If you have been reading about PPARδ agonist and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-08-08. Numbers and descriptions here follow the published literature rather than marketing material.
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 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.
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.
| 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. |
According to the American Heart Association (AHA) a chest x-ray should not be used to diagnose or assess for aortic dissections. The AHA states that chest x-rays are not adequately sensitive nor specific to accurately diagnose aortic dissections. However, certain findings on a chest x-ray may suggest an aortic dissection. These findings include: widening of the mediastinum, disruption of the normal contour of the aortic knob, the calcium sign (a separation of more than 5 mm of the calcified intimal plaque layer from the aortic wall), a "double density" seen in the aorta, and deviation of the trachea to the right.
The recent patent literature describes the synthesis of glycocyamine by catalytic oxidation of ethanolamine to glycine and subsequent reaction with cyanamide in aqueous solution in high yield, analogous to the synthesis of creatine starting from 2-methylaminoethanol via sarcosine.
== Key issues == The agreed version of the declaration, a single sentence of just 67 words, was sent on 2 November 1917 in a short letter from Balfour to Walter Rothschild, for transmission to the Zionist Federation of Great Britain and Ireland. The declaration contained four clauses, of which the first two promised to support "the establishment in Palestine of a national home for the Jewish people", followed by two "safeguard clauses" with respect to "the civil and religious rights of existing non-Jewish communities in Palestine", and "the rights and political status enjoyed by Jews in any other country".
Sources: en.wikipedia.org
The peptide sequence tag approach developed at the EMBL was one of the first methods for the identification of peptides based on mass spectra and genome data. Nano-electrospray (an electrospray technique with very low flow rates) was the first method that allowed femtomole sequencing of proteins from polyacrylamide gels. A recently developed metabolic labeling technique called SILAC (stable isotope labeling with amino acids in cell culture) is widely used in quantitative proteomics.
In food packaging, sealing plays an important role in ensuring food safety, product preservation, and package integrity. Sealing is used to hermetically close bags made of plastic or multilayer materials, such as pouches, trays, or flexible films. More employed techniques in food industry include heat sealing, which requires the use of hot air, ultrasound, or induction to generate heat, laser sealing, and cold sealing. These processes guarantee a barrier against external agents, such as oxygen, moisture, light, and microorganisms, preventing contamination and extending the product's shelf life. The quality of the seal is a critical parameter: a defective seal can lead to the degradation of organoleptic properties and also compromise food safety. For this reason, the food industry adopts international quality control standards to assess the integrity of the sealing.
Since its 1947 independence, India has significantly reduced historically endemic diseases, though some remain intractable. The country was certified smallpox-free in April 1977 following two years of surveillance after its last Variola major case. It was officially certified polio-free by the World Health Organisation on 27 March 2014, after successfully completing three consecutive years without recorded cases of wild poliovirus. In contrast, cholera remains endemic to Ganges-Meghna Delta estuaries, resulting in seasonal outbreaks caused by monsoons and water supply network shortcomings. Tuberculosis is a major concern; India bears a quarter of the global tuberculosis disease burden. Historical malaria cases have dropped from millions to hundreds of thousands annually, but India experiences localised seasonal increases caused by drug-resistant variants of the Plasmodium falciparum and Plasmodium vivax vectors. Patients in India often face a stark choice: use basic, free, publicly funded health care or pay high out-of-pocket fees for better-equipped care from private doctors and hospitals. This divide is particularly severe outside cities, as public clinics in rural areas rarely have enough doctors or nurses to meet local demands. When serious medical emergencies occur, poorer families are often forced to sell land or take out high-interest loans to pay for private care. This resulting medical debt pushes approximately 55 million people into poverty every year.
Pholcus phalangioides are sexually dimorphic, where females are slightly larger than the males of the species. The body length of this species varies between males and females. Males tend to be around 6 to 10 mm in length with the average male being around 6 mm. The average female ranges from 7 to 8 mm in length. As indicated by their common name, "daddy long-legs" (in North America), these spiders boast eight very long and thin legs which are covered in thin, grey bristles. On average, their legs are roughly 5 to 6 times as long as the spider's body. The average length of an adult female's legs is roughly 50 mm. The bodies of P. phalangioides, as with all spiders, can be divided into two parts: the prosoma and the opisthosoma. The prosoma is commonly known as the cephalothorax, and the opisthosoma is commonly known as the abdomen. Most of the prosoma is occupied by the brain. The opisthosoma is considered the posterior part of the body which contains most of the spider's internal organs including the heart, respiratory system, mid-gland, reproductive system, genital tract and silk glands. The translucent bodies of P. phalangioides tend to be a grey-pale brown color with a dark spot on the back of the prosoma and some dark, blurred spots on the dorsal side of the opisthosoma. Although some other members of the family Pholcidae have six eyes, Pholcus phalangioides is an eight-eyed spider. The eyes are arranged such that there is a pair of smaller, dark eyes at the front of the prosoma followed by three parallel rows of pairs of larger eyes.
Sources: en.wikipedia.org
== Early life == Hofmeister's father was a doctor in Prague, where Hofmeister first began his studies, under the physiologist Karl Hugo Huppert, himself a student of Carl Lehmann. Hofmeister's Habilitationsschrift in 1879 concerned the peptic products of digestion. Hofmeister became a Professor of Pharmacology at the First Faculty of Medicine, Charles University in Prague in 1885, then eventually moved to Strasbourg in 1896.
== Types == Nano-materials are often categorized as to how many of their dimensions fall in the nanoscale. A nanoparticle is defined a nano-object with all three external dimensions in the nanoscale, whose longest and the shortest axes do not differ significantly. A nanofiber has two external dimensions in the nanoscale, with nanotubes being hollow nanofibers and nanorods being solid nanofibers. A nanoplate/nanosheet has one external dimension in the nanoscale, and if the two larger dimensions are significantly different it is called a nanoribbon. For nanofibers and nanoplates, the other dimensions may or may not be in the nanoscale, but must be significantly larger. In all of these cases, a significant difference is noted to typically be at least a factor of 3. Nanostructured materials are often categorized by what phases of matter they contain. A nanocomposite is a solid containing at least one physically or chemically distinct region or collection of regions, having at least one dimension in the nanoscale. A nanofoam has a liquid or solid matrix, filled with a gaseous phase, where one of the two phases has dimensions on the nanoscale. A nanoporous material is a solid material containing nanopores, voids in the form of open or closed pores of sub-micron lengthscales. A nanocrystalline material has a significant fraction of crystal grains in the nanoscale.
The collections of the Library of Congress include more than 32 million catalogued books and other print materials in 470 languages; more than 61 million manuscripts; the largest rare book collection in North America, including the rough draft of the Declaration of Independence, a Gutenberg Bible (originating from the Saint Blaise Abbey, Black Forest—one of only three perfect vellum copies known to exist); over 1 million U.S. government publications; 1 million issues of world newspapers spanning the past three centuries; 33,000 bound newspaper volumes; 500,000 microfilm reels; U.S. and foreign comic books—over 12,000 titles in all, totaling more than 140,000 issues; 1.9 million moving images (as of 2020); 5.3 million maps; 6 million works of sheet music; 3 million sound recordings; more than 14.7 million prints and photographic images including fine and popular art pieces and architectural drawings; the Betts Stradivarius; and the Cassavetti Stradivarius. The library developed a system of book classification called Library of Congress Classification (LCC), which is used by most U.S. research and university libraries. The library serves as a legal repository for copyright protection and copyright registration, and as the base for the United States Copyright Office. Regardless of whether they register their copyright, all publishers are required to submit two complete copies of their published works to the library—this requirement is known as mandatory deposit. Nearly 15,000 new items published in the U.S. arrive every business day at the library.
In some other invertebrates such as earthworms, the circulatory system is not used to transport oxygen and so is much reduced, having no veins or arteries and consisting of two connected tubes. Oxygen travels by diffusion and there are five small muscular vessels that connect these vessels that contract at the front of the animals that can be thought of as "hearts". Squids and other cephalopods have two "gill hearts" also known as branchial hearts, and one "systemic heart". The branchial hearts have two atria and one ventricle each, and pump to the gills, whereas the systemic heart pumps to the body.
=== Differential diagnosis === The histopathological features associated with coeliac disease can arise from other conditions as well. Differential diagnosis of negative coeliac blood tests and villous atrophy or increased inter-epithelial lymphocytes includes tropical sprue, eosinophilic gastroenteritis, lactose intolerance, lymphoma, Crohn's disease, Helicobacter pylori, drug-induced enteropathy (azathioprine, methotrexate, mycophenolate, olmesartan, colchicinenon, non-steroidal anti-inflammatory drugs, and proton pump inhibitors), Whipple's disease, giardiasis, radiation enteritis, tuberculosis, Zollinger–Ellison syndrome, collagenous sprue, common variable immunodeficiency, autoimmune enteropathy, HIV enteropathy, small intestinal bacterial overgrowth, and gastrinoma with acid hypersecretion. If the histological changes improve with a gluten-free diet despite negative coeliac disease blood tests, a diagnosis of seronegative coeliac disease may be made. Positive blood tests for coeliac disease with a lack of changes in the bowels can be caused by errors in collecting blood for the test, recent infections, congestive heart failure, chronic liver disease, and hypergammaglobulinemia. Potential coeliac disease, formerly known as "latent coeliac disease", is diagnosed when there are positive coeliac blood tests, positive HLA genetic testing, and a lack of villous atrophy. Non-celiac gluten sensitivity (NCGS) is a functional disorder that causes intestinal and extraintestinal symptoms in response to gluten.
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.
No. Cardarine is GW501516, a PPARδ agonist, while SARMs act on androgen receptors. The two classes are often grouped in informal discussions despite different mechanisms.