The short version of PPAR delta fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-07-06. Anything still debated is marked as such rather than presented as settled.
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.
Sporting authorities added GW501516 to prohibited lists after it appeared in athlete samples and online markets. The World Anti-Doping Agency classifies it as a hormone and metabolic modulator, and its use can lead to an anti-doping rule violation. Some early laboratory work suggested effects on fatty acid oxidation and endurance-related metabolism in animals, but those findings do not establish safe or effective use in people. Reports of adverse events in humans are scarce and often anecdotal, which complicates risk assessment.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
| Property | Value | Notes |
|---|---|---|
| Solubility | Soluble in dimethyl sulfoxide and some organic solvents; practically insoluble in water | Solvent choice affects laboratory handling |
| Typical storage | -20 °C, desiccated, protected from light | Common condition for research samples |
| Analytical method | Liquid chromatography–tandem mass spectrometry (LC-MS/MS) | Used for identification and quantification in biological or product samples |
| Common synonyms | GW501516, GW-501516, GSK-516, Endurobol | Names found in research and anti-doping literature |
| Regulatory status | Unapproved therapeutic; prohibited in competitive sport | Status can vary by country and context |
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.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
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.
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.
=== Distinguishing origins of natural gas === Biogenic, thermogenic and abiotic methane is formed at different temperatures, which can be recorded in clumped isotope compositions of methane. Combined with conventional carbon and hydrogen isotope fingerprints and gas wetness (the abundance of low molecular weight hydrocarbon), methane clumped isotope can be used to identify the origins of methane in different types of natural gas accumulations.
== Products and price == Grameen Danone Foods Ltd. produces a yoghurt called Shokti Doi containing protein, vitamins, iron, calcium, zinc and other micronutrients aimed to fill nutritional deficits of children in Bangladesh. 'Shokti Doi' (which means 'strength yoghurt') is primarily intended for children. In 2017, a 50g cup sold for 10 Taka and 80g cup for 40 taka.
Hoffman alleged Edwards employed monopoly practices in breach of the Sherman Act because it had 70% share of the integrated vacuum pump frame systems market in the US and suppressed competition, imposing non-compete covenants on its suppliers and engaged in employee intimidation; customer threats, and bad faith litigation. In May 2021, Edwards was granted a partial, interim injunction against Hoffman selling a bellows component. Judgement declined to accept Edwards' application of Noerr–Pennington doctrine to dismiss Hoffman's anti competition counterclaim. In June 2022, the parties entered into a Confidential Settlement Agreement through which both parties' claims were dismissed with prejudice.
"True alkaloids" contain nitrogen in the heterocycle and originate from amino acids. Their characteristic examples are atropine, nicotine, and morphine. This group also includes some alkaloids that besides the nitrogen heterocycle contain terpene (e.g., evonine) or peptide fragments (e.g. ergotamine). The piperidine alkaloids coniine and coniceine may be regarded as true alkaloids (rather than pseudoalkaloids: see below) although they do not originate from amino acids. "Protoalkaloids", which contain nitrogen (but not the nitrogen heterocycle) and also originate from amino acids. Examples include mescaline, adrenaline and ephedrine. Polyamine alkaloids – derivatives of putrescine, spermidine, and spermine. Peptide and cyclopeptide alkaloids. Pseudoalkaloids – alkaloid-like compounds that do not originate from amino acids. This group includes terpene-like and steroid-like alkaloids, as well as purine-like alkaloids such as caffeine, theobromine, theacrine and theophylline. Some authors classify ephedrine and cathinone as pseudoalkaloids. Those originate from the amino acid phenylalanine, but acquire their nitrogen atom not from the amino acid but through transamination. Some alkaloids do not have the carbon skeleton characteristic of their group. So, galanthamine and homoaporphines do not contain isoquinoline fragment, but are, in general, attributed to isoquinoline alkaloids. Main classes of monomeric alkaloids are listed in the table below:
Sources: en.wikipedia.org
In Genesis 17:12-13, God also specifies that slaves must be circumcised, but Rabbinic Judaism condemns forced conversion, so gentiles are only required to be circumcised if they show genuine interest in joining the Jewish nation. If an improper circumcision has already been performed, it is required that a drop of blood be drawn as a symbolic circumcision. There are certain exceptions for those with poor health. The Reform and Reconstructionist movements generally do not require a circumcision as part of the conversion process. According to traditional Jewish law, in the absence of an adult free Jewish male expert, a woman, a slave, or a child who has the required skills is also authorized to perform the circumcision, provided that they are Jewish. However, most streams of non-Orthodox Judaism allow female mohels, called mohalot (Hebrew: מוֹהֲלוֹת, the plural of מוֹהֶלֶת mohelet, feminine of mohel), without restriction. In 1984 Deborah Cohen became the first certified Reform mohelet; she was certified by the Berit Mila program of Reform Judaism. All major rabbinical organizations recommend that male infants should be circumcised. The issue of converts remains controversial in Reform and Reconstructionist Judaism. Brit shalom (Hebrew: ברית שלום; "Covenant of Peace"), also called alternative brit to the practice of brit milah, is a naming ceremony for Jews that does not involve circumcision. The first known ceremony is said to have been celebrated around 1970 by Rabbi Sherwin Wine, the founder of the Society for Humanistic Judaism. Although increasingly many U.S.
==== Chlorophylls ==== Chlorophyll a is found in all chloroplasts, as well as their cyanobacterial ancestors. Chlorophyll a is a blue-green pigment partially responsible for giving most cyanobacteria and chloroplasts their color. Other forms of chlorophyll exist, such as the accessory pigments chlorophyll b, chlorophyll c, chlorophyll d, and chlorophyll f. Chlorophyll b is an olive green pigment found only in the chloroplasts of plants, green algae, any secondary chloroplasts obtained through the secondary endosymbiosis of a green alga, and a few cyanobacteria. It is the chlorophylls a and b together that make most plant and green algal chloroplasts green. Chlorophyll c is mainly found in secondary endosymbiotic chloroplasts that originated from a red alga, although it is not found in chloroplasts of red algae themselves. Chlorophyll c is also found in some green algae and cyanobacteria. Chlorophylls d and f are pigments found only in some cyanobacteria.
Riots and protests resumed the following day, 17 December. The rioters broke into the district committee building and threw party documents, propaganda brochures, Ceaușescu's writings, and other symbols of Communist power out of windows. The military was sent in to control the riots, because the situation was beyond the capability of the Securitate and conventional police to handle. The presence of the army in the streets was an ominous sign; it meant that they had received their orders from the highest level of the command chain, presumably from Ceaușescu himself. The army failed to establish order, and chaos ensued, including gunfire, fights, casualties, and burned cars. Transportor Amfibiu Blindat (TAB) armoured personnel carriers and tanks were called in. After 20:00, from Piața Libertății (Liberty Square) to the Opera, there was wild shooting, including the area of Decebal bridge, Calea Lipovei (Lipovei Avenue) and Calea Girocului (Girocului Avenue). Tanks, trucks and TABs blocked the accesses into the city, while helicopters hovered overhead. After midnight, the protests calmed down. Colonel-General Ion Coman, local Party secretary Ilie Matei, and Colonel-General Ștefan Gușă (Chief of the Romanian General Staff) inspected the city. Some areas looked like the aftermath of a war: destruction, rubble and blood.
Sources: en.wikipedia.org
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.
No. It is not an anabolic-androgenic steroid; it is a synthetic PPARδ agonist. Because it is banned in sport, it is sometimes grouped with doping agents even though its chemical class differs from steroids.
Human data are limited and development was discontinued, so major effects and long-term risks are not well characterized. Some early studies examined metabolic markers, but they do not provide a basis for unsupervised use.
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.