A practical reference on WADA Prohibited List: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-08-01 and is reviewed periodically as new material appears.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| WADA classification | S4 Hormone and Metabolic Modulators | Prohibited at all times in sport. |
| Drug approval status | Not approved in major jurisdictions | No accepted therapeutic indication. |
| Common detection method | LC-MS/MS | Detects parent compound and metabolites. |
| Typical test matrix | Urine or blood | Urine is common in anti-doping testing. |
| Product labeling | Research chemical or supplement | Often not independently verified. |
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.
Regulatory treatment varies, but cardarine is not approved as a medicine. Sports authorities list GW501516 as a prohibited substance, and it is banned at all times under the World Anti-Doping Agency code. Many countries restrict sales for human consumption, while online vendors market it as a research chemical. Such products may lack purity data, and their actual contents can differ from the label. Purchasing or possessing cardarine may carry legal consequences depending on jurisdiction. The compound is not a dietary supplement ingredient in regulated markets.
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.
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.
Quality assessment for cardarine samples usually combines identity, purity, and impurity testing. Nuclear magnetic resonance spectroscopy and mass spectrometry can confirm molecular structure, while high-performance liquid chromatography estimates purity. Certificates of analysis from testing laboratories may list these results, but they do not establish safety or legality. In the absence of approved manufacturing, products sold online may contain the wrong compound, variable amounts, or unlisted contaminants. Independent verification is therefore central to analytical work and to interpreting any reported biological activity.
Laboratory detection of GW501516 commonly uses liquid chromatography coupled with tandem mass spectrometry. The method can identify the parent compound or its metabolites in urine and blood after sample cleanup. Protein precipitation, solid-phase extraction, or enzymatic hydrolysis may precede analysis, depending on the matrix. Reference standards are required for accurate quantification and confirmation. Because the compound is not approved, testing often occurs in anti-doping, forensic, or research settings rather than routine clinical care. Results are reported with limits of detection and quantification.
Stability of GW501516 depends on form, temperature, light exposure, and moisture. Solid reference material is typically stored frozen or refrigerated in a desiccator and protected from light. Solutions in organic solvents such as dimethyl sulfoxide are often kept frozen in aliquots to reduce freeze-thaw cycling. Aqueous solubility is low, so aqueous stock solutions can be difficult to prepare without cosolvents. Degradation may appear as changes in chromatographic purity or mass spectral signal. Stability studies are needed to establish shelf life for any specific preparation.
Laboratory detection of cardarine typically involves sample preparation followed by chromatographic separation and mass spectrometric identification. Urine is the most common matrix for anti-doping tests, though blood and hair have also been explored. Methods can target the parent compound or its metabolites, depending on the expected window of detection. Reference standards are required for accurate quantification. Matrix effects and dilution can influence results, so laboratories use internal standards and validation protocols. The exact detection window varies with dose, route, and individual metabolism.
A common misconception is that cardarine has been proven safe for human use. In reality, human clinical data are limited, and long-term animal studies have raised concerns about cancer. Another misconception is that it is a supplement or vitamin-like compound. It is a synthetic research chemical with no approved medical indication. Scientific discussion often focuses on its mechanism and detection rather than therapeutic use. Regulatory and anti-doping literature treats it primarily as a prohibited substance.
Cardarine is explicitly prohibited by the World Anti-Doping Agency under the class of PPARδ agonists. Its presence in urine or blood samples can be detected using mass spectrometry-based methods, often liquid chromatography-tandem mass spectrometry. Athletes who test positive may face sanctions, including bans from competition. The compound is also regulated as a prescription-only or unapproved drug in many countries. Enforcement varies by jurisdiction, and some regions treat it as a controlled substance. Online sales may occur despite these restrictions, creating quality and legal risks.
=== Food constituents === Resistant starch from high-amylose corn, amylomaize, has been shown to reduce insulin resistance in healthy individuals, in individuals with insulin resistance, and in individuals with type 2 diabetes. Some types of polyunsaturated fatty acids (omega-3) may moderate the progression of insulin resistance into type 2 diabetes, however, omega-3 fatty acids appear to have limited ability to reverse insulin resistance, and they cease to be efficacious once type 2 diabetes is established.
In 1210, all Jewish householders in England were imprisoned in Bristol and a hefty levy of 60,000 or 66,000 marks was imposed on them. During the Second Barons' War, the city's archa was burned and the Jewish community was violently attacked. There was another attack in 1275, but without fatalities. The community was expelled with the rest of England's Jews in 1290. There is a surviving Jewish ritual bath, from this time period now known as Jacob's Well. First interpreted as a mikveh, this was subsequently re-evaluated as a Bet Tohorah, associated with the nearby Jewish cemetery at Jews Acre.
== Causes == It can occur in patients with severely compromised intestinal function, those undergoing total parenteral nutrition, those who have had gastrointestinal bypass surgery, and also in persons of advanced age (i.e., over 90). People dependent on food grown from selenium-deficient soil may be at risk for deficiency. Increased risk for developing various diseases has also been noted, even when certain individuals lack optimal amounts of selenium, but not enough to be classified as deficient. For some time now, it has been reported in the medical literature that a pattern of side effects possibly associated with cholesterol-lowering drugs (e.g., statins) may resemble the pathology of selenium deficiency.
Higher concentrations can increase exchange rates but may also lead to faster resin saturation and lower selectivity, especially in the presence of competing ions. Divalent and trivalent ions generally exhibit stronger binding to the resin compared to monovalent ions. Flow rate and contact time are critical in continuous systems. If the liquid passes through the resin too quickly, the ions may not have sufficient time to diffuse into the resin structure, resulting in incomplete exchange. Optimizing flow conditions ensures more efficient resin utilization. Fouling and contamination are common challenges in long-term operation. Organic matter, metal oxides, microbial growth, or suspended solids can obstruct the resin matrix and reduce the availability of exchange sites. Preventive measures, such as pre-filtration, regular cleaning, and resin regeneration, help maintain performance and prolong service life. Regeneration and the lifecycle of the best-operated resin eventually exhausts. Thermal reactivation (steam or hot caustic at 120–150 °C) and chemical regeneration (acid/base washes) restore capacity, but each cycle erodes ~0.5–2 % of exchange sites leading to the need of replacement as time goes on. This makes tracking cycle count and capacity loss per cycle important as it informs operators of the need for scheduled resin replacement before contaminant leakage occurs.
concentration The quantity or abundance of a constituent of a mixture per unit quantity of that mixture; e.g. the amount, in moles, of a dissolved solute per unit volume of a solution, a measure known as molar concentration or molarity. Several different definitions of concentration are widely used in chemistry, including molar concentration, mass concentration, and volume concentration.
Sources: en.wikipedia.org
Chaplain, University of Sunderland. For services to Higher Education. Dr Catherine Marian Hubbert. Macmillan General Practitioner and Founder, Woodlands Hospice Charitable Trust. For services to Palliative Care. Antony Jasper Hudgell. Co-Founder, Tony Hudgell Foundation. For services to the Prevention of Child Abuse. Karen Humphries. Assessor and Duke of Edinburgh Award Manager, Nunnery Wood High School, Worcester. For services to Young People. Graham Walter Hundley. Emergency Response Volunteer, Cumbria. For voluntary service to the British Red Cross. Elaine Hutchings. For services to the community in Lichfield, Staffordshire during Covid-19. Lena Moira Hutchinson. For voluntary services to the community in Larne, County Antrim. William David Hutton. Founder, Campsie Accordion and Fiddle Club. For services to Music and to the community in Dunbartonshire. Robert Alan John Illman. For services to Mountain Rescue in Dartmoor, Devon. Richard Stansfield Isaac. Community and Sustainability Manager, Northern Trains. For services to Inclusion in the Rail Industry. Clive Herbert Jackson. For services to the community in York. Christopher Angus Jamieson. Special Inspector, British Transport Police (Scotland). For services to Policing. Patricia Carol Jarman. For services to the community in Stalybridge, Metropolitan Borough of Tameside. Michael George Jaynes. Akela, 1st Hatherley Scouts, Cheltenham. For services to Young People and to the community in Cheltenham, Gloucestershire. Hilary Mary Jenkins. For services to the community in Wiltshire, particularly during Covid-19.
==== Using difference between detrital zircons crystallisation ages and their corresponding maximum depositional age ==== Apart from the detrital zircon age abundance, difference between detrital zircons crystallisation ages (CA) and their corresponding maximum depositional age (DA) can be plotted in cumulative distribution function to correlate particular tectonic regime in the past. The effect of different tectonic settings on the difference between CA and DA is illustrated in Figure 7 and summarized in Table. 3.
Mostly in the 1990s, several books were published that were critical of cold fusion research methods and the conduct of cold fusion researchers. Over the years, several books have appeared that defended them. Around 1998, the University of Utah had already dropped its research after spending over $1 million, and in the summer of 1997, Japan cut off research and closed its own lab after spending $20 million.
=== Political statements === Darbar includes two scenes in which characters speak of prison inmates being allowed to go out and shop. The dialogues in either scene are not spoken by Rajinikanth but he is present in the scenes. Lyca Productions announced it would be removing controversial dialogue from the film, which was deemed to be a reference to V. K. Sasikala, the jailed associate of former chief minister J. Jayalalithaa. Lyca Productions released a statement on Twitter saying these scenes were included with the intention of entertaining audiences and do not refer to any individual.
The subject was said to have “agrypnia excitata”, which consists of severe total insomnia of long duration associated with decreased vigilance, mental confusion, hallucinations, motor agitation, and complex motor behavior mimicking dreams, and autonomic activation. CNS and autonomic symptoms were caused by impaired corticolimbic control of the subcortical structures regulating the sleep-wake and autonomic functions.
Sources: en.wikipedia.org
== External links == International Chemical Safety Card 0457 NIOSH Pocket Guide to Chemical Hazards. "#0226". National Institute for Occupational Safety and Health (NIOSH). Concise International Chemical Assessment Document 31: N,N-Dimethylformamide
Pharmacokinetic analysis has largely taken place in live rodents as well as in rodent and human microsomes. Owing to the heterogeneity of analysis and paucity of human experiments conducted thus far, the pharmacokinetic profile of mitragynine is not complete. However, initial pharmacokinetic studies in humans have yielded preliminary information. In a study of 10 healthy volunteers taking orally administered mitragynine from whole leaf preparations, mitragynine appeared to have a much longer half-life than typical opioid agonists (7–39 hours) and reached peak plasma concentration (Tmax) within 1 hour of administration. However, another study involving a Kratom tea preparation reported a much shorter half-life of 3 hours. Mitragynine is estimated to have a bioavailability of 21%.
== Release == The first two episodes were released on the Angel streaming platform alongside the theatrical debut of the film. After the rest of season 1 was completed, episode 3 was released on November 26, 2025, with weekly releases thereafter concluding with the season finale on December 25, 2025. As of November 2025, prior to the release of the remainder of season 1, the Homestead film and series had been watched on the Angel app for more than 81 million minutes, and Angel Studios said over a quarter million people had subscribed to the platform to watch the show.
=== Developmental factors === Various developmental factors may affect rates of obesity. Breastfeeding, for example, may protect against obesity in later life with the duration of breastfeeding inversely associated with the risk of being overweight later on. A child's body growth pattern may influence the tendency to gain weight. Researchers measured the standard deviation (SD [weight and length]) scores in a cohort study of 848 babies. They found that infants who had an SD score above 0.67 had catch up growth (they were less likely to be overweight) compared to infants who had less than a 0.67 SD score (they were more likely to gain weight). Additionally, breastfeeding for less than six months, compared to six months or more, has been shown to result in a higher growth rate and higher BMI at 18, 36, and 72 months of age. A child's weight may be influenced when he/she is only an infant. Researchers also did a cohort study on 19,397 babies from their birth until age seven and discovered that high-weight babies at four months were 1.38 times more likely to be overweight at seven years old compared to normal-weight babies. High-weight babies at the age of one were 1.17 times more likely to be overweight at age seven compared to normal-weight babies.
Scheele sourced uric acid from human calculi (such as kidney stones) and called the compound lithic acid. William Prout investigated the compound in 1818, and he used boa constrictor excrement with up to 90% ammonium acid urate. In the chapter "Nitrogen" of his memoir The Periodic Table, Primo Levi tells of his futile attempt to make alloxan for a cosmetics manufacturer who has read that it can cause permanent reddening of the lips. Levi considers the droppings of pythons as a source for uric acid for making alloxan, but he is turned down by the director of the Turin zoo because the zoo already has lucrative contracts with pharmaceutical companies, so he is obliged to use chickens as his source of uric acid. The synthesis fails, however, "and the alloxan and its resonant name remained a resonant name."
Sources: en.wikipedia.org
Anti-doping laboratories typically use LC-MS/MS to detect GW501516 and its metabolites in urine. The method is sensitive and can identify the compound at low concentrations. Detection depends on sample timing, metabolism, and the specific assay.
Legality varies by country and context. It lacks marketing approval as a medicine in major countries. Sports organizations prohibit its use at all times.
A certificate of analysis may report identity, purity, and testing methods for a specific batch. It does not guarantee safety or legal status. Independent verification can confirm whether the material matches the label.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.