Everything below concerns WADA. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| 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 selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
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.
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
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.
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.
The quality of gamma-camera PET imaging is lower, and the scans take longer to acquire. Alternative methods of medical imaging include single-photon emission computed tomography (SPECT), computed tomography (CT), magnetic resonance imaging (MRI) and functional magnetic resonance imaging (fMRI), and ultrasound. SPECT is an imaging technique similar to PET that uses radioligands to detect molecules in the body.
The highest approval rating for the government was in the Northeast (65%), among people with up to a completed elementary education (60%), those earning two minimum wages (59%), and among women (59%). In a survey conducted by PoderData between 24 and 26 September with 2,500 people, a margin of error of 2 percentage points, and a confidence level of 95%, the government obtained 48% approval and 45% disapproval. The regions that most approve of the Lula government are the Southeast and the Northeast, and his government is more approved among younger and older poor and middle-class women. Lula as a person received 36% of mentions as excellent or good, 25% as regular, and 35% as bad or terrible. The survey also asked whether respondents liked Lula's administration more than Bolsonaro's. Forty-eight percent agreed with the statement, 40% disagreed, and 9% said there was no difference. Among evangelicals, government approval fell by two percentage points to 32%, and rejection rose to 64%. Among Catholics, approval fell by 3 percentage points to 57%, and disapproval rose to 36%. In a survey released by Paraná Pesquisas on 13 January 2025, it was revealed that the negative evaluation of President Luiz Inácio Lula da Silva's government exceeded the positive one. According to the survey data, 11.1% of Brazilians considered the government excellent and 22.7% classified it as good, totaling 33.8% positive evaluation. On the other hand, 42.6% of respondents evaluated the government as bad (8.4%) or terrible (34.2%).
==== Other drugs ==== Acamprosate (Alcomed; Aotal; calcium acetylhomotaurinate; Campral; Campral EC; NS-11; Regtect; Sobriol; Zulex) – various actions – alcoholism Baclofen (Baclocur) – GABAB receptor agonist – alcoholism Calcium carbimide (Temposil) – aldehyde dehydrogenase 2 (ALDH2) inhibitor – alcoholism Cyanamide – aldehyde dehydrogenase 2 (ALDH2) inhibitor – alcoholism Disulfiram (Antabuse, Antabus) – aldehyde dehydrogenase 2 (ALDH2) inhibitor – alcoholism Flumazenil (flumazepil; Anexate) – GABAA receptor negative allosteric modulator/benzodiazepine antidote – benzodiazepine overdose Lofexidine (BA-168; BritLofex; Lucemyra; MDL-14042; MDL-14042A; RMI-14042A) – α2-adrenergic receptor agonist – opioid-related disorders Sodium oxybate (Alcover; SMO immediate release formulation) – GABAB and GHB receptor agonist – alcoholism
Sources: en.wikipedia.org
=== Protein purification === Polyhistidine-tags are often used for affinity purification of polyhistidine-tagged recombinant proteins expressed in Escherichia coli or other expression systems. Typically, cells are harvested via centrifugation and the resulting cell pellet lysed either by physical means or by means of detergents and enzymes such as lysozyme or any combination of these. At this stage, the lysate contains the recombinant protein among many endogenous proteins originating from the host cells. The lysate is exposed to affinity resin bound to a carrier matrix coupled with a divalent cation, either by direct addition of resin (batch binding) or by passing over a resin bed in a column format. The resin is then washed with buffer to remove proteins that do not specifically interact with bound cation and the protein of interest is eluted off the resin using buffer containing a high concentration of imidazole or a lowered pH. The purity and amount of protein can be assessed by methods such SDS-PAGE and Western blotting. Affinity purification using a polyhistidine-tag usually results in relatively pure protein. Protein purity can be improved by the addition of a low (20-40 mM) concentration of imidazole to the binding and/or wash buffers. However, depending on the requirements of the downstream application, further purification steps using methods such as ion exchange or size exclusion chromatography may be required. IMAC resins typically retain several prominent endogenous proteins as impurities. In E.
If you were to make it to heaven [...] you had to be interred correctly, for burial was the passage out of this world. The body had to be shrouded in the expectation that it would be reborn into eternal life. Then, on the eve of burial, the corpse had to be taken to church on a torch-lit bier and placed in the darkness of the nave, then laid in front of the high altar, surrounded by candles. The next day, in front of the whole community, a requiem mass was to be sung and the paschal candle lit [...]. Following this, there were prayers, hymns, special masses, and the body was borne to the grave, sprinkled with holy water and buried in consecrated ground. It must be laid head up with its feet to the east, for it was from this direction that Christ would return, from New Jerusalem, at the Apocalypse, when the worthy dead would be resurrected. [...] If burial rituals went awry, one's immortal soul was jeopardised. [...] Personal salvation – breaking free from the corporeal prison and ascending to a spiritual sphere unencumbered by materiality – is the logical culmination of the myth of humanity's supposed dominion over nature. [...].
=== Celebrity protests of business expansion === In 2006, Paul McCartney protested a proposed $175 million animal testing laboratory by the company in Chandler, Arizona. However, the laboratory opened in 2009.
Sources: en.wikipedia.org
Gene Expression Omnibus (GEO) A database of high-throughput functional genomics and gene expression data derived from experimental assays and next-generation sequencing and managed by the National Center for Biotechnology Information.
While orphan drug status is given to drugs with "no reasonable expectation" of profitability, some orphan drugs have gone on to net large profits and/or receive widespread use. The topic of profit in the aftermath of the ODA was addressed in November 2013 in the Seattle Times where the following quote appeared:
To measure hemoglobin manually, the sample is diluted using reagents that destroy red blood cells to release the hemoglobin. Other chemicals are used to convert different types of hemoglobin to one form, allowing it to be easily measured. The solution is then placed in a measuring cuvette and the absorbance is measured at a specific wavelength, which depends on the type of reagent used. A reference standard containing a known amount of hemoglobin is used to determine the relationship between the absorbance and the hemoglobin concentration, allowing the hemoglobin level of the sample to be measured. In rural and economically disadvantaged areas, available testing is limited by access to equipment and personnel. At primary care facilities in these regions, testing may be limited to examination of red cell morphology and manual measurement of hemoglobin, while more complex techniques like manual cell counts and differentials, and sometimes automated cell counts, are performed at district laboratories. Regional and provincial hospitals and academic centres typically have access to automated analyzers. Where laboratory facilities are not available, an estimate of hemoglobin concentration can be obtained by placing a drop of blood on a standardized type of absorbent paper and comparing it to a colour scale.
This spectrometer may consist of magnetic or electric sectors, and so-called velocity selectors, which utilizes both electric fields and magnetic fields. After this stage, no background is left, unless a stable (atomic) isobar forming negative ions exists (e.g. 36S if measuring 36Cl), which is not suppressed at all by the setup described so far. Thanks to the high energy of the ions, these can be separated by methods borrowed from nuclear physics, like degrader foils and gas-filled magnets. Individual ions are finally detected by single-ion counting (with silicon surface-barrier detectors, ionization chambers, and/or time-of-flight telescopes). Thanks to the high energy of the ions, these detectors can provide additional identification of background isobars by nuclear-charge determination.
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.
Yes, WADA prohibits cardarine as a PPARδ agonist. It appears on the prohibited list and can be detected in urine or blood. Athletes using it risk sanctions.