Everything below concerns WADA Prohibited List. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-09-11. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
The compound is typically described as a laboratory compound rather than a therapeutic product. Published reports have explored its role in lipid disorders, insulin sensitivity, and exercise metabolism, yet no major drug regulator has approved it for medical use. Commercial samples sold under the cardarine name may vary in purity and identity. Analytical confirmation is therefore necessary when the material is discussed in scientific or regulatory contexts. Its classification as a prohibited substance in sport further shapes how it is studied and reported.
Cardarine is a common name for GW501516, a synthetic compound studied for its effects on lipid and glucose metabolism. It functions as an agonist at peroxisome proliferator-activated receptor delta, or PPARδ, a nuclear receptor that influences gene expression. The molecule is not a steroid, nor is it a selective androgen receptor modulator. It is also known in research and sports literature as GW-501516 and endurobol. Early laboratory work examined its metabolic activity in cell cultures and animal models.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
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.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
Because of the activity of manufactured 60Co sources, their radioactivity can present a severe hazard to humans, and can cause death (potentially in less than an hour from acute exposure). After entering a living mammal (such as a human), assuming that the subject does not die shortly after exposure (as may happen in acute exposure incidents), some of the 60Co is excreted in feces. The rest is taken up by tissues, mainly the liver, kidneys, and bones, where the prolonged exposure to gamma radiation can cause cancer. Over time, the absorbed cobalt is eliminated in urine.
== Mechanism of action == Dulaglutide binds to glucagon-like peptide 1 receptors, slowing gastric emptying and increasing insulin secretion by pancreatic Beta cells. Simultaneously the compound reduces the elevated glucagon secretion by inhibiting alpha cells of the pancreas, as glucagon is known to be inappropriately elevated in diabetic patients. GLP-1 is normally secreted by L cells of the gastrointestinal mucosa in response to a meal.
The major part of the PAP is the nèiwèi bùduì (Chinese: 内卫部队); translations include "internal security forces", "internal security troops", and "internal guards corps". Internal security forces are divided into provincial-level formations with geographical areas of responsibility. They are subordinated to PAP headquarters; the 2017-2018 reforms removed control of PAP units from local government. Internal security forces are focused on domestic security missions, maintaining stability in western China, guarding government compounds, disaster relief, and responding to major anti-government unrest. The zǒngduì (Chinese: 总队) is the provincial formation. They are called "corps" by the PAP; Western analysts have used "contingent", "general corps", and "detachment". Most are corps deputy leader grade formations. The exceptions are the Beijing and Xinjiang corps which are corps leader grade; their subordinate entities, except for the logistics and equipment bureaus, are one grade higher than in the other corps. Hong Kong and Macau do not have corps. Corps have mobile detachments and duty detachments (Chinese: 执勤支队; pinyin: zhíqín zhīduì). Duty detachments protect government compounds and perform routine duties; they may exist because the CCP lacks confidence in the ability of local public security forces to handle "mass incidents". Mobile detachments (Chinese: 机动支队; pinyin: jīdòng zhīduì) are rapid reaction units roughly corresponding to PLAGF regiments. Some were existing corps mobile units before the reforms. Most were transferred from the disbanded mobile divisions.
Despite the underlying notion of the lab as a confined space for experts, the term "laboratory" is also increasingly applied to workshop spaces such as Living Labs, Fab Labs, or Hackerspaces, in which people meet to work on societal problems or make prototypes, working collaboratively or sharing resources. This development is inspired by new, participatory approaches to science and innovation and relies on user-centred design methods and concepts like Open innovation or User innovation. One distinctive feature of work in Open Labs is the phenomenon of translation, driven by the different backgrounds and levels of expertise of the people involved.
Starting with the work of Carl Woese from 1977, genomics studies have placed the last universal common ancestor (LUCA) of all modern life-forms between Bacteria and a clade formed by Archaea and Eukaryota in the phylogenetic tree of life. It lived over 4.2 Gya. A minority of studies have placed the LUCA in Bacteria, proposing that Archaea and Eukaryota are evolutionarily derived from within Eubacteria; Thomas Cavalier-Smith suggested in 2006 that the phenotypically diverse bacterial phylum Chloroflexota contained the LUCA.
Sources: en.wikipedia.org
Involvement of lipid peroxidation chain reaction in atherogenesis triggered research on the protective role of the heavy isotope (deuterated) polyunsaturated fatty acids (D-PUFAs) that are less prone to oxidation than ordinary PUFAs (H-PUFAs). PUFAs are essential nutrients – they are involved in metabolism in that very form as they are consumed with food. In transgenic mice, a model for human-like lipoprotein metabolism, adding D-PUFAs to the diet reduced body weight gain, improved cholesterol handling, and reduced atherosclerotic damage to the aorta.
== Importance == Many urine tests (urinalysis) monitor the amount of urobilin in urine, as its levels can give insight on the effectiveness of urinary tract function. Normally, urine would appear as either light yellow or colorless. A lack of water intake, for example following sleep or dehydration, reduces the water content of urine, thereby concentrating urobilin and producing a darker color of urine. Obstructive jaundice reduces biliary bilirubin excretion, which is then excreted directly from the blood stream into the urine, giving a dark-colored urine but with a paradoxically low urobilin concentration, no urobilinogen, and usually with correspondingly pale faeces. Darker urine can also be due to other chemicals, such as various ingested dietary components or drugs, porphyrins in patients with porphyria, and homogentisate in patients with alkaptonuria.
==== 4.C Acyl CoA ligase-coupled transporters ==== 4.C.1 The Proposed Fatty Acid Transporter (FAT) Family 4.C.2 The Carnitine O-Acyl Transferase (CrAT) Family 4.C.3 The Acyl-CoA Thioesterase (AcoT) Family
On 23 July 1952, a law combined the GDR's municipal districts (Kreise) into 14 regional districts (Bezirke), and subsequently, on 25 July 1952, the state governments transferred their administrative tasks to the new regional districts. With this law, the Länder were in effect dissolved, and the GDR had become a highly centralized state. While they formally remained in existence, they no longer had any political or administrative functions. The Bezirke were drawn without regard to the borders of the Länder and each named after their capitals, from north to south: Rostock, Neubrandenburg, Schwerin, Potsdam, Frankfurt (Oder), Magdeburg, Cottbus, Halle, Leipzig, Erfurt, Dresden, Karl-Marx-Stadt (named Chemnitz until 1953), Gera and Suhl. The Länderkammer also remained in existence and its members were elected in 1954 by combined sessions of the Bezirkstage (district assemblies) in each Land and in 1958 directly by the Bezirkstage. However, on 8 December 1958, the Länderkammer formally dissolved itself with no objections being raised. The Länder continued to exist de jure up until the entry into force of the 1968 Constitution, which formalized their abolition. Due to its special status, East Berlin was originally not counted as a Bezirk. In 1961, after the construction of the Berlin Wall, East Berlin came to be recognised in GDR administration as a 15th district, though it retained a special status until the adoption of the 1968 Constitution formally designated it as Bezirk Berlin.
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.