A practical reference on PPARδ agonist: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-02-06. Anything still debated is marked as such rather than presented as settled.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
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.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516; GW-1516; endurobol | GW501516 is the research code |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator |
| Molecular formula | C21H18F3NO3S2 | Established chemical formula |
| Molar mass | 453.5 g/mol | Calculated from the formula |
| Regulatory status | Prohibited in sport; not approved as medicine | Status varies by country |
In the fitness and bodybuilding literature, cardarine is frequently discussed as an endurance agent or fat-loss compound, although such claims are not supported by robust clinical evidence. Online descriptions often mix animal data, user anecdotes, and marketing language. Researchers who study PPARδ agonists distinguish between receptor activation in controlled experiments and unsupervised use of unverified products. The latter introduces unknown purity, dose, and interactions, making reported experiences difficult to interpret scientifically.
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.
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.
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.
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.
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.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
== Manufacture == BCG is prepared from a strain of the attenuated (virulence-reduced) live bovine tuberculosis bacillus, Mycobacterium bovis, that has lost its ability to cause disease in humans. It is specially subcultured in a culture medium, usually Middlebrook 7H9. Because the living bacilli evolve to make the best use of available nutrients, they become less well-adapted to human blood and can no longer induce disease when introduced into a human host. Still, they are similar enough to their wild ancestors to provide some immunity against human tuberculosis. The BCG vaccine can be anywhere from 0 to 80% effective in preventing tuberculosis for 15 years; however, its protective effect appears to vary according to geography and the lab in which the vaccine strain was grown. Several companies make BCG, sometimes using different genetic strains of the bacterium. This may result in different product characteristics. OncoTICE, used for bladder instillation for bladder cancer, was developed by Organon Laboratories (since acquired by Schering-Plough, and in turn acquired by Merck & Co.). A similar application is the product of Onko BCG of the Polish company Biomed-Lublin, which owns the Brazilian substrain M. bovis BCG Moreau which is less reactogenic than vaccines including other BCG strains. Pacis BCG, made from the Montréal (Institut Armand-Frappier) strain, was first marketed by Urocor in about 2002. Urocor was since acquired by Dianon Systems. Evans Vaccines (a subsidiary of PowderJect Pharmaceuticals).
Gamow was not entirely wrong. Although his concept about the direct synthesis of amino acid from the DNA double strands was proven false, his prediction on the nature of amino acids and how they were coded by the DNA sequences (triplet nucleotides) were confirmed the key components of protein synthesis. This broad concept is now known as the genetic code. It was Crick, along with J.S. Griffith and Leslie Orgel (member of the RNA Tie Club), describing the 20-amino acid prediction as the "magic number," introduced the proper concept in 1957:[The] order of the amino acids is determined by the order of the nucleotides of the nucleic acid. There are some twenty naturally occurring amino acids commonly found in proteins, but (usually) only four different nucleotides. The problem of how a sequence of four things (nucleotides) can determine a sequence of twenty things (amino acids) is known as the 'coding' problem.As Crick was lecturing on his hypothesis, such adaptors do exist in nature was already discovered by the team of Mahlon Hoagland and Paul Zamecnik, whose paper was published the following year in March 1958. These "soluble RNAs" are now called transfer RNAs and mediate the translation of messenger RNAs on ribosomes according to the rules contained in the genetic code. Crick imagined that his adaptors would be small, perhaps 5-10 nucleotides long. In fact, they are much larger, having a more complex role to play in protein synthesis, and are closer to 100 nucleotides in length.
The crew landed on the reciprocal runway with no further incident. No casualties. On September 21, 2001, RA-86074 (c/n 041) operating as Aeroflot Flight 521 belly-landed at Dubai after a flight from Moscow, the flight crew having switched off the ground proximity warning due to heavy workload on the approach and then neglected to extend the landing gear; no casualties; aircraft written off. On July 28, 2002, Pulkovo Aviation Enterprise Flight 9560 RA-86060 (c/n 027) crashed shortly after departure from Moscow on a repositioning flight to Saint Peterburg. The trim toggle button on the control column caused a spontaneous retrimming of the tailplane, rapid transition to nose-heavy trim and a dive. The four flightdeck crew, two ground support staff and ten cabin crew aboard the aircraft died, making the crash the deadliest aviation accident involving the Il-86. The two injured survivors were cabin crew members. Following the Moscow crash in July 2002, the MAK Interstate Aviation Committee withdrew the Il-86's certificate of airworthiness, temporarily grounding the type. The certificate was rapidly restored in stages by early 2003. The accident prompted the Egyptian civil aviation authorities to attempt to ban Il-86 operations to Egypt. Amid continuing negotiations, by 2007 the intention had lapsed, with intensive Il-86 operations to and from Egypt continuing.
== Homogenization == Tissue is typically homogenized in a buffer solution that is isotonic to stop osmotic damage. Mechanisms for homogenization include grinding, mincing, chopping, pressure changes, osmotic shock, freeze-thawing, and ultrasound. The samples are then kept cold to prevent enzymatic damage. It is the formation of homogenous mass of cells (cell homogenate or cell suspension). It involves grinding of cells in a suitable medium in the presence of certain enzymes with correct pH, ionic composition, and temperature. For example, pectinase which digests middle lamella among plant cells.
Romanian cuisine has been influenced by Austrian and German cuisine (especially in the historical regions that had been formerly administered by the Habsburg monarchy), but also shares some similarities with other cuisines in the Balkan region such as Greek, Bulgarian, and Serbian cuisine. Ciorbă includes a wide range of sour soups, while mititei, mămăligă (similar to polenta), and sarmale are featured commonly in main courses. Pork, chicken, and beef are the preferred types of meat, but lamb and fish are also quite popular. Certain traditional recipes are made in direct connection with the holidays: chiftele, tobă and tochitură at Christmas; drob, pască and cozonac at Easter and other Romanian holidays. Țuică is a strong plum brandy reaching a 70% alcohol content which is the country's traditional alcoholic beverage, taking as much as 75% of the national crop (Romania is one of the largest plum producers in the world). Traditional alcoholic beverages also include wine, rachiu, palincă and vișinată, but beer consumption has increased dramatically over recent years. In 2019, Romania became the country with the highest alcohol consumption per capita.
Sources: en.wikipedia.org
In the late 19th century Thailand, there was a high demand for professional talent by the central government. In 1899, the King founded the School for Training of Civil Officials near the northern gate of the royal palace. Graduates from the school became royal pages, a traditional entrance into the Mahattai Ministry or other government ministries. As of 2019, Thailand has nineteen public universities.
== Non-enzymatic cofactors == The term is used in other areas of biology to refer more broadly to non-protein (or even protein) molecules that either activate, inhibit, or are required for the protein to function. For example, ligands such as hormones that bind to and activate receptor proteins are termed cofactors or coactivators, whereas molecules that inhibit receptor proteins are termed corepressors. One such example is the G protein-coupled receptor family of receptors, which are frequently found in sensory neurons. Ligand binding to the receptors activates the G protein, which then activates an enzyme to activate the effector. In order to avoid confusion, it has been suggested that such proteins that have ligand-binding mediated activation or repression be referred to as coregulators.
== Computational neuroscience == Metastability in the brain is a phenomenon studied in computational neuroscience to elucidate how the human brain recognizes patterns. Here, the term metastability is used rather loosely. There is no lower-energy state, but there are semi-transient signals in the brain that persist for a while and are different than the usual equilibrium state.
For laboratory quantities, up to 40 are possible. To prepare larger peptides, individual fragments are first produced and purified, and then combined to the final molecule by liquid phase synthesis. Thus, for the production of Roche's anti-AIDS drug Fuzeon (enfuvirtide), three fragments of 10–12 amino acids are first made by solid-phase synthesis and then linked together by liquid-phase synthesis. The preparation of the whole 35 amino acid peptide requires more than 130 individual steps. Microreactor Technology (MRT), used for process intensification, is a relatively new tool that is being developed at several universities, as well as fine chemical companies, such as Bayer Technology Services, Germany; Clariant, Switzerland; Evonik-Degussa, Germany; DSM, The Netherlands; Lonza, Switzerland; PCAS, France; and Sigma-Aldrich, US. The lattermost company produces about 50 fine chemicals up to multi-kilogram quantities in microreactors. From a technological point of view, MRT, or continuous flow reactors, represents the first breakthrough development in reactor design since the introduction of the stirred-tank reactor, which was used by Perkin & Sons when they established a factory on the banks of what was then the Grand Junction Canal in London in 1857, in order to produce mauveïne, the first-ever synthetic purple dye. For a comprehensive coverage of the subject see Micro Process Engineering. Reactions that have worked in microreactors include aromatics oxidations, diazomethane conversions, Grignards, halogenations, hydrogenations, nitrations, and Suzuki couplings.
It was not discovered to act as a very weak (3.5 orders of magnitude less potent) gabapentinoid until 2015. Baclofen marketed under the brandname of Lioresal was introduced in the United States in 1977 for the treatment of spasticity is chemically similar to phenibut but is usually not considered a gabapentinoid. Mirogabalin, under the brand name Tarlige, was approved for the treatment of neuropathic pain and postherpetic neuralgia in Japan in January 2019. Gabapentenoid consumption appears to be increasing; between 2008 and 2018, gabapentenoid use increased by over 17% averaged worldwide, led by growing consumption in the US, Canada, and northern Europe.
Sources: en.wikipedia.org
Beverages (B) Freeze dried drink mixes (coffee or tea) or flavored drinks (lemonade or orange drink) are provided in vacuum-sealed beverage pouches. Coffee and tea may have powdered cream and/or sugar added depending on personal taste preferences. Empty beverage retort pouches are provided for drinking water.
Sulfuric acid is a very important commodity chemical, and a nation's sulfuric acid production was as recently as 2002 believed to be a good indicator of its industrial strength. World production in the year 2004 was about 180 million tonnes, with the following geographic distribution: Asia 35%, North America (including Mexico) 24%, Africa 11%, Western Europe 10%, Eastern Europe and Russia 10%, Australia and Oceania 7%, South America 7%. World production in 2022 was estimated at 260 million tonnes. As of the late 20th century, most of the produced amount (≈60%) was consumed for fertilizers, particularly Superphosphates, ammonium phosphate and Ammonium sulfates. About 20% is used in chemical industry for production of detergents, synthetic resins, dyestuffs, pharmaceuticals, petroleum catalysts, insecticides and antifreeze, as well as in various processes such as oil well acidicizing, aluminium reduction, paper sizing, and water treatment. About 6% of uses are related to pigments and include paints, enamels, printing inks, coated fabrics and paper, while the rest is dispersed into a multitude of applications such as production of explosives, cellophane, acetate and viscose textiles, lubricants, non-ferrous metals, and batteries. Sulfuric acid is used as a consumable for the extraction of copper from oxides in leaching piles. Chile, the world's leading producer of copper, required sulfuric acid in about 20% of its copper production as of 2026.
For the first time the SADF began losing aircraft in numbers, indicating the contested extent of the Angolan skies. The SADF's declining air supremacy forced a number of operational changes. South African pilots exercised a standoff bombing capacity of twenty kilometres and timed their raids so they were out of range before FAPLA MiGs could be scrambled to intercept them. The necessity of avoiding prolonged aerial contact was partly dictated by fuel considerations: the SADF Mirage F1AZ and F1CZ fighters launched from distant bases in South West Africa, which meant they had barely enough fuel for three minutes of combat once they reached Cuito Cuanavale. The impact on ground operations was more consequential. FAPLA MiGs flew reconnaissance missions in search of the G5 and G6 howitzers, forcing the South African artillery crews to resort to increasingly elaborate camouflage and take the precaution of carrying out their bombardments after dark. Owing to the increase in losses and damage due to UNITA's US-supplied Stinger missiles, however, MiG pilots had to adopt contingencies of their own to reduce the vulnerability of their aircraft. Cuban and Angolan warplanes were forced to drop bombs from higher altitudes, greatly reducing their accuracy. FAPLA airfields were also monitored by South African forward artillery observers, who called in bombardments to destroy aircraft while they were exposed on the runway and preparing to take off.
pachynema Also pachytene stage. In meiosis, the third of five substages of prophase I, following zygonema and preceding diplonema. During pachynema, the synaptonemal complex facilitates crossing over between the synapsed homologous chromosomes, and the centrosomes begin to move apart from each other.
87 Tobias Kamke, his semifinal opponent No. 56 Andrey Golubev, and his final opponent No. 89 Paul-Henri Mathieu. At the age of 17 years and 2 months, he became the youngest player to win a Challenger title since Bernard Tomic in 2009 and the twelfth youngest in history. Zverev followed up this title with a breakthrough at the ATP Tour level. He entered the International German Open having never won an ATP match but managed to reach the semifinals. He recorded four match wins at the event, including his first career victory against Robin Haase and his first top 20 victory over No. 16 Mikhail Youzhny before losing to No. 7 David Ferrer. He became the first 17-year old to defeat a top 20 opponent since Richard Gasquet in 2004 and the first to make a semifinal since Marin Čilić in 2006. Zverev had risen from No. 665 to No. 285 after his Challenger title, and his ATP 500 Series semifinal appearance took him to No. 161 in the world. He finished the season ranked No. 136.
Sources: en.wikipedia.org
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.
No. It has no approved medical indication in any country. Regulatory agencies have not cleared it for treatment or prevention of any condition.
Early clinical work stopped after rodent carcinogenicity findings. Those animal results raised concerns about long-term human risk, although direct human evidence is lacking. The human relevance of the tumors remains an open scientific question.
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.