Everything below concerns Anti-doping. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-08-01. Numbers and descriptions here follow the published literature rather than marketing material.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | PPARδ agonist | Not an anabolic steroid. |
| Common synonyms | GW501516, GW-1516 | Cardarine is an informal name. |
| Appearance | White to off-white powder | Typical for research-grade solid. |
| Solubility class | Poorly soluble in water; soluble in some organic solvents | Such as DMSO or ethanol in laboratory settings. |
| Typical storage temperature | Cool, dry, protected from light | Specific conditions vary by supplier and form. |
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.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
Regulatory treatment of cardarine differs by context and jurisdiction. In competitive sport, the World Anti-Doping Agency lists PPARδ agonists, including GW501516, as prohibited at all times. Outside sport, it lacks approval as a prescription medicine in major drug markets, and products sold for human consumption may be treated as unapproved drugs. Some countries also restrict importation or sale through general consumer protection and medicines laws. These classifications affect availability, testing, and legal risk without establishing therapeutic value.
Because cardarine is not an approved medicine, no pharmacopeial monograph defines its identity, purity, or storage requirements. Laboratories typically rely on in-house methods and reference standards when testing materials labeled as GW501516. Certificates of analysis may report purity and identity for a specific batch, but their scope varies and they do not guarantee safety or legal status. Independent verification can include high-performance liquid chromatography, mass spectrometry, nuclear magnetic resonance, and elemental analysis. The distinction between research chemical labeling and human use is significant because quality standards and oversight differ.
Specialist Physiotherapist in Parkinson's Disease, University Hospitals of Derby and Burton NHS Foundation Trust. For services to Physiotherapy. Brenda Anne Lines. Chair, Big Local DY10. For services to the community in Kidderminster, Worcestershire. Richard John Linley. Lately Senior Inspector of Courses, British Horseracing Authority. For services to Horse Racing. Antony Lishak. Chief Executive, Learning from the Righteous. For services to Holocaust Education. Sharon Louise Livermore. Founder, Domestic Abuse Education and Director, Kameo Recruitment. For services to the Victims of Domestic Abuse. Shalom Ijeoma Lloyd. Director, Naturally Tiwa Skincare. For services to International Trade and to Women in Business. Dr. Leonard Malcolm Lofts. Patron and Lately Chief Executive, Northam Care Trust. For services to People with Disabilities in Devon. Joanne Elizabeth Loftus. Lately Civil Secretary, Ministry of Defence. For services to Defence. Louise Long. Chief Executive, Inverclyde Council. For services to Local Government and to the community in Inverclyde, Renfrewshire. Maria Victoria Rodriguez Lopez. Head of Partnerships, Scottish Government. For services to Minority Ethnic Communities in Scotland during Covid-19. Paul John Lord. Director of Sport and Senior Leader, Westcroft Special School. For services to Children and Young People with Special Educational Needs. Andrew McLauchlan Lothian. Founder and Director, Insights Learning and Development. For services to Personal and Professional Development. Dickon Rutherford Love. For services to Bell-Ringing in London and Kent.
The CDC Good laboratory practice guidelines for newborn screening recommend that "laboratory specimen retention procedures should be consistent with patient decisions." Researchers have described the NBS samples as a gold mine representing a patient population that would otherwise be impossible to get. The American Civil Liberties Union (ACLU), Council for Responsible Genetics(CRG), and the International Association of Privacy Professionals(IAPP) oppose the long term storage of identifiable NBS blood spots. In 2009, the Texas NBS program had to destroy millions of stored blood spots that had been stored for decades without consent. In Michigan, a 2022 lawsuit found that the NBS program long term storage and sales to third-parties was found to violate state statues noting how "post-testing conduct is not necessary to effectuate that interest because 'the health of the child is no longer at stake.'" In New Jersey, the Institute for Justice filed a class-action lawsuit in 2022 under the 4th amendment seeking to limit the retention period of NBS cards after they were found to be used in warrantless law enforcement investigations without consent.
Isotonitazepyne (N-pyrrolidino-isotonitazene, NPI) is a benzimidazole derivative with potent opioid effects, which has been sold as a designer drug over the internet. Its in vitro potency is approximately 1000 times that of morphine. One sample of counterfeit oxycodone pills were found to contain between 3.3 and 3.5 mg of NPI per pill and no oxycodone.
Sources: en.wikipedia.org
== Origin and properties == The Natural History by the Roman writer Pliny the Elder includes a few sentences about a volcanic glass called obsidian (lapis obsidianus), discovered in Ethiopia by Obsidius, a Roman explorer. Obsidian is formed from quickly cooled lava. Extrusive formation of obsidian may occur when felsic lava cools rapidly at the edges of a felsic lava flow or volcanic dome, or when lava cools during sudden contact with water or air. Intrusive formation of obsidian may occur when felsic lava cools along the edges of a dike. Tektites were once thought by many to be obsidian produced by lunar volcanic eruptions, though few scientists now adhere to this hypothesis. Obsidian is mineral-like, but not a true mineral because, as a glass, it is not crystalline; in addition, its composition is too variable to be classified as a mineral. It is sometimes classified as a mineraloid. Though obsidian is usually dark in color, similar to mafic rocks such as basalt, the composition of obsidian is extremely felsic. Obsidian consists mainly of SiO2 (silicon dioxide), usually 70% by weight or more; the remainder consists of variable amounts of other oxides, mostly oxides of aluminium, iron, potassium, sodium and calcium. Crystalline rocks with a similar composition include granite and rhyolite. Because obsidian is metastable at the Earth's surface (over time the glass devitrifies, becoming fine-grained mineral crystals), obsidian older than Miocene in age is rare. Exceptionally old obsidians include a Cretaceous welded tuff and a partially devitrified Ordovician perlite.
==== Robust transport networks ==== According to FAO, robust transport networks can prevent or limit increases in travel time – and consequent impacts on food costs – when an adverse event limits or prevents access to critical network links. For example, flooding, whether from flash floods or from longer-term stagnant flooding, reduces the connectivity of any transport network, impacting the movement of people, goods and societal functioning in general. Damage from flooding can indirectly affect larger areas for a longer period of time, such as when there are traffic delays and congestion on alternative routes, increased journey distances/durations, increased fuel consumption and associated greenhouse gas (GHG) emissions. Due to climate change, transport networks are increasingly being exposed to extreme weather events. A study on the transport networks of 90 countries finds that where food is transported more locally and where the network is denser – such as in high-income countries and densely populated countries like China, India, Nigeria and Pakistan –, systematic disturbances have a much lower impact. Conversely, low-income countries have much lower levels of transport network resilience, although some exceptions exist. The study further simulates the effect of potential disruptions – namely floods – to food transport networks which illustrate that the loss of network connectivity that results when links become impassable potentially affects millions of people.
== Background == The summit was held on the French shore of Lake Geneva, close to the border with Switzerland. Because delegations were expected to arrive through Geneva Airport, the event required security coordination between France, Switzerland and the Swiss cantons of Geneva, Vaud and Valais. The summit had initially been announced for 14–16 June 2026, but was later postponed by a day to 15–17 June, to avoid a clash with the planned UFC Freedom 250 mixed martial arts event held on US president Donald Trump's birthday. French president Emmanuel Macron made the reduction of global economic imbalances a priority for France's G7 presidency, citing industrial overcapacity, underinvestment, excessive debt, deregulation and low private investment in developing countries among the threats to economic stability. The summit took place in the aftermath of reports of a memorandum of understanding between the US and Iran aimed at ending the Iran War and reopening the Strait of Hormuz. Trump signed the memorandum at the Palace of Versailles on 17 June 2026, during a dinner hosted by Macron after the summit.
Sources: en.wikipedia.org
Elevated ITGA1 expression correlates with activation of survival pathways and is regulated through a non-coding RNA mechanism involving hsa_circ_0110757, which increases ITGA1 expression by suppressing hsa-miR-1298-5p.
=== Detection in biological fluids === Atomoxetine may be quantitated in plasma, serum, or whole blood to distinguish extensive versus poor metabolizers in those receiving the drug therapeutically, to confirm the diagnosis in potential poisoning victims, or to assist in the forensic investigation in a case of fatal overdosage.
The main use of BCG is for vaccination against tuberculosis. BCG vaccine can be administered after birth intradermally. BCG vaccination can cause a false positive Mantoux test. The most controversial aspect of BCG is the variable efficacy found in different clinical trials, which appears to depend on geography. Trials in the UK consistently show a 60 to 80% protective effect. Still, those trials conducted elsewhere have shown no protective effect, and efficacy appears to fall the closer one gets to the equator. A 1994 systematic review found that BCG reduces the risk of getting tuberculosis by about 50%. Differences in effectiveness depend on region, due to factors such as genetic differences in the populations, changes in environment, exposure to other bacterial infections, and conditions in the laboratory where the vaccine is grown, including genetic differences between the strains being cultured and the choice of growth medium. A systematic review and meta-analysis conducted in 2014 demonstrated that the BCG vaccine reduced infections by 19–27% and reduced progression to active tuberculosis by 71%. The studies included in this review were limited to those that used interferon gamma release assay. The duration of protection of BCG is not clearly known. In those studies showing a protective effect, the data are inconsistent.
Construction materials The chambers are generally built of brick masonry, or hollow cement-concrete slabs. Sheet metal or prefabricated aluminium in a double-walled construction with sandwiched thermal insulation, such as glass wool or polyurethane foams, are materials that are also used in some modern timber ovens. However, brick masonry chambers, with lime and (mortar) plaster on the inside and painted with impermeable coatings, are used widely and have been found to be satisfactory for many applications. Heating Heating is usually carried out by steam heat exchangers and pipes of various configurations (e.g. plain, or finned (transverse or longitudinal) tubes) or by large flue pipes through which hot gases from a wood-burning furnace are passed. Only occasionally is electricity or gas employed for heating. Humidification Humidification is commonly accomplished by introducing live steam into the kiln through a steam spray pipe. In order to limit and control the humidity of the air when large quantities of moisture are being rapidly evaporated from the timber, there is normally a provision for ventilation of the chamber in all types of kilns. Air circulation Air circulation is the means for carrying the heat to and the moisture away from all parts of a load. Forced circulation kilns are most common, where the air is circulated by means of fans or blowers, which may be installed outside the kiln chamber (external fan kiln) or inside it (internal fan kiln).
Sources: en.wikipedia.org
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.
No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.
No regulatory agency has approved cardarine as a medicine. It was investigated in early research but development was discontinued. It is not available as a prescription drug.
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.