form of human insulin; where a single amino acid has been changed, specifically a proline with an aspartic acid at the B28 position. Insulin aspart was approved for medical use in the United States in 2000. In 2023, it was the 102nd most commonly prescribed medication in the United States, with more than 6 million prescriptions. Manufacturing involves yeast, which have had the gene for insulin aspart put into their genome. This yeast then makes the insulin, which is harvested from the bioreactor. It is on the World Health Organization's List of Essential Medicines.
The report acknowledged that "volunteers or mercenaries" entered Georgia from Russia before the Georgian military operation, adding that "some" non-peacekeeping Russian troops were present in South Ossetia and that Russian air force was already acting against Georgia before the public decision to participate in the conflict was made by the Russian leadership at 14:30 on 8 August.
== Criticisms == In 2013, studies of autologous bone marrow stem cells on ventricular function were found to contain "hundreds" of discrepancies. Critics report that of 48 reports, just five underlying trials seemed to be used, and that in many cases whether they were randomized or merely observational accepter-versus-rejecter, was contradictory between reports of the same trial. One pair of reports of identical baseline characteristics and final results, was presented in two publications as, respectively, a 578-patient randomized trial and as a 391-subject observational study. Other reports required (impossible) negative standard deviations in subsets of people or contained fractional subjects, negative NYHA classes. Overall, many more people were reported as having receiving stem cells in trials, than the number of stem cells processed in the hospital's laboratory during that time. A university investigation, closed in 2012 without reporting, was reopened in July 2013. In 2014, a meta-analysis on stem cell therapy using bone-marrow stem cells for heart disease revealed discrepancies in published clinical trial reports, whereby studies with a higher number of discrepancies showed an increase in effect sizes. Another meta-analysis based on the intra-subject data of 12 randomized trials was unable to find any significant benefits of stem cell therapy on primary endpoints, such as major adverse events or increase in heart function measures, concluding there was no benefit.
== YouTube career == Pansino began her YouTube channel in 2010 after she was encouraged by a few of her friends who also worked on YouTube, and she started making videos to get more comfortable in front of a camera. After her early baking videos gained a steady following, viewers eventually started to request more content. Because she had never seen a baking show on television or the Internet, Pansino decided to create the Nerdy Nummies series. She decided to use the last name "Pansino" online, which was her maternal grandmother’s maiden name. She later revealed that in her early years of YouTube, while she was still working as an actress, she was given the ultimatum by her agent to choose between acting and YouTube. She remained adamant that she would not quit YouTube, despite the uncertainty involved. Pansino told Cosmopolitan in 2015: "At this point, I wasn't making any money on YouTube. I knew that it was possible to do that but I wasn't making a dime. I decided, I'm going to do this. I'm not going to let YouTube go." As of April 2026, Pansino's channel has attained over 5.1 billion views and 14.8 million subscribers, making it the most popular cooking channel on YouTube. She has received several accolades. In 2013, she won the Shorty Award for Best Foodie, Chef, or Food Lover in Social Media. She has also received five Streamy Award nominations for her work on Nerdy Nummies. In 2018, Pansino officially reached 10 million subscribers on YouTube, earning her the Diamond Play Button given by the company.
22 September It is reported that eight-year-old Aditi Shankar has become the first child in the UK to receive a kidney transplant that will not require her to take medication to prevent the organ being rejected, and that she is healthy and has returned to school. In his first statement since further allegations were made against him, Russell Brand posts a video on social media describing his week as "extraordinary and distressing". 23 September The government's home energy efficiency taskforce is scrapped. Members of the anti-monarchist pressure group Republic stage what they describe as the "first-ever" protest inside Buckingham Palace. 24 September – Home Secretary Suella Braverman orders a review into armed policing, after 300 firearms officers hand in their weapons, following concerns over a police officer charged with murdering 24-year-old Chris Kaba. Most of the officers return to their duties the following day. 25 September A hearing at Manchester Crown Court determines that Lucy Letby will face a retrial for one of the six counts of attempted murder that the jury at her original trial was unable to reach a verdict on; a provisional trial date is set for 10 June 2024. The Metropolitan Police are to investigate allegations of non-recent sexual offences following recent reports about comedian Russell Brand. 26 September Home Secretary Suella Braverman tells a US think tank the 1951 Refugees Convention is no longer fit for the modern age, and that being discriminated against for being gay or female should not be enough to qualify for refugee status.
Sources: en.wikipedia.org
1808: Anna Sundström began assisting Jacob Berzelius in his laboratory, becoming one of the first Swedish women chemists. 1809: Italian pharmacist Sabina Baldoncelli earned her university degree in pharmacy but was allowed to work only in the Italian orphanage where she resided. 1815: English archaeologist and antiquarian Lady Hester Stanhope used a medieval Italian manuscript to locate a promising archaeological site in Ashkelon, becoming the first archaeologist to begin an excavation in the Palestinian region. It was one of the earliest examples of the use of textual sources in field archaeology. 1816: French mathematician and physicist Sophie Germain became the first woman to win a prize from the Paris Academy of Sciences for her work on elasticity theory. 1823: English palaeontologist and fossil collector Mary Anning discovered the first complete Plesiosaurus. 1831: Italian botanist Elisabetta Fiorini Mazzanti published her best-known work Specimen Bryologiae Romanae. 1830–1837: Belgian botanist Marie-Anne Libert published her four-volume Plantae cryptogamicae des Ardennes, a collection of 400 species of mosses, ferns, lichen, algae and fungi from the Ardennes region. Her contributions to systemic cryptogamic studies were formally recognized by Prussian king Friedrich Wilhelm III, and Libert received a gold medal of merit. 1832: French marine biologist Jeanne Villepreux-Power invented the first glass aquarium, using it to assist in her scientific observations of Argonauta argo.
Evaporated milk is made from fresh, homogenised milk from which 60% of the water has been removed. After the water has been removed, the product is chilled, stabilised, sterilised and packaged. It is commercially sterilised at 240–245 °F (116–118 °C) for 15 minutes. A slightly caramelised flavor results from the high heat process (Maillard reaction), and it is slightly darker in colour than fresh milk. The evaporation process concentrates the nutrients and the food energy (kcal); unreconstituted evaporated milk contains more nutrients and calories than does fresh milk per unit volume.
== Regulatory status == D-Ribose-L-cysteine is regulated in the United States as a dietary supplement ingredient, not as a pharmaceutical drug. Products containing D-ribose-L-cysteine are subject to dietary supplement regulations under the Dietary Supplement Health and Education Act of 1994 (DSHEA), which prohibit claims that a product can diagnose, treat, cure, or prevent disease. No pharmaceutical drug approvals or therapeutic indications have been granted for D-ribose-L-cysteine by the U.S. Food and Drug Administration.
The medical uses of bicalutamide, a nonsteroidal antiandrogen (NSAA), include the treatment of androgen-dependent conditions and hormone therapy to block the effects of androgens. Indications for bicalutamide include the treatment of prostate cancer in men, skin and hair conditions such as acne, seborrhea, hirsutism, and pattern hair loss in women, high testosterone levels in women, hormone therapy in transgender women, as a puberty blocker to prevent puberty in transgender girls and to treat early puberty in boys, and the treatment of long-lasting erections in men. It may also have some value in the treatment of paraphilias and hypersexuality in men.
Sources: en.wikipedia.org
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.
Laboratories use liquid chromatography-tandem mass spectrometry to detect GW501516 and its metabolites. Urine is commonly tested, and testing can occur in and out of competition.
No, cardarine is not a SARM. It is a PPARδ agonist, which acts on a different receptor. The two classes are often confused in online discussions.
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.