Anti-doping 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 2026-05-20. Where a claim depends on a specific study, the study is described rather than over-claimed.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
The pharmacological interest in cardarine centers on PPARδ activation and its downstream effects on lipid handling and mitochondrial function. In animal studies, PPARδ agonists have been associated with changes in exercise endurance and fatty acid utilization, though results vary by model and protocol. Human data remain sparse, and the absence of large controlled trials limits conclusions about efficacy. Researchers often describe the compound as a tool for probing PPARδ biology rather than a proven therapeutic agent.
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516, GW-501516, GW 501516, endurobol | Names vary in research and anti-doping documents. |
| Chemical class | Synthetic PPARδ agonist | Small-molecule nuclear receptor ligand. |
| CAS Registry Number | 317318-70-0 | Identifier commonly associated with GW501516. |
| Appearance | White to off-white powder | Typical for purified research material. |
| Solubility | Low in water; soluble in DMSO and ethanol | Organic solvents are common for laboratory stock solutions. |
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.
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.
== Clinical significance == CTGF is associated with wound healing and virtually all fibrotic pathology. It is thought that CTGF can cooperate with TGF-β to induce sustained fibrosis and to exacerbate extracellular matrix production in association with other fibrosis-inducing conditions. Overexpression of CTGF in fibroblasts promotes fibrosis in the dermis, kidney, and lung, and deletion of Ctgf in fibroblasts and smooth muscle cells greatly reduces bleomycin-induced skin fibrosis. In addition to fibrosis, aberrant CTGF expression is also associated with many types of malignancies, diabetic nephropathy and retinopathy, arthritis, and cardiovascular diseases. Several clinical trials are now ongoing that investigate the therapeutic value of targeting CTGF in fibrosis, diabetic nephropathy, and pancreatic cancer. CTGF (CCN2) has recently been implicated in mood disorders, notably in the postpartum period; these effects may be mediated by its effects on myelination
2 EsX3 + H2 → 2 EsX2 + 2 HX; X = F, Cl, Br, I Einsteinium(II) chloride (EsCl2), einsteinium(II) bromide (EsBr2) and einsteinium(II) iodide (EsI2) have been produced and characterized by optical absorption, with no structural information available yet. Known oxyhalides of einsteinium include EsOCl, EsOBr and EsOI. These salts are synthesized by treating a trihalide with a vapor mixture of water and the corresponding hydrogen halide: for example, EsCl3 + H2O/HCl to obtain EsOCl.
=== Cancer === A 2020 study found that ADAM10 enhances the proliferation, migration, and invasion of osteosarcoma cells by modulating the E-cadherin/β-catenin signaling pathway, with miR-122-5p identified as a regulatory upstream target of ADAM10, suggesting that the miR-122-5p/ADAM10 axis may represent a potential therapeutic target for osteosarcoma.
Sources: en.wikipedia.org
The white pulp of the cupuaçu has an odour described as a mix of chocolate and pineapple and is frequently used in desserts, juices and sweets. The juice tastes primarily like pear, banana, passion fruit, and melon. Chocolate made from cupuaçu, very similar to that made from cocoa, is called cupulate.
It probably happens because the digestive system senses and signals forthcoming delivery of sugars, inhibiting fatty acid release and oxidation, and starving glycogen-less muscle cells of the sole available source of energy. Even simple continuous exercise, like walking or washing dishes by hand right after the meal, may trigger rhabdomyolysis in the exercising muscles. This rhabdomyolysis is probably not of exertional, but of hypoglycemic nature, as loaded glycogen-less muscles can rapidly remove glucose from blood, and the normal mechanism of glucose homeostasis lacks the required responsiveness or capacity to prevent hypoglycemia. The broken down myocytes probably do not yield much glucose. Unlike the case with exertional rhabdomyolysis, there is no warning. At rest, however, the liver will effortlessly cover the whole body energy needs until absorption of carbohydrates occurs. If a large group of muscles is still actively drawing fuels from blood after the most recent continuous exercise, in order to replenish the ATP and the phosphocreatine reserve, it may become sour without any additional exercise by the time the carbohydrate meal is finished. If the carbohydrate meal consists of a food (which doesn't need to be carbohydrate itself), that requires prolonged vigorous chewing, and then some time to be digested, for instance parboiled long grain rice, chewing may suddenly become very slow and difficult halfway through the meal.
Members of the parliament of the Free State would be required to take an oath of allegiance to the Constitution of the Free State and to declare that they would be "faithful" to the king (a modification of the oath taken in other dominions). The Second Dáil ratified the Treaty on 7 January 1922, causing a split in the republican movement. A Provisional Government was formed, with Michael Collins as chairman. The Free State was established on 6 December 1922, and the Provisional Government became the Executive Council of the Irish Free State, headed by W. T. Cosgrave as President of the Executive Council. The following day, the Commons and the Senate of Northern Ireland passed resolutions "for the express purpose of opting out of the Free State". Two days after the founding of the Irish Free State, anti-Treaty IRA members opened fire on Seán Hales and Pádraic Ó Máille, both Teachtaí Dála (TDs), as they were leaving the Dáil. Hales was killed, while Ó Máille was seriously wounded. On 8 December 1922, four imprisoned leaders of the anti-treaty IRA (Liam Mellows, Rory O'Connor, Joe McKelvey and Dick Barrett) were executed in retaliation for the killing of Hales.
Sources: en.wikipedia.org
=== Schizophrenia === People with schizophrenia have shown disrupted EEG patterns, and there is a close association of reduced delta waves during deep sleep and negative symptoms associated with schizophrenia. During slow wave sleep (stages 3 and 4), people with schizophrenia have been shown to have reduced delta wave activity, although delta waves have also been shown to be increased during waking hours in more severe forms of schizophrenia. A recent study has shown that the right frontal and central delta wave dominance, seen in healthy individuals, is absent in patients with schizophrenia. In addition, the negative correlation between delta wave activity and age is also not observed in those with schizophrenia.
The drugs are administered sequentially rather than together for practical and ethical reasons. A mixture could cause the drugs to precipitate from solution, thereby reducing drug delivery and risking pain due to vascular blockage. The potassium chloride, in particular, would cause severe pain as it travels through the bloodstream and distress as it acts upon the heart, were the person not first rendered fully unconscious. The intravenous tubing leads to a room next to the execution chamber, usually separated from the condemned by a curtain or wall. Typically, a prison employee trained in venipuncture inserts the needle, while a second prison employee orders, prepares, and loads the drugs into the lethal injection syringes. Two other staff members take each of the three syringes and secure them into the IVs. After the curtain is opened to allow the witnesses to see inside the chamber, the condemned person is then permitted to make a final statement. Following this, the warden signals that the execution may commence, and the executioner(s) (either prison staff or private citizens depending on the jurisdiction) then manually inject the three drugs in sequence. During the execution, the condemned's cardiac rhythm is monitored. Death is pronounced after cardiac activity stops. Death usually occurs within seven minutes; however, due to complications in finding a suitable vein, the entire procedure can take up to two hours, as was the case with the execution of Christopher Newton on May 24, 2007.
Additionally, Lagin has written (1967 to present) a large collection of texts titled Photo/Art Notes about nature and art, photography, metaphysics, the lives of pictures, the natural history of picture world, sand drawing, creatures, enchantment, kind-ness, seeing and being seen, beauty, self-portraits, creativity, imagination, the universe, and more. From his When You Look At A Picture: when you look at a picture the picture looks at you From his Art: art is nature spirit animating form a way of being present personal individual creature to creature timeless and timefull From his The Universe Knows: the universe knows
In September 2017, the company announced it would acquire Rigontec, developer of a candidate to target the retinoic acid-inducible gene I pathway, for $554 million. In October 2017, the company granted the inaugural Merck-AGITG Clinical Research Fellowship in Gastro-Intestinal (GI) Cancer to David Lau, a professional in Melbourne, Australia. In June 2018, Merck acquired Viralytics, an Australian viral cancer drug company, for AUD$502 million. In 2018, Merck began the submission process for a Biologics License Application to the Food and Drug Administration under the Breakthrough Therapy Designation for an investigational vaccine, called V920, to fight the Zaire strain of the Ebola virus. In April 2019, the company acquired Immune Design for approximately $300 million, gaining access to its immunotherapy programs. It also acquired Antelliq Group for $2.4 billion, or $3.7 billion including debt. In May 2019, Merck announced it would acquire Peloton Therapeutics, developer of a HIF-2alpha inhibitor for Von Hippel–Lindau disease-associated renal cell carcinoma, for up to $2.2 billion. In June 2019, Merck announced it would acquire Tilos Therapeutics for up to $773 million. In November 2019, the company acquired Calporta, which focused on Parkinsons and Alzheimers treatments. In December 2019, Merck Animal Health acquired Vaki, an aquaculture company, from Pentair.
Sources: en.wikipedia.org
Cardarine is an investigational synthetic compound that acts as a PPARδ agonist. It is also known as GW501516 and has been studied mainly in preclinical research. It is not an approved medicine.
No. Cardarine is not a steroid hormone; it targets the nuclear receptor PPARδ. Its classification in anti-doping rules differs from anabolic steroids, though it remains prohibited in sport.
Early rodent studies reported tumor formation at multiple sites, which raised safety concerns. Sponsors stopped clinical development, and no approved human product exists.
Legal status varies by country, but cardarine is not approved as a medicine in major jurisdictions. It is often sold as a research chemical, a category that may not be lawful for human use. Buyers should check local laws and product labels carefully.