WADA Prohibited List raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2025-09-22 and is reviewed periodically as new material appears.
Cardarine is the common name for GW501516, a synthetic compound studied as a peroxisome proliferator-activated receptor delta agonist. Researchers developed it to explore treatments for lipid disorders and metabolic conditions. It is not an approved medicine in any country. Early clinical work examined changes in HDL cholesterol and triglycerides, but development was discontinued after animal studies raised concerns about cancer. The compound remains available as a research chemical and appears in discussions of performance enhancement.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Also called GW501516 and endurobol. |
| Chemical formula | C21H18F3NO3S2 | Molecular weight about 453.5 g/mol. |
| Appearance | White to off-white solid | Form depends on synthesis and purity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, protected from light | Common for research chemicals. |
GW501516 acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in transcription of genes related to lipid handling and energy use. Activation of PPARδ can shift skeletal muscle toward greater fatty acid oxidation in animal models, which is one reason it drew interest for metabolic disease and exercise research. The exact downstream effects depend on tissue, species, dose, and duration. Human data are sparse, so many proposed benefits remain hypotheses rather than established clinical outcomes.
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 can be detected in biological samples and product materials using liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS). The method separates compounds by chromatography and identifies them by mass-to-charge transitions, allowing low-level detection in urine or blood. Sample preparation often involves enzymatic hydrolysis, solid-phase extraction, or protein precipitation. Certified reference materials and isotope-labeled internal standards improve quantification. Detection windows depend on metabolism, matrix, and assay sensitivity, so no single universal window applies.
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.
Art to be viewed from space – The Nazca Lines were created by the ancient Nazca culture in modern-day Peru. The Nazca built these artworks, which could only be viewed from the sky or from space. It was as if the Nazca were building monuments, which only their gods could view from up in the sky. Some of these artworks, otherwise known as the Nazca Lines, could only be viewed from the sky and each one of these works of Nazca art spans several miles across in size and dimension in the Sechura Desert. Aqueducts – The ancient Andean cultures, such as Chimu, Moche and Nazca, lived in dry environments, yet they sustained large scale agriculture consisting of a wide variety of crops by employing aqueducts connecting various freshwater sources, such as mountain streams and lakes to their agricultural fields which were sometimes injecting pressure with the aid of puquios (wind-based water pumps). The Inca later expanded on these previously constructed aqueducts and built a more complex and large aqueduct system in the Inca Empire. The Mesoamerican Aztecs also constructed complex, dual-pipe aqueducts to supply their vast city of Tenochtitlan. Aspirin – Indigenous Americans have been using willow tree bark for thousands of years to reduce fever and pain as were the peoples of Assyria, Sumer, Ancient Egypt and Ancient Greece. When chemists analyzed willows in the last century, they discovered salicylic acid; the basis of the modern drug aspirin.
Threshold for diagnosis of diabetes is based on the relationship between results of glucose tolerance tests, fasting glucose or HbA1c and complications such as retinal problems. A fasting or random blood sugar is preferred over the glucose tolerance test, as they are more convenient for people. HbA1c has the advantages that fasting is not required and results are more stable but has the disadvantage that the test is more costly than measurement of blood glucose. It is estimated that 20% of people with diabetes in the United States do not realize that they have the disease. Type 2 diabetes is characterized by high blood glucose in the context of insulin resistance and relative insulin deficiency. This is in contrast to type 1 diabetes in which there is an absolute insulin deficiency due to destruction of islet cells in the pancreas and gestational diabetes that is a new onset of high blood sugars associated with pregnancy. Type 1 and type 2 diabetes can typically be distinguished based on the presenting circumstances. If the diagnosis is in doubt antibody testing may be useful to confirm type 1 diabetes and C-peptide levels may be useful to confirm type 2 diabetes, with C-peptide levels normal or high in type 2 diabetes, but low in type 1 diabetes.
The pharyngeal jaws of teleosts, a second set of jaws contained within the throat, are composed of five branchial arches, loops of bone which support the gills. The first three arches include a single basibranchial surrounded by two hypobranchials, ceratobranchials, epibranchials and pharyngobranchials. The median basibranchial is covered by a toothplate. The fourth arch is composed of pairs of ceratobranchials and epibranchials, and sometimes additionally, some pharyngobranchials and a basibranchial. The base of the lower pharyngeal jaws is formed by the fifth ceratobranchials while the second, third and fourth pharyngobranchials create the base of the upper. In the more basal teleosts the pharyngeal jaws consist of well-separated thin parts that attach to the neurocranium, pectoral girdle, and hyoid bar. Their function is limited to merely transporting food, and they rely mostly on lower pharyngeal jaw activity. In more derived teleosts the jaws are more powerful, with left and right ceratobranchials fusing to become one lower jaw; the pharyngobranchials fuse to create a large upper jaw that articulates with the neurocranium. They have also developed a muscle that allows the pharyngeal jaws to have a role in grinding food in addition to transporting it. The caudal fin is homocercal, meaning the upper and lower lobes are about equal in size.
=== Sports === Outback Steakhouse was the title sponsor of the Outback Champions Series tennis events and NCAA football's Outback Bowl. The sponsorship lasted through 2020. Outback is also a partner of the Tampa Bay Lightning and has a concession stand in Amalie Arena.
Sources: en.wikipedia.org
In the autumn of that year, she began studying for a PhD at Newnham College, Cambridge, under the supervision of John Desmond Bernal. It was then that she became aware of the potential of X-ray crystallography to determine the structure of proteins. She was working with Bernal on the technique's first application to the analysis of a biological substance, pepsin. The pepsin experiment is largely credited to Hodgkin, however she always made it clear that it was Bernal who initially took the photographs and gave her additional key insights. Her PhD was awarded in 1937 for research on X-ray crystallography and the chemistry of sterols.
== Definition == As a concept, anarchy is commonly defined by what it excludes. Etymologically, anarchy is derived from the Greek: αναρχία, romanized: anarchia; where the prefix "αν" ("an") means "without" and the suffix "αρχία" ("archia") derives from "ruler" or "leader". Therefore, anarchy is fundamentally defined by the absence of rulers, leaders, or sovereigns. While anarchy specifically represents a society without rulers, it can more generally refer to a stateless society, or a society without government. Anarchy is thus defined in direct contrast to the State, an institution that claims a monopoly on violence over a given territory. Anarchists such as Errico Malatesta have also defined anarchy more precisely as a society without authority, or hierarchy. Anarchy is often defined synonymously as chaos or social disorder, reflecting the state of nature as depicted by Thomas Hobbes. By this definition, anarchy represents not only an absence of government but also an absence of governance. This connection of anarchy with chaos usually assumes that, without government, no means of governance exist and thus that disorder is an unavoidable outcome of anarchy. Sociologist Francis Dupuis-Déri has described chaos as a "degenerate form of anarchy", in which there is an absence, not just of rulers, but of any kind of political organization. He contrasts the "rule of all" under anarchy, which he considers to involve a process of consensus decision-making and self-governance, with the "rule of none" under chaos.
Spontaneous and unpredictable pain at any time, and specific causal factors cannot be identified Patient may complain of sharp lingering pains that last longer than 30 seconds, even after removal of stimulus Possible referred pain Pain may increase with changes of posture, e.g. from lying down to standing. Analgesics tend to be ineffective. No pain on percussion because the bacteria are not present in the peri-apical region. Key characteristics of asymptomatic irreversible pulpitis include:
Sources: en.wikipedia.org
Fourteen isotopes of lawrencium are known, with mass number 251–262, 264, and 266; all are radioactive. Seven nuclear isomers are known. The longest-lived isotope, 266Lr, has a half-life of about ten hours and is one of the longest-lived superheavy isotopes known. However, shorter-lived isotopes are usually used in chemical experiments because 266Lr can only be produced as a final decay product of even heavier and harder-to-make elements: it was discovered in 2014 in the decay chain of 294Ts. 256Lr (half-life 27 seconds) was used in the first chemical studies on lawrencium: the longer-lived 260Lr (half-life 2.7 minutes) is usually used for this purpose. After 266Lr, the longest-lived isotopes are 264Lr (4.8+2.2−1.3 h), 262Lr (3.6 h), and 261Lr (44 min). All other known lawrencium isotopes have half-lives under 5 minutes, and the shortest-lived of them (251Lr) has a half-life of 24.4 milliseconds. The half-lives of lawrencium isotopes mostly increase smoothly from 251Lr to 266Lr, with a dip from 257Lr to 259Lr.
== Legal status == As of May 2013, Boehringer and Lilly had submitted applications for marketing approval to the European Medicines Agency (EMA) and the US Food and Drug Administration (FDA). Empagliflozin was approved in the European Union in May 2014, and was approved in the United States in August 2014. The FDA required four postmarketing studies: a cardiovascular outcomes trial, two studies in children, and a toxicity study in animals related to the pediatric trials. After the patent expired in 2025, about 37 companies began producing generic empagliflozin in India.
This could provide a pathway from fatty acids to glucose, but whether this actually happens in the human body is controversial. Although most gluconeogenesis occurs in the liver, the relative contribution of gluconeogenesis by the kidney is increased in diabetes and prolonged fasting. The gluconeogenesis pathway is highly endergonic until it is coupled to the hydrolysis of ATP or GTP, effectively making the process exergonic. For example, the pathway leading from pyruvate to glucose-6-phosphate requires 4 molecules of ATP and 2 molecules of GTP to proceed spontaneously. These ATPs are supplied from fatty acid catabolism via beta oxidation.
Sources: en.wikipedia.org
Cardarine is a common name for the investigational compound GW501516. It acts as a PPARδ agonist and is not approved for human use. It is prohibited in sport.
It activates PPARδ, a nuclear receptor that influences gene expression related to lipid and energy metabolism. Animal studies show changes in endurance and lipid levels. Human effects and risks are not well established.
No, cardarine is not a steroid. It belongs to a different chemical class, the PPARδ agonists. It is also not a selective androgen receptor modulator.
Rodent studies reported increased endurance and fat oxidation after GW501516 exposure. Long-term studies also found higher rates of some tumors, which led to halted development.