This is a working overview of regulatory status, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-06-17. Anything still debated is marked as such rather than presented as settled.
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 a common name for GW501516, a synthetic compound first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
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.
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.
| Property | Value | Notes |
|---|---|---|
| IUPAC name | {4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid | Systematic name for GW501516 |
| CAS Registry Number | 317318-70-0 | Unique identifier for the parent compound |
| Molecular formula | C21H18F3NO3S2 | Includes carbon, hydrogen, fluorine, nitrogen, oxygen, and sulfur |
| Molecular weight | 453.5 g/mol | Approximate value for the neutral form |
| Appearance | White to off-white powder | Typical description for purified laboratory material |
==== United Arab Emirates ==== Franchise partner Alshaya Group opened its first Chipotle restaurant in the United Arab Emirates in Dubai at the Jumeirah Beach Residence in September 2024. Alshaya opened its first location in Abu Dhabi at the Yas Mall, the third in the UAE, in August 2025.
Mayer's reagent is an alkaloidal precipitating reagent used for the detection of alkaloids in natural products. Mayer's reagent is freshly prepared by dissolving a mixture of mercuric chloride (1.36 g) and of potassium iodide (5.00 g) in water (100.0 ml). Most alkaloids are precipitated from neutral or slightly acidic solution by Mayer's reagent (potassiomercuric iodide solution) to give a cream coloured precipitate. This test was invented by and named after the German chemist Julius Robert Von Mayer (1814–1878). Can be used as a visualization reagent in thin-layer chromatography (TLC) for the detection of alkaloids.
Litvinenko in 2006, and was suspected as a possible cause of Yasser Arafat's death, following exhumation and analysis of his corpse in 2012–2013. The radioisotope may also have been used to kill Yuri Shchekochikhin, Lecha Islamov and Roman Tsepov.
Peters has played audio of the racial slur nigger. He has also been known to wear a hat bearing the word and Bernstein described his use of it as "chronic". Helen Rummel of The Arizona Republic wrote that he was "well-known" for "the use of racist slurs in his livestreams". Peters said on a livestream that "It's not a racist thing. It's just a fun word to say." The Atlantic's Charlie Warzel wrote that he "revel[s] in anti-Semitism". Peters stated, "I'm more of, like, a moggist, not a racist." In February 2026, a tweet describing Peters as having been "brutally frame mogged" by an Arizona State University fraternity leader in a video became a copypasta and meme. The term jestermaxxing, used to describe having fun, also spread online that month due to its use in video captions of Peters dancing at the club. The suffixes -mogging and -maxxing and the incel term foid, a shortening of the portmanteau femoid, which describes women as subhuman, found popular usage online by February 2026 due to these and other memes of Peters. They were typically posted by "clippers", social media users who repost clips from livestreams with eye-catching captions and, according to Katie Notopoulos of Business Insider, often "have a financial motive" to be paid by creator programs or influencers. Bernstein also noted that some Kick users were paid by the platform for clipping Peters's livestreams.
==== DXP-dependent biosynthesis ==== The DXP-dependent biosynthetic route requires several steps and a convergence of two branches, one producing 3-hydroxy-1-aminoacetone phosphate from erythrose 4-phosphate, while the other (single enzyme) producing deoxyxylulose 5-phosphate (DXP) from glyceraldehyde 3-phosphate (GAP) and pyruvate. The condensation product of 3-hydroxy-1-aminoacetone phosphate and deoxyxylulose 5-phosphate is pyridoxine 5'-phosphate. The condensation is catalyzed by PNP synthase, encoded by pdxJ, which creates PNP (pyridoxine 5' phosphate). The final enzyme is PNP oxidase (pdxH), which catalyzes the oxidation of the 4' hydroxyl group to an aldehyde using dioxigen, resulting in hydrogen peroxide. The first branch is catalyzed in E. coli by enzymes encoded by epd, pdxB, serC and pdxA. These share mechanistical similarities and homology with the three enzymes in serine biosynthesis (serA (homologue of pdxB), serC, serB — however, epd is a homologue of gap), which points towards a shared evolutionary origin of the two pathways. In several species there are two homologues of the E. coli serC gene, generally one in a ser operon (serC), and the other in a pdx operon, in which case it is called pdxF.
Sources: en.wikipedia.org
== Factors affecting elasticity == In a given isotropic solid, with known theoretical elasticity for the bulk material in terms of Young's modulus, the effective elasticity will be governed by porosity. Generally a more porous material will exhibit lower stiffness. More specifically, the fraction of pores, their distribution at different sizes and the nature of the fluid with which they are filled give rise to different elastic behaviours in solids. For isotropic materials containing cracks, the presence of fractures affects the Young and the shear moduli perpendicular to the planes of the cracks, which decrease (Young's modulus faster than the shear modulus) as the fracture density increases, indicating that the presence of cracks makes bodies brittler. Microscopically, the stress–strain relationship of materials is in general governed by the Helmholtz free energy, a thermodynamic quantity. Molecules settle in the configuration which minimizes the free energy, subject to constraints derived from their structure, and, depending on whether the energy or the entropy term dominates the free energy, materials can broadly be classified as energy-elastic and entropy-elastic. As such, microscopic factors affecting the free energy, such as the equilibrium distance between molecules, can affect the elasticity of materials: for instance, in inorganic materials, as the equilibrium distance between molecules at 0 K increases, the bulk modulus decreases. The effect of temperature on elasticity is difficult to isolate, because there are numerous factors affecting it.
=== Cognitive function === GH has also been studied in the context of cognitive function, including learning and memory. GH in humans appears to improve cognitive function and may be useful in the treatment of patients with cognitive impairment that is a result of GH deficiency.
Statistics from 1998 show that there were wide racial disparities in arrests, prosecutions, sentencing and deaths. African-American drug users made up for 35% of drug arrests, 55% of convictions, and 74% of people sent to prison for drug possession crimes. Nationwide African-Americans were sent to state prisons for drug offenses 13 times more often than other races, even though they supposedly constituted only 13% of regular drug users. Human Rights Watch's report, "Race and the Drug War" (2000), provided extensive documentation of racial disparities, citing statistics and case studies highlighting the unequal treatment of racial and ethnic groups by law enforcement agencies, particularly in drug arrests. According to the report, in the US in 1999, compared to non-minorities, African Americans were far more likely to be arrested for drug crimes, and received much stiffer penalties and sentences. Reporting on the effects of state initiatives, the Department of Justice found that, from 1990 through 2000, "the increasing number of drug offenses accounted for 27% of the total growth among black inmates, 7% of the total growth among Hispanic inmates, and 15% of the growth among white inmates." In Malign Neglect – Race Crime and Punishment in America (1995), criminologist Michael Tonry wrote, "The War on Drugs foreseeably and unnecessarily blighted the lives of hundreds and thousands of young disadvantaged black Americans and undermined decades of effort to improve the life chances of members of the urban black underclass."
End groups are an important aspect of polymer synthesis and characterization. In polymer chemistry, they are functional groups that are at the very ends of a macromolecule or oligomer (IUPAC). In polymer synthesis, like condensation polymerization and free-radical types of polymerization, end-groups are commonly used and can be analyzed by nuclear magnetic resonance (NMR) to determine the average length of the polymer. Other methods for characterization of polymers where end-groups are used are mass spectrometry and vibrational spectrometry, like infrared and raman spectroscopy. These groups are important for the analysis of polymers and for grafting to and from a polymer chain to create a new copolymer. One example of an end group is in the polymer poly(ethylene glycol) diacrylate where the end-groups are circled.
Sources: en.wikipedia.org
=== Flavour === A portion of the distinct flavour comes from lipolysis (breakdown of fat). The metabolism of the blue mold further breaks down fatty acids to form ketones to give blue cheese a richer flavour and aroma.
===== MeSH D08.811.464.938 – ubiquitin-protein ligase complexes ===== MeSH D08.811.464.938.249 – Ubiquitin-activating enzyme MeSH D08.811.464.938.500 – ubiquitin-conjugating enzymes MeSH D08.811.464.938.750 – ubiquitin-protein ligases MeSH D08.811.464.938.750.186 – fanconi anemia complementation group l protein MeSH D08.811.464.938.750.374 – proto-oncogene proteins c-cbl MeSH D08.811.464.938.750.562 – proto-oncogene proteins c-mdm2 MeSH D08.811.464.938.750.750 – skp cullin f-box protein ligases MeSH D08.811.464.938.750.750.500 – cullin proteins MeSH D08.811.464.938.750.875 – von hippel-lindau tumor suppressor protein
About six months after the United States invasion of Iraq of 2003, rumors of Iraq prison abuse scandals started to emerge. Many of the abuse incidents that emerged occurred at Abu Ghraib prison. Graphic pictures of some of those abuse incidents were made public. Less well-known abuse incidents have been documented at American prisons throughout Iraq.
== Use in research == Ibotenic acid used for the lesioning of rat's brains is kept frozen in a phosphate-buffered Saline Solution at a pH of 7.4, and can be kept for up to a year with no loss in toxicity. Injection of .05-.1 microliters of Ibotenic acid into the hippocampus at a rate of .1 microliter/min resulted in semi-selective lesioning. Hippocampal lesioning led to a considerable loss of cells in pyramidal cells (CA1-CA3) as well as granule cells in the dentate gyrus. Ibotenic acid lesioning also causes some damage to axons along the perforant pathway. Typically, when lesioning is done with other chemicals the subject cannot relearn a task. However, due to Ibotenic acid's reactivity with glutamate receptors such as the NMDA receptor, Ibotenic acid lesioning does allow the subject to relearn tasks. Ibotenic acid lesioning is thus preferred in studies where re-learning a task after lesioning is essential. Compared to other lesioning agents, Ibotenic acid is one of the most site-specific; however, less-damaging alternatives are presently sought.
=== Setting === According to the game's introductory cutscene, the Gunmen act as a sort of military police force for humanity's inter-galactically expanding colonial empire at an unknown time period in the distant future. During a mission five years prior to the beginning of the game, the Gunmen were dispatched to a planet called Banzure Prime to investigate a communications breakdown with a research colony there, under the command of their leader, known simply as "The General". While investigating the colony, they come under attack by massive, worm-like organisms that form one part of a larger genus of creatures known as "Xenomes". The General, seeing his men have no chance by themselves, takes command of one of the Gunmen's dropships and begins performing bombing runs on the attacking Xenomes, destroying several before being captured in the jaws of one of the larger creatures. Meanwhile, the player character, Major Archer, rallies the remaining gunmen and orders them to retreat to the remaining ships and get off-world immediately, assuming that the general is already dead. The General, still alive as his fighter is dragged underground, pleads (apparently unheard) for rescue over the radio, but the Gunmen leave before having a chance to receive the message.
Sources: en.wikipedia.org
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.
It is prohibited by the World Anti-Doping Agency as a hormone and metabolic modulator. Athletes who test positive for GW501516 can face sanctions, including suspensions and loss of results.
Cardarine is a common or trade-style name, while GW501516 is the research code for the same chemical entity. Some sources also use Endurobol or GSK-516. The names refer to the same compound, not distinct drugs.
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.