This is a working overview of PPAR delta, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2026-01-17 and is reviewed periodically as new material appears.
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.
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.
| Property | Value | Notes |
|---|---|---|
| CAS Registry Number | 317318-70-0 | Unique identifier for the compound. |
| Chemical class | PPARδ agonist | Synthetic ligand for peroxisome proliferator-activated receptor delta. |
| Appearance | White to off-white solid | Typical form of research-grade material. |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water. |
| Typical storage | -20°C | Recommended for long-term storage of stock solutions. |
Published human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
Anti-doping laboratories identify GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the usual matrix, and detection can occur after the parent compound has cleared from blood. The exact detection window depends on dose, formulation, individual metabolism, and assay sensitivity. Because the compound is prohibited at all times, athletes are subject to testing in and out of competition. Analytical methods continue to improve as new metabolites and designer analogs are characterized.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
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.
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.
== Structural function in proteins == Since the asparagine side-chain can form hydrogen bond interactions with the peptide backbone, asparagine residues are often found near the beginning of alpha-helices as asx turns and asx motifs, and in similar turn motifs, or as amide rings, in beta sheets. Its role can be thought as "capping" the hydrogen bond interactions that would otherwise be satisfied by the polypeptide backbone. Asparagine also provides key sites for N-linked glycosylation, modification of the protein chain with the addition of carbohydrate chains. Typically, a carbohydrate tree can solely be added to an asparagine residue if the latter is flanked on the C side by X-serine or X-threonine, where X is any amino acid with the exception of proline. Asparagine can be hydroxylated in the HIF1 hypoxia-inducible transcription factor. This modification inhibits HIF1-mediated gene activation.
Following the arrival of the Coalition into power in 2010, he was commissioned to draw up "Plan H" or "No Stone Left Unturned" to stimulate growth in local areas. Since then, 81 out of his 89 recommendations have been adopted. At the 2013 Budget, the Coalition pledged to pool billions of pounds of regional spending into a single fund in a bid to de-centralise public spending and boost economic growth outside London.
=== Muscle and fat tissue === Microwave burns show some similarities with electrical burns, as the tissue damage is deep rather than superficial. Adipose tissue shows less degree of damage than muscles and other water-rich tissues. (In contrast, radiant heat, contact burns and chemical burns damage subcutaneous adipose tissue to higher extent than deeper muscle tissue.) Full-thickness biopsy of the area between burned and unburned skin shows layers of more and less damaged tissue (tissue sparing), layers of undamaged fat between damaged muscles; a pattern that is not present in conventional thermal or chemical burns. Cells subjected to electrical burns show microscopic nuclear streaming on histology examination; this feature is not present with microwave burns. Microwaves also deposit more energy to areas with low blood supply and to tissue interfaces. Hot spots may be formed in the tissue, with a consequent higher absorption of microwave energy and even higher temperature achieved, with localized necrosis of the affected tissue following. Sometimes, the affected tissue can even be charred. Muscle tissue destruction can lead to myoglobinuria, with renal failure following in severe cases; this is similar to burns from electric current. Urinalysis and serum CPK, BUN and creatine tests are used to check for this condition.
Bananas, like most organic material, naturally contain a certain amount of radioactive isotopes—even in the absence of any artificial pollution or contamination. The banana equivalent dose, defined as the additional dose a person will absorb from eating one banana, expresses the severity of exposure to radiation, such as resulting from nuclear weapons or medical procedures, in terms that would make sense to most people. This is approximately 78 nanosieverts – in informal publications one often sees this estimate rounded up to 0.1 μSv.
SNP detection through molecular beacons makes use of a specifically engineered single-stranded oligonucleotide probe. The oligonucleotide is designed such that there are complementary regions at each end and a probe sequence located in between. This design allows the probe to take on a hairpin, or stem-loop, structure in its natural, isolated state. Attached to one end of the probe is a fluorophore and to the other end a fluorescence quencher. Because of the stem-loop structure of the probe, the fluorophore is close to the quencher, thus preventing the molecule from emitting any fluorescence. The molecule is also engineered such that only the probe sequence is complementary to the genomic DNA that will be used in the assay. If the probe sequence of the molecular beacon encounters its target genomic DNA during the assay, it will anneal and hybridize. Because of the length of the probe sequence, the hairpin segment of the probe will be denatured in favour of forming a longer, more stable probe-target hybrid. This conformational change permits the fluorophore and quencher to be free of their tight proximity due to the hairpin association, allowing the molecule to fluoresce.
Sources: en.wikipedia.org
Oxaloacetic acid (also known as oxalacetic acid or OAA) is a crystalline organic compound with the chemical formula HO2CC(O)CH2CO2H. Oxaloacetic acid, in the form of its conjugate base oxaloacetate, is a metabolic intermediate in many processes that occur in animals. It takes part in gluconeogenesis, the urea cycle, the glyoxylate cycle, amino acid synthesis, fatty acid synthesis and the citric acid cycle.
This experience has been described as "the most consequential mescaline trip of the sixties", as it caused Shulgin to redirect his focus and life's work to psychedelic chemistry. Starting in the 1960s, Shulgin synthesized and gradually described hundreds of novel synthetic psychedelics as well as entactogens in scientific publications and published books such as PiHKAL (1991) and TiHKAL (1997). Notable major examples of these drugs have included the DOx psychedelic DOM, the 2C psychedelic 2C-B, and the MDxx entactogen MDMA, among others. However, MDMA was not an original creation of Shulgin's but had previously been first synthesized in 1912 and had surfaced as a recreational drug related to MDA by the mid- to late-1960s. Instead, Shulgin had merely served to help popularize and spread awareness about MDMA and its unique effects. MDMA became outlawed in the mid-1980s. In response to this, the Multidisciplinary Association for Psychedelic Studies (MAPS) was founded by Rick Doblin in 1986 and began efforts to develop MDMA and other psychedelics as medicines. American chemist David E. Nichols has developed numerous novel psychedelics and entactogens from the 1970s to present. Swiss chemist Daniel Trachsel, sometimes referred to as the "German Shulgin", has also developed and published numerous novel psychedelics as well as entactogens since the 1990s. NBOMe psychedelics such as 25I-NBOMe, derived from structural modification of 2C psychedelics, were first described by Ralf Heim and colleagues by 2000.
Military rations have existed since the beginnings of organized warfare. Some form of military food distribution and ration system has existed in practically every region and recorded era in history. However, for the most part, food actually brought into the field with military forces was uncommon; most of what could be considered "field rations" were, until around the early modern period, stable ingredients (such as grains), easily or already preserved foods, food soldiers brought with them, and livestock. As most reliable food preservation methods did not exist, military food at the time focused more on foods that could keep and transit well, such as hardtack, rather than foods that were nutritious. Modern field rations took recognizable forms with the inventions of airtight food preservation, tin cans, and pasteurization in the 19th century. Canned and preserved rations became standard in both World War I and World War II, with modern ration configurations being developed and becoming standard during and after the Cold War.
An individual who both initiates and conducts, alone or with others, a clinical trial, and under whose immediate direction the investigational product is administered to, dispensed to, or used by a subject. The term does not include any person other than an individual (e.g., it does not include a corporation or an agency). The obligations of a sponsor-investigator include both those of a sponsor and those of an investigator. (ICH E6) An individual who both initiates and actually conducts, alone or with others, a clinical investigation, i.e., under whose immediate direction the test article is administered or dispensed to, or used involving, a subject. The term does not include any person other than an individual, e.g., corporation or agency. (21CFR50.3) Standard treatment
Sources: en.wikipedia.org
== Epidemiology == CGD affects about 1 in 200,000 people in the United States, with about 20 new cases diagnosed each year. Chronic granulomatous disease affects all people of all races; however, there is limited information on prevalence outside of the United States. One survey in Sweden reported an incidence of 1 in 220,000 people, while a larger review of studies in Europe suggested a lower rate: 1 in 250,000 people.
=== Awards === The Orange Box won a number of awards for its overall high standard and use of technology. The compilation won "Computer Game of the Year" at the Academy of Interactive Arts & Sciences' 11th Annual Interactive Achievement Awards; it also received nominations in the "Overall Game of the Year", "Action Game of the Year", and "Outstanding Innovation in Gaming" categories. The Orange Box won the "Breakthrough Technology Award" and the "Best PC Game Award" at the 2007 Spike Video Game Awards, and was additionally nominated in the "Game of the Year", "Best Shooter", "Best Xbox 360 Game", and "Best Multiplayer Game" categories. It was also named the second-best video game of 2007 by Time Magazine, while the PlayStation 3 version was nominated in the category of Action and Adventure at the BAFTA Video Games Awards. Valve also received developer awards for their work on The Orange Box. The Orange Box received 17 Game of the Year awards and over 100 awards in total. The Orange Box was placed as the 22nd most influential video game in history by the Guinness World Records Gamer's Edition, 2009. Portal won "Outstanding Achievement in Game Design", "Outstanding Achievement in Gameplay Engineering", and "Outstanding Character Performance" for Ellen McLain's vocal portrayal of GLaDOS at the 11th Annual Interactive Achievement Awards. The game won 76 awards, including 37 Game of the Year awards, and was recognized for innovative design and game mechanics. The dark humor of Portal and the ending music track "Still Alive" were also singled out for awards.
A CAMP test is used to differentiate between Streptococcus agalactiae and other species of beta-hemolytic Streptococcus. This biochemical test uses the fact that Streptococcus agalactiae excretes a CAMP substance, making it slightly more hemolytic, which can be observed on blood agar media.
Both pathways rely on 5α-reductase, but in the androgen backdoor pathway, this enzyme acts on C21 steroids (pregnanes), initiating a series of chemical reactions that eventually lead to dihydrotestosterone production. In contrast, in the canonical pathway, 5α-reductase targets the 4,5-double bond in testosterone, producing dihydrotestosterone directly. The backdoor pathway was initially described as a biosynthetic route where 5α-reduction of 17α-hydroxyprogesterone ultimately leads to dihydrotestosterone. Since then, several other pathways have been discovered that lead to 11-oxygenated androgens which are also physiologically significant.
Albumin is a protein made specifically by the liver, and can be measured cheaply and easily. It is the main constituent of total protein (the remaining constituents are primarily globulins). Albumin levels are decreased in chronic liver disease, such as cirrhosis. It is also decreased in nephrotic syndrome, where it is lost through the urine. The consequence of low albumin can be edema since the intravascular oncotic pressure becomes lower than the extravascular space. An alternative to albumin measurement is prealbumin, which is better at detecting acute changes (half-life of albumin and prealbumin is about 2 weeks and about 2 days, respectively).
Sources: en.wikipedia.org
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.
No. Cardarine is not an anabolic steroid; it belongs to a different chemical class that targets PPARδ. Steroids act primarily through androgen receptors, while cardarine acts through a nuclear receptor involved in metabolism.
Some rodent studies reported increased endurance and changes in fat metabolism after cardarine exposure. Long-term studies in animals also raised concerns about cancer in certain tissues. Human trial data are limited, so these findings cannot be directly translated to people.
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.