Everything below concerns Preclinical research. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-08-14. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
| 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. |
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 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.
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.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
Records of attempts at pregnancy testing have been found as far back as the ancient Greek and ancient Egyptian cultures. The ancient Egyptians watered bags of wheat and barley with the urine of a possibly pregnant woman. Germination indicated pregnancy. The type of grain that sprouted was taken as an indicator of the fetus's sex. Hippocrates suggested that a woman who had missed her period should drink a solution of honey in water at bedtime: resulting abdominal distention and cramps would indicate the presence of a pregnancy. Avicenna and many physicians after him in the Middle Ages performed uroscopy, a nonscientific method to evaluate urine. Selmar Aschheim and Bernhard Zondek introduced testing based on the presence of human chorionic gonadotropin (hCG) in 1928. Early studies of hCG had concluded that it was produced by the pituitary gland. In the 1930s, Doctor Georgeanna Jones discovered that hCG was produced not by the pituitary gland, but by the placenta. This discovery was important in relying on hCG as an early marker of pregnancy. In the Aschheim and Zondek test, an infantile female mouse was injected subcutaneously with urine of the woman to be tested, and the mouse later was killed and dissected. Presence of ovulation indicated that the urine contained hCG and meant that the subject was pregnant. A similar test was developed using immature rabbits.
In Australia, the Chinese Medicine Board of Australia regulates acupuncture, among other Chinese medical traditions, and restricts the use of titles like 'acupuncturist' to registered practitioners only. The practice of Acupuncture in New Zealand in 1990 acupuncture was included into the Governmental Accident Compensation Corporation (ACC) Act. This inclusion granted qualified and professionally registered acupuncturists the ability to provide subsidised care and treatment to citizens, residents, and temporary visitors for work- or sports-related injuries that occurred within the country of New Zealand. The two bodies for the regulation of acupuncture and attainment of ACC treatment provider status in New Zealand are Acupuncture NZ, and The New Zealand Acupuncture Standards Authority. At least 28 countries in Europe have professional associations for acupuncturists. In France, the Académie Nationale de Médecine (National Academy of Medicine) has regulated acupuncture since 1955.
The Journal of Peptide Science is a monthly peer-reviewed scientific journal, published since 1995 by John Wiley & Sons on behalf of the European Peptide Society. The current editor-in-chief is Paolo Rovero (Universita di Firenze).
Acanthamoeba infection Amebiasis cutis Ant sting Arachnidism Baker's itch Balamuthia infection Bedbug infestation (bedbug bite, cimicosis) Bee and wasp stings Blister beetle dermatitis Bombardier beetle burn Bristleworm sting Centipede bite Cheyletiella dermatitis Chigger bite Coolie itch Copra itch Coral dermatitis Creeping eruption (cutaneous larva migrans) Cutaneous leishmaniasis (Aleppo boil, Baghdad boil, bay sore, Biskra button, Chiclero ulcer, Delhi boil, Kandahar sore, Lahore sore, leishmaniasis tropica, oriental sore, pian bois, uta) Cysticercosis cutis Demodex folliculitis, usually caused by the Demodex folliculorum mite Dogger Bank itch Dracunculiasis (dracontiasis, guinea worm disease, Medina worm) Echinococcosis (hydatid disease) Elephantiasis tropica (elephantiasis arabum) Elephant skin Enterobiasis (oxyuriasis, pinworm infection, seatworm infection) Erisipela de la costa Feather pillow dermatitis Funnel web spider bite Gamasoidosis Gnathostomiasis (larva migrans profundus) Grain itch (barley itch, mattress itch, prairie itch, straw itch) Grocer's itch Head lice infestation (cooties, pediculosis capitis) Hookworm disease (ancylostomiasis, ground itch, necatoriasis, uncinariasis) Human trypanosomiasis Hydroid dermatitis Irukandji syndrome Jellyfish dermatitis Ked itch Larva currens Latrodectism (widow spider bite) Leech bite Leopard skin Lepidopterism (Caripito itch, caterpillar dermatitis, moth dermatitis) Lizard skin Loaiasis (Calabar swelling, fugitive swelling, loa loa, tropical swelling) Loxoscelism (brown recluse spider bite, necrotic cutaneous loxoscelism) Mal morando Millipede burn Mosquito bite Mucocutaneous leishmaniasis (espundia, leishmaniasis Americana) Myiasis Nairobi fly dermatitis (Kenya fly dermatitis, Nairobi eye) Nematode dermatitis Norwegian scabies (crusted scabies) Onchocerciasis Ophthalmia nodosa Paederus dermatitis Pediculosis corporis (pediculosis vestimenti, Vagabond's disease) Pediculosis pubis (crabs, phthirus pubis, phthirus pubis, pubic lice) Pneumocystosis (often classified as fungal) Portuguese man-of-war dermatitis Post-kala-azar dermal leishmaniasis (post-kala-azar dermatosis) Protothecosis Pulicosis (flea bites) Reduviid bite Scabies (itch mite infestation, seven-year itch) Scorpion sting Sea anemone dermatitis Seabather's eruption (sea lice) Sea urchin injury Seaweed dermatitis Snake bite Sowda Sparganosis Spider bite Stingray injury Swimmer's itch (cercarial dermatitis, schistosome cercarial dermatitis) Tarantula bite Tick bite Toxoplasmosis Trichinosis Trichomoniasis Tungiasis (bicho de pie, chigoe flea bite, jigger bite, nigua, pique) Visceral leishmaniasis (dumdum fever, kala-azar) Visceral schistosomiasis (bilharziasis) Viscerotropic leishmaniasis Wheat warehouse itch
Immigration status: In 2018 many lawfully present immigrants who were eligible for coverage remained uninsured because immigrant families faced a range of enrollment barriers, including fear, confusion about eligibility policies, difficulty navigating the enrollment process, and language and literacy challenges. Uninsured undocumented immigrants are ineligible for coverage options due to their immigration status. Health care access: Lack of health insurance and financial concerns about accessing care were associated with delays in seeking emergency care for acute myocardial infarction which can have significant, adverse consequences on patient outcomes. Education: Researchers found that compared to people with graduate degrees, those with lower educational attainment appeared to have a higher risk of heart attack, dying from a cardiovascular event, and overall death.
Sources: en.wikipedia.org
== Broadcast == Matlock premiered with a sneak peek on September 22, 2024, before its timeslot premiere on October 17 on CBS. In Canada, the series airs on Global and is available to stream on StackTV. The second season premiered on October 12, 2025. In Australia, the show premiered on Channel Ten on the November 11, 2024 and has continued to air its second season through January 2026 and also airs on Paramount+. In Croatia, the show premiered on national HRT 1 starting with the first season on the 15th. June 2026.
The parietal serous pericardium, which lines the interior side of the superficial portion of the pericardial sac, is fused to and inseparable from the fibrous pericardium The visceral serous pericardium, also known as the epicardium, covers the myocardium of the heart and can be considered its serosa. It is largely made of a mesothelium overlying some elastin-rich loose connective tissue. During ventricular contraction, the wave of depolarization moves from the endocardial to the epicardial surface. Both of these layers function in lubricating the heart to prevent friction during heart activity. The visceral serous pericardium extends to the root of the great vessels and joins the parietal serous pericardium at the anatomical base of the heart. This junction occurs at two areas: the ventricular outflow tracts where the aorta and pulmonary trunk leave the heart, and the inflow tracts where the superior/inferior vena cava and pulmonary veins enter the heart. The root of the great vessels and the associated reflections of the serous pericardium creates various smaller sacs and tunnels known as pericardial sinuses, as well as radiographically significant pericardial recesses, where pericardial fluid can pool and mimic mediastinal lymphadenopathy.
The tiger snake (Notechis scutatus) is highly venomous. Its venom possesses potent neurotoxins, coagulants, haemolysins and myotoxins and the venom is quick-acting with rapid onset of breathing difficulties and paralysis. The untreated mortality rate from tiger snake bites is reported to be between 40 and 60%. It is a major cause of snakebites and occasional snakebite deaths in Australia. The African tiger snake (Telescopus semiannulatus), 60–70 cm long, on the other hand, is rear-fanged and only mildly venomous and not dangerous to humans.
== Background == Following his victory at the Battle of Pelagonia in 1259 AD against an anti-Nicaean coalition, Nicaean emperor Michael VIII Palaiologos was left free to pursue the reconquest of Constantinople, a primary goal of the Byzantine rump states in both Epirus and Asia Minor since 1204. By 1259 the remnants of the Latin Empire were reduced to the city of Constantinople and its immediate environs, cut off from both the remaining Latin states of Greece and from the Nicaeans' Greek rival, the Despotate of Epirus. As early as 1260, Michael Palaiologos attacked Constantinople, as one of the Latin knights taken prisoner in Pelagonia, whose house was within the city walls, had promised to open a gate for the emperor's troops. He failed to do so, and Palaiologos launched an unsuccessful assault on Galata instead. To strengthen his position, Michael concluded an alliance with Genoa in March 1261. In July 1261, as the one-year truce agreed upon after the failed Nicaean siege of 1260 was nearing its end, the general Alexios Strategopoulos was sent with a small advance force of 800 soldiers (most of them Cumans) to keep a watch on the Bulgarians and to reconnoiter the Latin defenses of the city.
Sources: en.wikipedia.org
For the 2005 sequel The Ring Two, Chase was credited due to the use of archival footage from the first film, although actress Kelly Stables performed all the new on-screen material and motion capture for Samara. Between 2003 and 2004, Chase held a main cast role as Joyce, the quirky girlfriend of the title character, in the Fox period sitcom Oliver Beene. Her other notable credits during this period included the direct-to-video film Beethoven's 5th (2003) and the romantic comedy Carolina (2003), in which she played the younger version of Julia Stiles' character.
==== Drawbacks ==== This mechanism for resolving biological homochirality relies heavily on the prebiotic synthesis of RAO, and assumes that it is the prebiotic precursor to nucleic acids. The crystallization efficiency of compounds depends on their concentration, and RAO would need to be saturated in solution for enantioselective crystallization to occur. This could be achieved through frequent wet-dry cycles, which would also remove diastereomers of RAO which are also produced in prebiotic reactions and can modify its crystal habit.
Tofisopam has been shown to act as an inhibitor of the liver enzyme CYP3A4, and some researches suspect that this could cause dangerous drug interactions with other medications metabolised by this enzyme, although the clinical significance of these findings remains unclear.
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 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.