The short version of fatty acid oxidation fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-04-03. Anything still debated is marked as such rather than presented as settled.
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.
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.
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 |
|---|---|---|
| Solubility | Soluble in dimethyl sulfoxide and some organic solvents; practically insoluble in water | Solvent choice affects laboratory handling |
| Typical storage | -20 °C, desiccated, protected from light | Common condition for research samples |
| Analytical method | Liquid chromatography–tandem mass spectrometry (LC-MS/MS) | Used for identification and quantification in biological or product samples |
| Common synonyms | GW501516, GW-501516, GSK-516, Endurobol | Names found in research and anti-doping literature |
| Regulatory status | Unapproved therapeutic; prohibited in competitive sport | Status can vary by country and context |
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
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.
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.
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.
Remineralisation of tooth enamel involves the reintroduction of mineral ions into demineralised enamel. Hydroxyapatite is the main mineral component of enamel in teeth. During demineralisation, calcium and phosphorus ions are drawn out from the hydroxyapatite. The mineral ions introduced during remineralisation restores the structure of the hydroxyapatite crystals. When fluoride ions are present during the remineralisation process, either through water fluoridation or the use of fluoride-containing toothpaste, the stronger and more acid-resistant fluorapatite crystals form instead of hydroxyapatite crystals.
Narrated by Piers Gibbon, produced by Will Aslett, directed by Peter Webber, made with Discovery Channel 12 April Living Dangerously, about people who take risks, if that involves low monoamine oxidase, with John Henry (toxicologist); two base jumpers, John and Elliott, climb a 500 ft television transmitter in December 1998; men have lower levels of MAO than women, and MAO increases with age, so men in their 20s have the least aversion to risk; possible dangers of the Minulet contraceptive (ethinylestradiol/gestodene); health scares may be out of proportion to the risk involved, and is overegging the pudding. Directed by Chris Wells, produced by Hilary Lawson, made by TVF Media with the Discovery Channel 19 April Riddle of the Leaning Tower, about the Leaning Tower of Pisa; in 1995, the tower was moving at 1mm a year; civil engineer John Burland; construction began in 1172, and construction stopped for 100 years; Piero Pierotti of the University of Pisa; the 1997 Umbria and Marche earthquake took place on 26 September 1997; haste was required, so in 1998 soil extraction was approved to attempt to moderate the lean of the tower; soil extraction began in February 1999, and the tower began to move.
== Biological activity == L-Proline has been found to act as a weak agonist of the glycine receptor and of both NMDA and non-NMDA (AMPA/kainate) ionotropic glutamate receptors. It has been proposed to be a potential endogenous excitotoxin. In plants, proline accumulation is a common physiological response to various stresses but is also part of the developmental program in generative tissues (e.g. pollen). EPRS1 charges with proline to transfer it to tRNA, which can incorporate it into newly synthesized peptide chain during protein translation.
Sources: en.wikipedia.org
== Legacy == BioShock has received praise for its artistic style and compelling storytelling. In their book, Digital Culture: Understanding New Media, Glen Creeber and Royston Martin perform a case study of BioShock as a critical analysis of video games as an artistic medium. They praised the game for its visuals, sound, and ability to engage the player into the story. They viewed BioShock as a sign of the "coming of age" of video games as an artistic medium. John Lanchester of the London Review of Books recognized BioShock as one of the first video games to break into coverage of mainstream media to be covered as a work of art arising from its narrative aspects, whereas before video games had failed to enter into the "cultural discourse", or otherwise covered due to moral controversies they created. Peter Suderman for Vox in 2016 wrote that BioShock was the first game that demonstrated that video games could be a work of art, particularly highlighting that the game plays on the theme of giving the illusion of individual control. In February 2011, the Smithsonian Institution announced it would hold an exhibit dedicated to the art of video games. Several games were chosen by the Smithsonian's curators; when the public voted for additional games they felt deserved to be included in the exhibition, BioShock was among the winners.
==== School of Computer, Mathematical, & Natural Sciences ==== The School of Computer, Mathematical, & Natural Sciences offers undergraduate majors and minors as well as graduate degree programs in the natural and formal sciences. The chemistry program is approved by the American Chemical Society (ACS). The medical laboratory science program is accredited by the National Accrediting Agency for Clinical Laboratory Sciences (NAACLS) and the American Society for Clinical Pathology (ASCP). The actuarial science program is approved by the Society of Actuaries (SOA). It also hosts the university's environmental and aquatic research laboratory, PEARL.
== Background == Peptides can serve as sturdy building blocks for a wide range of materials as they can be designed to combine with a range of other building blocks such as lipids, sugars, nucleic acids, metallic nanocrystals, and so on; this gives the peptides an edge over carbon nanotubes, which are another popular nanomaterial, as the carbon structure is unreactive. They also exhibit biocompatibility and molecular recognition; the latter is particularly useful as it enables specific selectivity for building ordered nanostructures. Additionally, peptides have superb resistance to extreme temperature, detergents, and denaturants. The ability of peptides to perform self-assembly allows them to be used as fabrication tools, which will continue to grow as a fundamental part of nanomaterials production. The self-assembling of peptides is facilitated through the molecules' structural and chemical compatibility with each other. The structures formed demonstrate physical and chemical stability. An advantage to using self-assembling peptides to build nanostructures in a bottom-up approach is that specific features can be incorporated; the peptides can be modified to serve specific functions. This approach means the final structures are made from the self-integration of small, simple building blocks. This approach is needed for nanoscale structure, as the top-down method of miniaturizing devices using sophisticated lithography and etching techniques has reached a physical limit.
=== Diseases === P. somniferum is susceptible to several fungal, insect and virus infections including seed borne diseases such as downy mildew and root rot. The use of pesticides in combination to cultural methods have been considered as major control measures for various poppy diseases. The fungal pathogen Peronospora arborescens, the causal agent of downy mildew, occurs preferentially during wet and humid conditions. This oomycete penetrates the roots through oospores and infects the leaves as conidia in a secondary infection. The fungus causes hypertrophy and curvature of the stem and flower stalks. The symptoms are chlorosis and curling of the affected tissues with necrotic spots. The leaf under-surface is covered with a downy mildew coating containing conidiospores that spread the infection further leading to plant damage and death. Another downy mildew species, Peronospora somniferi, produces systemic infections leading to stunting and deformation of poppy plants. Downy mildew can be controlled preventively at the initial stage of seed development through several fungicide applications. Leaf blight caused by the fungus Helminthosporium papaveris is one of the most destructive poppy diseases worldwide. The seed-borne fungus causes root rot in young plants and stunted stems in plants at a higher development stage, where leaf spots appear on the leaves and is being transmitted to capsules and seeds.
Sources: en.wikipedia.org
A stereogenic center (or stereocenter) is an atom such that swapping the positions of two ligands (connected groups) on that atom results in a molecule that is stereoisomeric to the original. For example, a common case is a tetrahedral carbon bonded to four distinct groups a, b, c, and d (Cabcd), where swapping any two groups (e.g., Cbacd) leads to a stereoisomer of the original, so the central C is a stereocenter. Many chiral molecules have point chirality, namely a single chiral stereogenic center that coincides with an atom. This stereogenic center usually has four or more bonds to different groups and may be carbon (as in many biological molecules), phosphorus (as in many organophosphates), silicon, or a metal (as in many chiral coordination compounds). However, a stereogenic center can also be a trivalent atom whose bonds are not in the same plane, such as phosphorus in P-chiral phosphines (PRR′R″) and sulfur in S-chiral sulfoxides (OSRR′), because a lone-pair of electrons is present instead of a fourth bond.
When it became evident that the police was incapable of containing the uprising, the South African Defence Force (SADF) was deployed to assist police operations – first in Joza township, outside Grahamstown, on 6 October, and then in Soweto the following morning. Radio Freedom welcomed the deployments as a sign of the apartheid regime's desperation, declaring, "There is no way out for the Botha regime... Botha’s guns and batons are failing." On 23 October, military repression accelerated in earnest with the launch of Operation Palmiet (Afrikaans for "bullrush") in Sebokeng and three nearby townships, Sharpeville, Boipatong, and Bophelong. As part of a campaign to "rid the area of criminal and revolutionary elements", a heavily armed joint force of 7,000 police and SADF members cordoned off the townships and conducted a house-to-house search of about 19,500 houses, accommodating an estimated 225,000 people. After being searched in their home and at roadblocks, residents were given labels or ink to wear to prove that they had been "vetted" and were allowed to move around. The labels bore the printed slogan, "I am your friend, trust me", while stamps on people's hands read "friendly forces". The Washington Post said that it was "the biggest crackdown on political dissent ever mounted" in South Africa, as well as the first time that the military had been "employed so openly to quell racial dissent".
microtome An instrument used to cut extremely thin slices of material, known as microsections or simply sections, preparatory to observation under a microscope. Sections of tissues and cells are usually 50 nanometres (nm) to 100 micrometres (μm) in width. The process of cutting them is known as microtomy.
John Ronald Reuel Tolkien was born on 3 January 1892 in Bloemfontein in the Orange Free State (later annexed by the British Empire; now Free State Province in the Republic of South Africa), to Arthur Reuel Tolkien, an English bank manager, and his wife Mabel, née Suffield. The couple had left England when Arthur was promoted to head the Bloemfontein office of the British bank for which he worked. Tolkien had one sibling, his younger brother, Hilary Arthur Reuel Tolkien, who was born on 17 February 1894. As a child Tolkien was bitten by a large baboon spider in the garden, an event some believe to have been later echoed in his stories, although he admitted no actual memory of the event as an adult. In an earlier incident from Tolkien's infancy, a young family servant took the baby to his homestead, returning him the next morning. When he was three, he went to England with his mother and brother on what was intended to be a lengthy family visit, but his father died in South Africa of rheumatic fever before he could join them. This left the family without an income, so Tolkien's mother took him to live with her parents in Kings Heath, Birmingham. Soon after, in 1896, they moved to Sarehole (now in Hall Green), then a Worcestershire village, later annexed to Birmingham. He enjoyed exploring Sarehole Mill and Moseley Bog and the Clent, Lickey and Malvern Hills, which would later inspire scenes in his books, along with nearby towns and villages such as Bromsgrove, Alcester and Alvechurch and places such as his aunt Jane's farm Bag End, the name of which he used in his fiction.
=== Myomesin 1 === Myomesin 1 is the most researched of the forms of myomesin due to its presence in all striated muscles and that it is the largest of the myomesin class. It is sometimes just simply called myomesin because of it widespread expression. Myomesin 1 is found in mainly on the M4/M4' lines of the M-band. It is encoded by the MYOM1 gene. There are two variants of myomesin 1, one located between the My6 and My7 domains, and the other at the end of the C-terminal after the My13 domain. The prior is known as the embryonic heart (EH)-sequence and the latter, which has only been found in birds, is called the H or S splice variant (H is for heart and S is for skeletal). EH-myomesin can be found during embryonic development of the human heart (later replaced by myomesin 2). As the muscle matures, EH-myomesin is downregulated in favor of myomesin 1 with no genetic variations.
Sources: en.wikipedia.org
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.
No. It is not an anabolic-androgenic steroid; it is a synthetic PPARδ agonist. Because it is banned in sport, it is sometimes grouped with doping agents even though its chemical class differs from steroids.
Human data are limited and development was discontinued, so major effects and long-term risks are not well characterized. Some early studies examined metabolic markers, but they do not provide a basis for unsupervised use.
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.