This is a working overview of research chemical, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
| 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. |
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.
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.
In January 2026, Thomas Crosbie, an American military expert working at the Royal Danish Defence College, said that any attempt to seize Greenland would constitute a criminal act, and that Denmark, with the backing of its allies, would have the legal right to arrest any Americans involved in such actions and prosecute them under Danish criminal law. Danish troops in Greenland are legally obligated to defend Danish territory under military law. Under a 1952 standing order, Danish troops are ordered to "immediately take up the fight without waiting for, or seeking orders" in "the event of an attack on Danish territory". The Danish government confirmed in January 2026 that the order remains in place and that Danish soldiers would shoot back if Greenland is attacked. The Ministry of Defence said Danish troops would immediately respond to an invasion of Greenland with force and the chairman of the Defence Committee, Rasmus Jarlov, said Denmark would invoke Article 5 if attacked by the US. Jarlov said an American attack would mean war with Denmark and that retaliation would include deadly force. As of January 2026, Article 5 has been invoked only once in NATO history: in response to the September 11 attacks on the US in 2001, when Denmark volunteered "to fight alongside American soldiers in two different conflicts ... [deploying] tens of thousands of troops to Afghanistan and Iraq over two decades ... [suffering] the third-highest per capita casualty rate".
== Nazi Resistance == The BRSD positioned itself squarely against National Socialism. It referred to Nazism as "pre-Christian, heathen destructive power' and criticized the ideological glorification of violence by the Nazis. As with other socialist organizations, the Federation was banned once the Nazis seized power, however, various members of the organization formed resistance groups, such as Erich Kürschner in Berlin.
Like CMX-1152, the herbal mixture known as Protandim that supplanted it was marketed by Lifeline as an "anti-aging" supplement that increases the body's antioxidant defenses by upregulating superoxide dismutase, catalase, and glutathione peroxidase. According to the company, the product was initially sold through retail channels such as GNC; however, in 2009, after several consecutive years of multimillion-dollar losses, the company, which by then was doing business under the name LifeVantage, stopped marketing it through retailers and switched to multi-level marketing, selling it instead through a network of commissioned independent distributors. According to LifeVantage, the move from retail to multi-level marketing was prompted by the January 2008 hiring of David W. Brown, (formerly CEO and president of Metabolife) as the company's CEO and president. Beginning in 2005, Protandim was produced under a manufacturing agreement with The Chemins Company of Colorado Springs, Colorado. In July 2008, LifeVantage entered into a new manufacturing agreement with Cornerstone Research & Development to produce Protandim, and with Wasatch Product Development to produce a Protandim-based skin cream (TrueScience). In 2006, biochemist Joe M. McCord joined the LifeVantage board of directors as the company's director of science. McCord, who is listed by the U.S. Securities and Exchange Commission as a LifeVantage insider shareholder, served as a spokesperson for Protandim and was responsible for distributor training and product research.
The gold in the county council's coat of arms symbolises the wealth of the area. Black is for both mining and the Black Mountains. The fountain is a medieval heraldic charge displayed as a roundel barry wavy argent and azure. It represents water and refers to both the water catchment area and the rivers and lakes. Thus, the arms contain references to the hills and mountains, rivers and lakes, water supply and industry. The crest continues the colouring of the arms. A tower has been used in preference to a mural crown, which alludes to the county's military history and remains. From the tower rises a red kite, a bird almost extinct elsewhere in Britain but thriving in Powys. The bird is a "semé of black lozenges" for the former coal mining industry, while the golden fleece it carries is a reference to the importance of sheep rearing in the county. The county motto is: Powys – the paradise of Wales (Welsh: Powys Paradwys Cymru).
Sources: en.wikipedia.org
== History and etymology == In 1840-1841, Carl Julius Fritzsche was able to extract and crystallize two acids from the products of reaction of indigo dye with caustic potash, which he called chrysanilic and anthranilic acids after their colors before purification (golden yellow and black respectively) and the plant anil (Indigofera suffruticosa). The former was identified as ortho-carboxy anil of indoxyl-2-aldehyde only in 1910 while the latter was identified as salicylamide already in 1843 by Cahours.
Cocaine Anonymous (CA) is a twelve-step program formed in 18 November 1982 for people who seek recovery from drug addiction. It is patterned very closely after Alcoholics Anonymous (AA), although the two groups are unaffiliated. While many CA members have been addicted to cocaine, crack, speed or similar substances, CA accepts all who desire freedom from "cocaine and all other mind-altering substances" as members. Numerous medications have been investigated for use in cocaine dependence, but as of 2015, none of them were considered to be effective. Drugs which help to re-stabilize the glutamate system such as N-acetylcysteine have been proposed for the treatment of addiction to cocaine, nicotine, and alcohol. However, none have sufficient evidence or regulatory approval for routine clinical use, so psychosocial interventions remain the mainstay of treatment.
The study of chemical kinetics is used to determine the rate law for a reaction. The rate law provides a quantitative relationship between the rate of a chemical reaction and the concentrations or pressures of the chemical species present. Rate laws must be determined by experimental measurement and generally cannot be elucidated from the chemical equation. The experimentally determined rate law refers to the stoichiometry of the transition state structure relative to the ground state structure. Determination of the rate law was historically accomplished by monitoring the concentration of a reactant during a reaction through gravimetric analysis, but today it is almost exclusively done through fast and unambiguous spectroscopic techniques. In most cases, the determination of rate equations is simplified by adding a large excess ("flooding") all but one of the reactants.
=== Pharmacodynamics === Based on its structural similarity to caffeine and theacrine, methylliberine is widely believed to be an adenosine receptor antagonist, although as of 2023 no scientific studies have been done to confirm this action. There is no evidence that methylliberine augments dopamine receptors in a way that is distinct from caffeine, contrary to claims made by the manufacturer.
=== Unmelted sample analysis === Methods to analyze the microbe populations of colder, unmelted ice samples (cold enough to prevent brine drainage) under microscopes were developed by designing specialized equipment. Epifluorescence microscopes that can operate at subzero temperatures allowed researchers to observe undisturbed brine pool microbe populations with the addition of DAPI (DNA staining 4', 6-diamidino-2-phenylindole) mixed into an adequately salty and cold brine solution to highlight non-autofluorescing microbes. Alternatively, a microscope with a cold stage, commonly used to study glacial ice, may also be used to study unmelted sea ice with the right modifications. Other stains such as Alcian Blue (stains extracellular polysaccharide substances) and CTC (stains oxygen-respiring bacteria, 5-cyano-2,3-ditolyl tetrazolium) have also been used. Alcian Blue stains have revealed that extracellular polymeric substances (EPS) are ubiquitous throughout brine pools found in sea ice, even without any microbes visible in the brine pool. Some EPS originates from seawater before freezing but is also produced in copious amounts within algal bands and by bacteria to a lesser extent but throughout the entirety of the sea ice. CTC stains have indicated greater percentages of microbial activity within the sea ice when compared to the seawater below it, especially bacteria associated with particulate matter.
Sources: en.wikipedia.org
While some of the neutrons released from the fission of 238U are fast enough to induce another fission in 238U, most are not, meaning it can never achieve criticality. While there is a very small (albeit nonzero) chance of a thermal neutron inducing fission in 238U, neutron absorption is orders of magnitude more likely.
Etoxeridine (Carbetidine, Atenos) is a 4-phenylpiperidine derivative that is related to the clinically used opioid analgesic drug pethidine (meperidine). Etoxeridine was developed in the 1950s and investigated for use in surgical anesthesia, however it was never commercialized and is not currently used in medicine. As with other opioids which were not in clinical use during the drafting of the Controlled Substances Act, it is categorized as a Schedule I narcotic.
A helix has an overall dipole moment due to the aggregate effect of the individual microdipoles from the carbonyl groups of the peptide bond pointing along the helix axis. The effects of this macrodipole are a matter of some controversy. α-helices often occur with the N-terminal end bound by a negatively charged group, sometimes an amino acid side chain such as glutamate or aspartate, or sometimes a phosphate ion. Some regard the helix macrodipole as interacting electrostatically with such groups. Others feel that this is misleading and it is more realistic to say that the hydrogen bond potential of the free NH groups at the N-terminus of an α-helix can be satisfied by hydrogen bonding; this can also be regarded as set of interactions between local microdipoles such as C=O···H−N.
Gas phase ion chemistry is a field of science encompassed within both chemistry and physics. It is the science that studies ions and molecules in the gas phase, most often enabled by some form of mass spectrometry. By far the most important applications for this science is in studying the thermodynamics and kinetics of reactions. For example, one application is in studying the thermodynamics of the solvation of ions. Ions with small solvation spheres of 1, 2, 3... solvent molecules can be studied in the gas phase and then extrapolated to bulk solution. Transition state theory is the theory of the rates of elementary reactions which assumes a special type of chemical equilibrium (quasi-equilibrium) between reactants and activated complexes. RRKM theory is used to compute simple estimates of the unimolecular ion decomposition reaction rates from a few characteristics of the potential energy surface.
7-Chlorokynurenic acid (7-CKA) is a tool compound that acts as a potent and selective competitive antagonist of the glycine site of the NMDA receptor. It produces ketamine-like rapid antidepressant effects in animal models of depression. However, 7-CKA is unable to cross the blood-brain-barrier, and for this reason, is unsuitable for clinical use. As a result, a centrally-penetrant prodrug of 7-CKA, 4-chlorokynurenine (AV-101), has been developed for use in humans, and is being studied in clinical trials as a potential treatment for major depressive disorder, and anti-nociception. In addition to antagonizing the NMDA receptor, 7-CKA also acts as a potent inhibitor of the reuptake of glutamate into synaptic vesicles (or as a vesicular glutamate reuptake inhibitor), an action that it mediates via competitive blockade of vesicular glutamate transporters (Ki = 0.59 mM). 5,7-Dichlorokynurenic acid Evans blue Kynurenic acid Xanthurenic acid
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.
No. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.