A practical reference on PPARδ agonist: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-01-02 and is reviewed periodically as new material appears.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
Published literature on cardarine includes in vitro assays, rodent experiments, and a small number of human studies. Reports describe effects on exercise capacity and lipid metabolism in animals, while human evidence is sparse. Many online descriptions present the compound as a proven endurance aid, a claim not supported by regulatory approval or large clinical trials. Analytical studies focus on identifying the parent compound and its metabolites in biological samples. Important uncertainties include species differences, dose-response relationships, and the relevance of rodent tumor findings to humans.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Also called GW501516 and endurobol. |
| Chemical formula | C21H18F3NO3S2 | Molecular weight about 453.5 g/mol. |
| Appearance | White to off-white solid | Form depends on synthesis and purity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, protected from light | Common for research chemicals. |
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
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 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.
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.
The three substrates of this enzyme are an opine such as (2S)-2-[(R)-1-carboxyethylamino]pentanoic acid (1), oxidised nicotinamide adenine dinucleotide (NAD+), and water. When acting in the forward direction, the products in this example are L-norvaline, reduced NADH, pyruvic acid and a proton. The enzyme can also catalyse reactions that make opines by adding a molecule of pyruvic acid or other keto acids to L-amino acids. This includes making derivatives of L-methionine, L-isoleucine, L-valine, and L-phenylalanine.
=== 2012–2018: Change in pace === He starred alongside former co-star Steve Carell in the Don Scardino-directed comedy film The Incredible Burt Wonderstone (2013). Carrey played Steve Gray, a dangerous street magician who overshadows the formerly successful magician Burt Wonderstone (played by Carell). The film was released in March 2013 to mixed reviews and underperformed significantly at the box office, grossing just over $27 million on a $30 million budget. Around the same time, he appeared in Kick-Ass 2 (also 2013) as Colonel Stars and Stripes. He retracted support for the film two months prior to its release. He issued a statement via his Twitter account that, in light of the Sandy Hook Elementary School shooting, "Now in all good conscience I cannot support that level of violence." Peter Farrelly said in April 2012 that Carrey and Jeff Daniels would return for a Dumb and Dumber sequel, Dumb and Dumber To, with the Farrelly brothers writing and directing and a planned September 2012 production start. In June, however, Carrey's representative said Carrey had left the project because the comedian felt New Line and Warner Bros. were unenthusiastic toward it. However, on October 1, 2012, Yahoo!'s The Yo Show carried the news item that the script was complete and that the original actors, Carrey and Daniels, would be reprising their roles. The plot involved one of the characters having sired a child and needing to find them to obtain a kidney. Dumb and Dumber To was released in November 2014.
Enishi (Hokkaido) Teishu (Honshu) Iyo (Shikoku) Tsukushi (Kyushu) Ryugu (Okinawa) Like every other nation in the world, Yamato has its own Agents of the Four Seasons, each of whom has the duty to manifest their season in every part of the land. The Agents of Spring and Summer begin their journey on the island of Ryugu then move north, while the Agents of Autumn and Winter begin their journey on the island of Enishi, then head south. The role of "Agent" is bestowed by the deities of the seasons based on the physical, mental and spiritual eligibility of a blood descendant of the first Agent, and the chosen individual cannot in any way oppose their destiny. The bestowal occurs when the previous Agent dies or ceases to be eligible for the role. It is possible for an Agent, due to insufficient preparation or drastic events, to be unable to manifest their season, consequently extending the duration of the previous one. This is the case of the Agent of Spring, Hinagiku Kayo, a 16-year-old girl who was kidnapped by the Insurgents at the age of just 6. As a result, spring hasn't manifested in Yamato for 10 years, and winter, instead of lasting 3 months like the other seasons, has lasted 6 months during this period of time. However, the young Hinagiku has made her return and is now preparing to bring her season back to the nation, accompanied by her guard, Sakura Himedaka. It all begins on February 10th of the year 20 of the Reimei era, on the island of Ryugu.
Reta Phyllis Mays (born June 16, 1975) is an American serial killer who murdered at least seven elderly military veterans over a span of eleven months, between July 2017 and June 2018, by injecting them with lethal doses of insulin while she was employed as a nursing assistant at the Louis A. Johnson Veterans Medical Center, in Clarksburg, West Virginia. On May 11, 2021, Mays was sentenced to seven consecutive life sentences for the murders, plus 20 years for one count of assault with intent to commit murder.
BC Research Inc. is a privately owned Canadian process technology incubator, specializing in custom research, process development and technology commercialization. Headquartered in Vancouver, British Columbia, BC Research operates primarily from their Technology Commercialization and Innovation Centre on Mitchell Island in the Vancouver suburb of Richmond. This 40,000 sq-ft facility includes a 28,000 sq-ft pilot plant development area, 2,500 sq-ft laboratory space, 9,000 sq-ft of office space, as well as a small machine shop and fenced outdoor piloting space. Technologies are scaled up from concept to pilot or demonstration scale in preparation for commercialization. Engineering support is provided by sister companies NORAM Engineering and Constructors Ltd. Previously, BC Research was located at the BC Research and Innovation Complex at the south end of the University of British Columbia campus. This facility closed in November 2007. The company specialized in consulting and applied research and development in the area of plant biotechnology and environment, health and safety, process and analysis, transportation and ship dynamics.
Sources: en.wikipedia.org
RK2 was first isolated in connection with an outbreak of antibiotic-resistant Pseudomonas aeruginosa and Klebsiella aerogenes in Birmingham in 1969, as one of a family of plasmids implicated in transfer of ampicillin resistance between bacterial strains. Plasmids in the IncP-1 subgroup has been isolated from wastewater, agricultural soil, and hospitals. RK2 is approximately 60 kbp long and contains genes for replication, maintenance, conjugation and antibiotic resistance. The resistance genes confer resistance to the antibiotics kanamycin, ampicillin and tetracycline. In addition, RK2 contains a set of potentially lethal (to the cell) genes, called kil genes, and a set of complementary transcriptional repressor genes, called kor (short for "kil-override") genes, which inactivate the kil genes. The kil and kor genes together are suspected to play a role in the broad host range of RK2.
The reticulocyte production index (RPI), also called a corrected reticulocyte count (CRC), is a calculated value used in the diagnosis of anemia. This calculation is necessary because the raw reticulocyte count is misleading in anemic patients. The problem arises because the reticulocyte count is not really a count but rather a percentage: it reports the number of reticulocytes as a percentage of the number of red blood cells. In anemia, the patient's red blood cells are depleted, creating an erroneously elevated reticulocyte count.
The formation of chain structures has a direct impact on the overall strength of the whole polymer; the longer a chain is, the more differing the effects amylopectin will have on starch's morphology. Packing of chains, inter block chain length (IB-CL), also correlates with the gelatinization temperature of starch granules. In tandem, the IB-CL will increase as the length of B chains increases, meaning that as the length of individual B chains increases, so does the blocks between connections with other chains. Finally, in general, the more densely packed the resulting molecule of amylopectin, the higher the strength of the starch gel as a whole unit. Starch utilizes the density-strength correlation of amylopectin as a measure of forming dense, strong bricks as a basis for the final starch configuration. Amylopectin in starch is formed into helices to compose hexagonal structures that will subsequently be differentiated into A (cereal) and B (high-amylose; tubular) type starch. Structurally, A is more compact, while B is looser, hence the higher concentration of amylose.
=== Reconstructive surgery === Collagens are widely used in the construction of artificial skin substitutes used for managing severe burns and wounds. These collagens may be derived from cow, horse, pig, or even human sources; and are sometimes used in combination with silicones, glycosaminoglycans, fibroblasts, growth factors, and other substances.
=== Coating === Gelatin was first used as an external surface sizing for paper in 1337 and continued as a dominant sizing agent of all European papers through the mid-nineteenth century. In modern times, it is mostly found in watercolor paper, and occasionally in glossy printing papers, artistic papers, and playing cards. It maintains the wrinkles in crêpe paper.
Sources: en.wikipedia.org
Fission produces 133Xe, 137Xe, and 135Xe in roughly equal amounts but, after neutron capture, fission caesium contains more stable 133Cs (which however can become 134Cs on further neutron activation) and highly radioactive 137Cs than 135Cs.
=== Brand names === Insulin glargine/lixisenatide was called HOE901/AVE0010 during development and, as of October 2017, has been marketed under the brand names iGlarLixi, Lantus/Lyxumia, LixiLan, and Soliqua.
If a missense mutation is not deleterious, it will not be selected against and can contribute to species divergence. Over time, mutations occur randomly in individuals and can become fixed in populations if they are not selected against. Missense mutations are a type of mutation that are not neutral, and therefore can be acted on by selection. Selection cannot act on synonymous mutations (mutations that do not change anything phenotypically). Tracking missense mutations, like nonsynonymous SNPs, in ancestral species populations allow genealogies and phylogenetic trees to be created and evolutionary connections to be made. Missense mutation analysis is often used in evolutionary genetics to create relationships between species, as amino acid changes leading to protein changes are needed for species to diverge from each other.
==== Bands ==== Opus (Austrian band), an Austrian pop-rock group Opus (Yugoslav band), a Yugoslav progressive rock group Opus (Latvian band), Latvian music group Pur (band), a German pop group originally known as "Opus"
Sources: en.wikipedia.org
Cardarine is a common name for the investigational compound GW501516. It acts as a PPARδ agonist and is not approved for human use. It is prohibited in sport.
It activates PPARδ, a nuclear receptor that influences gene expression related to lipid and energy metabolism. Animal studies show changes in endurance and lipid levels. Human effects and risks are not well established.
No, cardarine is not a steroid. It belongs to a different chemical class, the PPARδ agonists. It is also not a selective androgen receptor modulator.
Legal status varies by country. It is not approved as a medicine, and it is prohibited in sport. Some jurisdictions restrict import, sale, or possession.