If you have been reading about anti-doping and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-07-30. Numbers and descriptions here follow the published literature rather than marketing material.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
=== Off-label promotion === Although some small, non-controlled studies in the 1990s—mostly sponsored by gabapentin's manufacturer—suggested that treatment for bipolar disorder with gabapentin may be promising, the preponderance of evidence suggests that it is not effective.
== Medical uses == Up to a certain point, the gut can adapt to partial resections that result in short bowel syndrome. Still, parenteral substitution of water, minerals and vitamins (depending on which part of the gut has been removed) is often necessary. Teduglutide may reduce or shorten the necessity of such infusions by improving the intestinal mucosa and possibly by other mechanisms.
Dharmalingam, a Malaysian executed on 27 April 2022 at 6:00 am for trafficking of heroin in 2009 2022: Kalwant Singh Jogindar Singh and Norasharee Gous, a Malaysian and Singaporean respectively, who were both executed on 7 July 2022 for diamorphine trafficking in 2013 2022: Nazeri Lajim, a Singaporean executed on 22 July 2022 for importing 33.89g of diamorphine in 2012 2022: Abdul Rahim Shapiee and Ong Seow Ping, who were both Singaporeans, were hanged on 5 August 2022 for trafficking diamorphine in 2015 2023: Tangaraju Suppiah, a Singaporean hanged on 26 April 2023 for trafficking 1 kg of marijuana. 2023: Mohd Aziz bin Hussain, a Singaporean hanged on 26 July 2023 for trafficking 49.98g of diamorphine in 2017. 2023: Saridewi Djamani, a Singaporean woman hanged on 28 July 2023 for trafficking 30.72g of diamorphine in 2016. 2023: Mohamed Shalleh Abdul Latiff, a Singaporean and former delivery driver hanged on 3 August 2023 for trafficking 54.04g of diamorphine in 2019. 2024: 39-year-old Malaysian Pausi Jefridin and 53-year-old Singaporean Roslan Bakar, who were both hanged on 15 November 2024 for trafficking 96.07g of diamorphine in 2008. 2024: Rosman Abdullah, a 55-year-old Singaporean hanged on 22 November 2024 for trafficking 57.43g of diamorphine in 2009. 2025: Roshdi Abdullah Altway, a Singaporean, was hanged on 10 April 2025 for trafficking 78.77g of diamorphine. Roshdi was previously sentenced to hang in 1994 for the murder of a CNB inspector before he appealed and successfully reduced his death sentence to ten years' prison for manslaughter.
=== Beginnings of molecular cytogenetics === In the 1980s, advances were made in molecular cytogenetics. While radioisotope-labeled probes had been hybridized with DNA since 1969, movement was now made in using fluorescent-labeled probes. Hybridizing them to chromosomal preparations using existing techniques came to be known as fluorescence in situ hybridization (FISH). This change significantly increased the usage of probing techniques as fluorescent-labeled probes are safer. Further advances in micromanipulation and examination of chromosomes led to the technique of chromosome microdissection whereby aberrations in chromosomal structure could be isolated, cloned, and studied in ever greater detail.
Sources: en.wikipedia.org
Health facilities use storage called purpose-built units (also referred to pharmaceutical-grade units). These refrigerators or freezers are specifically designed for the storage of biologics, including vaccines. These units differ from standard household-grade units since it has microprocessor-based temperature control with a digital temperature sensor (thermistor, thermocouple, or resistance temperature detector), and fan-forced air circulation to promote uniform temperature around the unit. These storage are usually a stand-alone refrigerator or freezers because they perform better at keeping the temperature constant. A Household-grade refrigerator can also be an acceptable alternative to purpose-built units. However, the freezer compartment of this type is not recommended to store vaccines, and vaccines should be stored centrally inside the refrigerator. Many combination units cool the refrigerator using air from the freezer, resulting in different temperature zones inside the fridge. Placing vaccines near the cold air output from the freezer could cause too low temperature, and placing it at the very bottom could cause too high temperature. It is important not to place vaccines near the storage unit doors because it affects the temperature and exposes vaccines to light, reducing potency for some vaccines.
The inner workings of The Culture are not especially described in detail though it is shown that the society is populated by an empowered, educated and augmented citizenry in a direct democracy or highly democratic and transparent system of self-governance. In comparisons to the real world, intended or not, the Culture could resemble various posited egalitarian societies including in the writings of Karl Marx, the end condition of communism after a withering away of the state, the anarchism of Bakunin and Fourier et al., libertarian socialism, council communism and anarcho-communism. Other characteristics of The Culture that are recognisable in real world politics include pacifism, post-capitalism, and transhumanism. Banks deliberately portrayed an imperfect utopia whose imperfection or weakness is related to its interaction with the 'other', that is, exterior civilisations and species that are sometimes variously warred with or mishandled through the Culture's Contact section which cannot always control its intrigues and the individuals it either 'employs' or interacts with. This 'dark side' of The Culture also alludes to or echoes mistakes and tragedies in 20th century Marxist–Leninist countries, although the Culture is generally portrayed as far more 'humane' and just.
Hemolysis or increased breakdown of red blood cells (for example hematoma resorption) Intrahepatic causes can be associated with elevated levels of conjugated bilirubin, unconjugated bilirubin or both. They include:
Dermorphin is a hepta-peptide first isolated from the skin of South American frogs belonging to the genus Phyllomedusa. The peptide is an agonist with high potency and selectivity to mu opioid receptors. Dermorphin is about 30–40 times more potent than morphine. The amino acid sequence of dermorphin is H-Tyr-D-Ala-Phe-Gly-Tyr-Pro-Ser-NH2. Dermorphin is not found in humans or other mammals and similar D-amino acid containing peptides have only been found in bacteria, amphibians, and molluscs. Dermorphin appears to be made via the posttranslational modification of a precursor peptide by an amino acid isomerase. This unusual process is needed because the D-alanine in this peptide is not part of the standard genetic code.
Apocarpous fruits develop from a single flower (while having one or more separate, unfused, carpels); they are the simple fruits. Syncarpous fruits develop from a single gynoecium (having two or more carpels fused together). Multiple fruits form from many flowers – i.e., an inflorescence of flowers.
Sources: en.wikipedia.org
=== Influence of temperature, relative humidity and rate of air circulation === The external drying conditions (temperature, relative humidity and air velocity) control the external boundary conditions for drying, and hence the drying rate, as well as affecting the rate of internal moisture movement. The drying rate is affected by external drying conditions, as will now be described.
=== Final Cuban offensive === Although the SADF and UNITA counteroffensive had been checked, FAPLA remained heavily strained and more dependent than before on its Cuban allies and Soviet materiel. This gave dos Santos an incentive to ease the military dilemma with negotiations and he reopened the possibility of reaching a new ceasefire and disengagement agreement with South Africa. As early as January 1987, Chester Crocker had responded to positive signals from Luanda, especially when President Denis Sassou Nguesso of the People's Republic of the Congo offered to mediate peace talks between the rival states. Yet preliminary discussions in Brazzaville throughout late 1987 and early 1988 remained stymied by the Angolan government's refusal to compromise on the timetable for a proposed Cuban withdrawal. The Cuban government had not been consulted on the Brazzaville talks in advance and resented what it perceived as a discourtesy on the part of dos Santos. This factor had the effect of persuading Castro to make an authoritative bid to join the Angolan-US peace talks. He was determined that Cuba no longer be excluded from negotiations concerning its own military, and the results of any future settlement on the withdrawal process leave Cuba's image untarnished.
origin of replication (ORI) Also replication origin or simply origin. A particular location within a DNA molecule at which DNA replication is initiated. Origins are usually defined by the presence of a particular replicator sequence or by specific chromatin patterns.
is the ideal gas speed of sound. The plus branch corresponds to the fast MHD wave mode, and the minus branch corresponds to the slow MHD wave mode. A summary of the properties of these waves is provided below:
=== Bond specificity === Bond specificity, unlike group specificity, recognizes particular chemical bond types. This differs from group specificity, as it is not reliant on the presence of particular functional groups in order to catalyze a particular reaction, but rather a certain bond type (for example, a peptide bond).
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
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.