Everything below concerns Anti-doping testing. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-07-05. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
| 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. |
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 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.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
== Biosynthesis == Both ginger (Zingiber officinale) and turmeric (Curcuma longa) had been suspected to utilize phenylpropanoid pathway and produce putative type III polyketide synthase products based on the research of 6-gingerol biosynthesis by Denniff and Whiting in 1976 and by Schröder's research in 1997. 6-Gingerol is the major gingerol in ginger rhizomes and it possesses some interesting pharmacological activities like analgesic effect. While the biosynthesis of 6-gingerol is not fully elucidated, plausible pathways are presented here.
At 2:40 pm on September 11, Secretary of Defense Donald Rumsfeld was issuing orders to his aides to look for evidence of Iraqi involvement. According to notes taken by senior policy official Stephen Cambone, Rumsfeld asked for, "Best info fast. Judge whether they are good enough to hit S.H. at the same time. Not only OBL." Hours after the attacks, New York Governor George Pataki mobilized elements of the New York National Guard and ordered them to lower Manhattan. By nightfall, soldiers from the 42nd Infantry Division arrived at the WTC site and established a security perimeter around the piles of rubble that had once been the WTC complex. The 42nd Division later assumed command of the New York National Guard joint task force for response and recovery in lower Manhattan. The District of Columbia Air National Guard's 113th Wing at Andrews Air Force Base was not part of the North American Aerospace Defense Command (NORAD) network tasked with domestic airspace monitoring. Following a direct inquiry to the Secret Service regarding airspace restrictions, the Secret Service bypassed the standard military chain of command to request an immediate fighter scramble from the White House. Lt. Col. Marc Sasseville and 1st Lt. Heather Penney scrambled their F-16s without ammunition or live missiles, operating under ad-hoc orders to protect the capital using whatever force necessary—including intentional mid-air ramming maneuvers if United Airlines Flight 93 threatened the U.S. Capitol or White House.
=== Investment costs === Investment costs for multipurpose plants are high in comparison with product output. However, they vary considerably, depending on the location, size of equipment and degree of sophistication (e.g., automation, containment, quality of equipment, complexity of infrastructure). An example for a cGMP multipurpose plant built in the US is shown in Table 9. The investment cost of $21 million comprises just the equipment and installation. The building, property and external services are excluded. For comparison purposes, the investment cost per m3 reactor volume is used. In this case, it is $0.9 million. The amount includes the cost of the reaction vessel itself plus an equitable part of the ancillary equipment, like feeding tanks, piping, pumps & process control. If larger or smaller reactors were installed, the unit cost per m3 would decrease or decrease with the exponent 0.5, respectively. Hence, by increasing the equipment size, manufacturing costs on a per kilogram (kg−1) basis typically decrease substantially. Costs for a plant that is used for the production of only non regulated intermediates would be substantially lower. Pharma companies tend to spend up to ten times more for a plant with the same capacity. In contrast, investment costs in developing countries, particularly in India or China, are considerably lower.
== Medical uses == Etoperidone was used or was intended for use as an antidepressant in the treatment of depression. Etoperidone might be useful as a hallucinogen antidote or "trip killer" in blocking the effects of serotonergic psychedelics like psilocybin and lysergic acid diethylamide (LSD).
== History == The benefit and side effects of loncastuximab tesirine were evaluated in one clinical trial, ADCT-402-201 (LOTIS-2 / NCT03589469), that included 145 participants with relapsed or refractory diffuse large B-cell lymphoma after at least two prior treatments that did not work or were no longer working. Participants received loncastuximab tesirine 0.15 mg/kg every 3 weeks for 2 treatment cycles, then 0.075 mg/kg every 3 weeks for subsequent treatment cycles. Loncastuximab tesirine treatment was continued until either disease worsened or participants experienced unacceptable side effects (toxicity). The benefit of loncastuximab tesirine was evaluated by measuring how many participants had complete or partial tumor shrinkage (response) and by how long that response lasted. Participants in the clinical trial were also evaluated for side effects for the purpose of this drug application. Trials were conducted at 28 sites in the United States, the United Kingdom, Italy, and Switzerland. Loncastuximab tesirine was granted orphan drug designation by the FDA for the treatment of diffuse large B-cell lymphoma. Loncastuximab tesirine was approved under FDA's accelerated approval program.
Sources: en.wikipedia.org
=== National AI Strategy (2021) === The UK Government's National AI Strategy, was published in September 2021 under the Conservative government of Boris Johnson. It set out a ten-year plan structured around three pillars: investing in the long-term needs of the AI ecosystem; supporting the adoption of AI across all sectors of the economy; and establishing an effective governance framework that ensures AI is safe, ethical, and trustworthy. The strategy identified the UK's world-class universities, research base, and existing technology cluster as competitive advantages to be leveraged.
Clinical psychology in Britain developed much like in the US after WWII, specifically within the context of the National Health Service with qualifications, standards, and salaries managed by the British Psychological Society.
=== Background === Proteins or polypeptides are polymers of amino acids. A protein is created by ribosomes that "read" RNA that is encoded by codons in the gene and assemble the requisite amino acid combination from the genetic instruction, in a process known as translation. The newly created protein strand then undergoes posttranslational modification, in which additional atoms or molecules are added, for example copper, zinc, or iron. Once this post-translational modification process has been completed, the protein begins to fold (sometimes spontaneously and sometimes with enzymatic assistance), curling up on itself so that hydrophobic elements of the protein are buried deep inside the structure and hydrophilic elements end up on the outside. The final shape of a protein determines how it interacts with its environment. Protein folding consists of a balance between a substantial amount of weak intra-molecular interactions within a protein (Hydrophobic, electrostatic, and Van Der Waals Interactions) and protein-solvent interactions. As a result, this process is heavily reliant on environmental state that the protein resides in. These environmental conditions include, and are not limited to, temperature, salinity, pressure, and the solvents that happen to be involved. Consequently, any exposure to extreme stresses (e.g. heat or radiation, high inorganic salt concentrations, strong acids and bases) can disrupt a protein's interaction and inevitably lead to denaturation.
The Medical Companion, Or Family Physician, a book from 1827, gave the following recipe: Paregoric Elixir – Take of purified opium, flowers of Benzoin, camphor, and essential oil of annis-seed, each, two drachms; brandy, two pints. Digest for eight or ten days, frequently shaking the bottle, and then strain the elixir.
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. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.