Everything below concerns GW501516. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-04-28. Numbers and descriptions here follow the published literature rather than marketing material.
Early clinical research explored GW501516 for lipid disorders, obesity, and diabetes. Some short-term human studies reported changes in HDL cholesterol, LDL cholesterol, and triglycerides. The development program was discontinued after rodent studies showed dose-dependent tumor formation in multiple tissues, including liver, bladder, stomach, and skin. These findings raised concerns about long-term cancer risk in humans. Because human exposure data are limited, the clinical significance of the rodent tumors remains uncertain.
Literature on cardarine often separates receptor pharmacology from toxicology. Mechanistic papers describe PPARδ activation and gene expression changes, while safety assessments focus on carcinogenicity and species differences. Questions remain about whether rodent tumors arise through PPARδ-dependent or off-target mechanisms. Another open area is how human metabolism and exposure compare with those in animal studies. Analytical methods such as liquid chromatography–mass spectrometry are used to confirm identity in biological and product samples.
GW501516 acts as an agonist at the peroxisome proliferator-activated receptor delta, a nuclear receptor that regulates gene expression. Activation shifts transcription toward genes involved in fatty acid uptake, oxidation, and energy expenditure. The compound does not bind the androgen receptor and therefore differs from anabolic steroids and SARMs. In rodent models, this metabolic shift has been linked to increased running endurance and reduced fat accumulation. The exact downstream pathways in humans remain incompletely characterized.
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.
| Property | Value | Notes |
|---|---|---|
| Primary target | PPARδ | Nuclear receptor; not androgen receptor |
| Studied indications | Dyslipidemia; obesity; diabetes | Early clinical research; development discontinued |
| Rodent toxicity | Tumor formation in multiple tissues | Dose-dependent findings in some studies |
| Human approval | None | No approved therapeutic use |
| Typical analytical method | LC-MS/MS | Used for identity and quantification |
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.
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
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.
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.
The television spot which premiered during the Super Bowl LIII features archival documentary film footage from "66 Scenes from America" by Jørgen Leth of the pop artist Andy Warhol (1928–1987) unwrapping and eating a Whopper. The footage was approved for use by the fast food giant courtesy of the Andy Warhol Foundation. Meanwhile, prior to the game, the mass market hamburger chain made available to viewers who ordered it in advance via DoorDash an "Andy Warhol Mystery Box" which contains among other items a plastic bottle of ketchup and a platinum wig so one can "Eat Like Andy". On March 8, 2021, Burger King was criticized for their International Women's Day marketing campaign, after a tweet from Burger King UK stated, "Women belong in the kitchen". The tweets were labeled as sexist by thousands of Twitter users and dozens of news publications. Burger King UK followed up, stating "We're on a mission to change the gender ratio in the restaurant industry." However, critics said the damage had already been done. The initial tweet received high amounts of recognition and viewer interaction, while the replies received a fraction of the coverage, meaning only a few people are aware of the clarifications made by Burger King. Burger King deleted the tweet 12 hours later and posted an apology stating, "We got our initial tweet wrong and we're sorry." In late 2022, Burger King released the "Have it Your Way" commercials, going viral on social media such as TikTok after the 2022–23 NFL playoffs because of its large amount of repetition and catchiness.
=== Modeling === Unlike end point PCR (conventional PCR), real time PCR allows monitoring of the desired product at any point in the amplification process by measuring fluorescence (in real time frame, measurement is made of its level over a given threshold). A commonly employed method of DNA quantification by real-time PCR relies on plotting fluorescence against the number of cycles on a logarithmic scale. A threshold for detection of DNA-based fluorescence is set 3–5 times of the standard deviation of the signal noise above background. The number of cycles at which the fluorescence exceeds the threshold is called the threshold cycle (Ct) or, according to the MIQE guidelines, quantification cycle (Cq). Using this method, the greater the amount of starting mRNA, the lower the Cq. During the exponential amplification phase, the quantity of the target DNA template (amplicon) doubles every cycle. For example, a DNA sample whose Cq precedes that of another sample by 3 cycles contained 23 = 8 times more template. However, the efficiency of amplification is often variable among primers and templates. Therefore, the efficiency of a primer-template combination is assessed in a titration experiment with serial dilutions of DNA template to create a standard curve of the change in (Cq) with each dilution. The slope of the linear regression is then used to determine the efficiency of amplification, which is 100% if a dilution of 1:2 results in a (Cq) difference of 1.
Leela Kapila, Consultant Paediatric Surgeon, University Hospital, Nottingham. For services to Medicine. Fergal Patrick Keane, BBC Foreign Correspondent. For services to Television Journalism. John Kelly. For services to Agriculture and to Banking. John Charles King, Chief Executive, Security Facilities Executive, Cabinet Office (Office of Public Service). John Kirkham, lately Grade 6, Ministry of Agriculture, Fisheries and Food. Glen Kirton. For services to Association Football, particularly Euro 96. Alice Elizabeth Audrey Lamb. For services to Education. Penelope Lambert. For services to the Board of Visitors Her Majesty's Prison Whitemoor. Michael John Leech, Principal, Stevenson College, Edinburgh. For services to Education. Gilberte-Marie Brunsdon-Lenaerts. For services to Anglo-Belgian Relations. Ann Molyneux Lewis, lately President, Royal Pharmaceutical Society of Great Britain. For services to the Pharmacy Profession. Kenneth Lewis, Chairman, Horizon NHS Trust. For services to Health Care. Timothy Lewis. For services to the Police. Ian Stanley Cash Linney. For services to the community in Nottinghamshire. James Logan. For services to Aviation. Angus Victor Peck MacKay, Physician Superintendent, Argyll and Bute Hospital. For services to Medicine. William Alexander Lee MacKay, Vice Chairman, Management and Human Resources Committee, Association of District Councils. For services to Local Government. Lieutenant Colonel John Pierce Margarson, . For services to Soldiers' Sailors' and Airmens' Families Association in Clwyd.
The Sindh government under PPP abolished child marriages by making the legal marriage age eighteen years in the province under the Sindh Child Marriages Restraint Act, 2013. He as a member of the opposition in the National Assembly has also advocated that the legal marriage age should be made eighteen years across the country. On 4 May 2019 he tweeted, "UAE marriage age is 18, Indonesia is 18, and Turkey is also 18. Are they not Muslim countries? In Sindh where marriage age is 18, we saw how law stopped an adult marrying a 10-year-old! Every 20 minutes a girl dies in Pakistan as a result of underage pregnancy.
=== Local government === The rural areas of Jammu and Kashmir are governed by Panchayati Raj Institutions under the Jammu & Kashmir Panchayati Raj Act, 1989, which was passed in March 1989. It establishes a three-tier system of local government, similar to the rest of India: Halqa Panchayat at the village level, Block Development Council at the block level, and District Development Council at the district level. There are a total of 4291 halqa panchayats, 286 block development councils, and 20 district development councils. Urban areas of Jammu and Kashmir are governed by Urban Local Bodies under the J&K Municipal Corporation Act, 2000 and J&K Municipal Act, 2000. It provides for Municipal Corporations in cities with a population of one lakh or more, Municipal Councils for medium towns, and Municipal Committees for smaller towns. At present, there are 80 Urban Local Bodies (ULBs), including two Municipal Corporations (at Jammu and Srinagar), six Municipal Councils, and 72 Municipal Committees. Elections are held in every five years for these local bodies, and conducted by J&K State Election Commission.
Sources: en.wikipedia.org
== Uses == A precursor for mercaptan is 3-mercapto-3-methylbutanol (MMB). MMB is a chemical which gives a strong odor to cat urine. This smell is likely used for communicating amongst cats as well as scaring away predators and rivals. That is, the smell can mark their territory amongst other male cats and attract a female mate.
Eukaryotic translation initiation factor 5A-1 is a protein that in humans is encoded by the EIF5A gene. It is the only known protein to contain the unusual amino acid hypusine [Nε-(4-amino-2-hydroxybutyl)-lysine], which is synthesized on eIF5A at a specific lysine residue from the polyamine spermidine by two catalytic steps. EF-P is the bacterial homolog of eIF5A, which is modified post-translationally in a similar but distinct way. Both proteins are believed to catalyze peptide bond formation and help resolve ribosomal stalls, making them elongation factors despite the "initiation factor" name originally assigned.
The weathering of limestone, now exposed at the land surface, produces the lime-rich soils that are so prevalent in the fertile farmland of the Valley and Ridge province. During this continental break-up, around 600 million to 560 million years ago, volcanic activity was present along the tectonic margins. There is evidence of this activity in today's Blue Ridge Mountains. Mount Rogers, Whitetop Mountain, and Pine Mountain are all the result of volcanic activity that occurred around this time. Evidence of subsurface activity, dikes and sills intruding into the overlying rock, is present in the Blue Ridge as well. For instance, mafic rocks have been found along the Fries Fault in the central Blue Ridge area of Montgomery County, Virginia. One of the best examples of mafic rocks from the breakup of Rodinia is the Catoctin Formation. Erupted during the final stages of rifting associated with Rodinia (570–550 Ma), these rocks where later metamorphosed into Greenstone.
== Safe cities == Safe Cities Index 2019, published by the Economist Intelligence Unit, ranked 60 world cities on such criteria as personal safety, digital security, and infrastructure security. Bangkok ranked 47 of 60 (1=most safe; 60=least safe), tied with Ho Chi Minh City. Other ASEAN cities ranked were Singapore, 2; Kuala Lumpur, 35; Manila, 43; Jakarta, 53.
== See also == Hyperbaric chamber – in contrast to hypobaric chambers, a hyperbaric chamber places subjects under increased atmospheric pressure or increased oxygen saturation, or both, for purposes including improved wound healing.
Sources: en.wikipedia.org
=== Sub 1-GHz === D7A utilizes the 433, 868 and 916 MHz frequencies, which are globally available and license-free. Sub 1-GHz is ideal for wireless sensor networking applications, since it penetrates concrete and water, but also has the ability to propagate over very long ranges without requiring a large power draw on a battery. The low input current of typical tag configurations allows operating on coin cell or thin-film batteries.
This is a list of Ice Age species preserved as permafrost mummies during the Late Pleistocene. It includes all known species that have had their tissues partially preserved within the permafrost layer of the Arctic and Subarctic. Most went extinct during the Late Pleistocene extinctions while some are still extant today. They have been listed to the most specific known taxonomic rank.
==== MeSH D13.695.740 – pyrimidine nucleotides ==== MeSH D13.695.740.050 – apurinic acid MeSH D13.695.740.246 – cytosine nucleotides MeSH D13.695.740.246.050 – arabinofuranosylcytosine triphosphate MeSH D13.695.740.246.115 – cyclic cmp MeSH D13.695.740.246.150 – cytidine diphosphate MeSH D13.695.740.246.150.180 – cytidine diphosphate choline MeSH D13.695.740.246.150.210 – cytidine diphosphate diglycerides MeSH D13.695.740.246.370 – cytidine monophosphate MeSH D13.695.740.246.370.250 – cytidine monophosphate n-acetylneuraminic acid MeSH D13.695.740.246.400 – cytidine triphosphate MeSH D13.695.740.246.425 – deoxycytosine nucleotides MeSH D13.695.740.246.425.300 – deoxycytidine monophosphate MeSH D13.695.740.600 – pyrimidine dimers MeSH D13.695.740.706 – thymine nucleotides MeSH D13.695.740.706.788 – thymidine monophosphate MeSH D13.695.740.850 – uracil nucleotides MeSH D13.695.740.850.210 – deoxyuracil nucleotides MeSH D13.695.740.850.210.200 – fluorodeoxyuridylate MeSH D13.695.740.850.600 – uridine diphosphate MeSH D13.695.740.850.600.677 – uridine diphosphate sugars MeSH D13.695.740.850.600.677.100 – uridine diphosphate n-acetylgalactosamine MeSH D13.695.740.850.600.677.120 – uridine diphosphate n-acetylglucosamine MeSH D13.695.740.850.600.677.150 – uridine diphosphate n-acetylmuramic acid MeSH D13.695.740.850.600.677.300 – uridine diphosphate galactose MeSH D13.695.740.850.600.677.350 – uridine diphosphate glucose MeSH D13.695.740.850.600.677.375 – uridine diphosphate glucuronic acid MeSH D13.695.740.850.600.677.800 – uridine diphosphate xylose MeSH D13.695.740.850.877 – uridine monophosphate MeSH D13.695.740.850.950 – uridine triphosphate
== Life and career == Kossoff was born in Hackney, London, the youngest of three children, to poor Russian-Jewish parents, Annie (née Shaklovich) and Lewis (Louis) Kossoff (1882–1943). His father was a tailor. His older brother Alec changed his name to Alan Keith. The middle sister was named Sarah Rebecca (Sadie). He attended the North London Polytechnic, leaving in 1937 to work as a draughtsman and then a furniture designer for a year before becoming an actor. Kossoff started working in light entertainment on British television in the years following World War II, during which he briefly served in the military. His first stage appearance was at the Unity Theatre in 1942 at the age of 23. He took part in numerous plays and films. He was a Member of the Society of Artists and Designers. In addition to this, he was a Fellow of the Royal Society of Arts. In 1953, Kossoff played the character Lemuel "Lemmy" Barnet in the British sci-fi radio series Journey into Space. His best-known television roles were the hen-pecked husband Alf Larkin in The Larkins, first broadcast in 1958, and a Jewish furniture maker in A Little Big Business. Film credits included his role as Soviet diplomat Geza Szobek The Young Lovers (1954 – for which he won a British Academy Film Award as Most Promising Newcomer to Film), A Kid for Two Farthings (1955), his role as Morry in the Oscar-winning The Bespoke Overcoat (1956), Professor Kokintz in The Mouse that Roared (1959), starring Peter Sellers, and its sequel The Mouse on the Moon (1963) with Bernard Cribbins.
Sources: en.wikipedia.org
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.
Rodent studies found dose-dependent tumors in several organs. The sponsor discontinued the program over cancer concerns. Human risk from long-term use remains unknown.
Controlled human endurance trials are lacking. Animal studies show increased exercise capacity under some conditions. Anecdotal reports are not equivalent to clinical evidence.
Anti-doping and clinical laboratories commonly use liquid chromatography-tandem mass spectrometry. The method can identify GW501516 and its metabolites in urine or blood. Detection depends on sample timing and the amount present.