Everything below concerns LC-MS/MS. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-04-15. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Prohibited in sport | Listed by WADA as a PPARδ agonist. |
| Typical detection matrix | Urine | Most common sample for anti-doping analysis. |
| Common analytical method | LC-MS/MS | Liquid chromatography-tandem mass spectrometry. |
| Common synonyms | GW501516, GSK-516, endurobol | Names found in research and fitness contexts. |
| Typical detection window | Variable | Depends on dose, route, and individual metabolism. |
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 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.
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.
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.
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.
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.
While not always able to avoid contact with the escorts, the threat of mass attacks and later the "company front" (eight abreast) assaults by armored Sturmgruppe Fw 190As brought an urgency to attacking the Luftwaffe wherever it could be found, either in the air or on the ground. Beginning in late February 1944, 8th Air Force fighter units began systematic strafing attacks on German airfields with increasing frequency and intensity, with the objective of gaining air supremacy over the Normandy battlefield. In general, these were conducted by units returning from escort missions, but beginning in March, many groups also were assigned airfield attacks instead of bomber support. The P-51, particularly with the advent of the K-14 gyro gunsight and the development of "Clobber Colleges" for the training of fighter pilots in late 1944, was a decisive element in Allied countermeasures against the Jagdverbände. The numerical superiority of the USAAF fighters, superb flying characteristics of the P-51, and pilot proficiency helped cripple the Luftwaffe's fighter force. As a result, the fighter threat to the US, and later British, bombers was greatly diminished by July 1944. The RAF, long proponents of night bombing for protection, were able to reopen daylight bombing in 1944 as a result of the crippling of the Luftwaffe fighter arm. Reichsmarschall Hermann Göring, commander of the Luftwaffe during the war, was quoted as saying, "When I saw Mustangs over Berlin, I knew the jig was up."
In the classical pathway, C1 complex recognizes two IgGs or one pentamer IgM, forming an antigen-antibody complex. For the lectin pathway, mannose-binding lectin (MBL) and their associated serine proteins (MASPs), recognize carbohydrates on pathogens, which initiates the C3 convertase C4b2b. The alternative pathway is different due to its spontaneous activation in fluid phase by hydrolysis of C3 to C3(H2O). C3(H2O) can bind to Factor B, which can then be cleaved by the serum protease Factor D, resulting in formation of C3(H2O)Bb. C3(H2O)Bb can cleave additional C3 molecules, creating C3b and C3a.
Bluebottle flies are typically 10–14 mm (3⁄8–9⁄16 in) long, almost twice the size of a housefly. The head and thorax are dull gray, and the back of the head has long yellow-orange setae. The abdomen is bright metallic blue with black markings. Its body and legs are covered with black bristly hairs. It has short, aristate antennae and four tarsi per leg. The eyes are red and the wings are transparent. The legs and antennae are black and pink. The chest is bright purple and has spikes for protection from other flies. To differentiate C. vomitoria from other closely related species such as Calliphora vicina, C. vomitoria can be identified by characteristic "orange cheeks", which are the orange hairs below the eyes. Additionally, C. vomitoria has a dark basicosta (base of the wing) while C. vicina has a yellow basicosta. All these characteristics can be identified through a simple photograph.
Rebellions in the former Cossack territories erupted occasionally during the interwar period. In 1920–1921, disgruntlement with continued Soviet grain-requisitioning activities provoked a series of revolts among Cossack and outlander communities in South Russia. The former Cossack territories of South Russia and the Urals also experienced a devastating famine in 1921–1922. In 1932–1933, another famine, known as the Holodomor, devastated Ukraine and some parts of South Russia, causing a population decline of about 20–30%. While urban areas were less affected, the decline was even higher in the rural areas, populated largely by Cossacks. Robert Conquest estimates the number of famine-related deaths in the Northern Caucasus at about one million. Government officials expropriated grain and other produce from rural Cossack families, leaving them to starve and die. Many families were forced from their homes in the severe winter and froze to death. Mikhail Sholokhov's letters to Joseph Stalin document the conditions and widespread deaths, as do eyewitness accounts. Besides starvation, the collectivization and dekulakization campaigns of the early 1930s threatened Cossacks with deportation to labor camps, or outright execution by Soviet security organs. In April 1936, the Soviet regime began to relax its restrictions on Cossacks, allowing them to serve openly in the Red Army. Two existing cavalry divisions were renamed as Cossack divisions, and three new Cossack cavalry divisions were established.
Sources: en.wikipedia.org
=== Interactions with H3K4me3 and H3K14ac === The isomerization of the peptide bond between histone H3's alanine 15 and proline 16 is affected by the acetylation at K14 and can control the methylation states of K4. K4me3 represses gene transcription and depends upon the Set1 methyltransferase complex subunit Spp1 being balanced with the Jhd2 demethylases for proper function. Acetylation of K14 allows for a state change in P16 and primarily promotes the trans state of P16. This trans isomer of P16 reduces K4 methylation, which results in transcription repression. Isomerization of P16 has downstream effects of controlling protein binding to acetylated K18. When P16 is in the trans conformation, Spt7 is allowed to bind to K18ac, increasing transcription.
=== Branding === In 1996, while renovating the first Raising Cane’s location near LSU, Graves uncovered an old mural from a former bakery, "Wolf's Bakery", that inspired the restaurant's logo with its red-brick tones, flowing white script, and a yellow tagline declaring "bread at its best". The name "Raising Cane's" pays tribute to his yellow Labrador, Cane. Locations feature custom murals. These brand elements can be seen in official merchandise released by Raising Cane's. In addition, Raising Cane's sells limited-edition merchandise, like the Graduation Plush Puppy released in 2025. They held a fashion show in 2025 at New York Fashion Week, designed by Joe Ando-Hirsh.
As of 2012, at least eight mummified human remains have been recovered from the Douzlakh Salt Mine at Chehr Abad in northwestern Iran. Due to their salt preservation, these bodies are collectively known as Saltmen. Carbon-14 testing conducted in 2008 dated three of the bodies to around 400 BC. Later isotopic research on the other mummies returned similar dates, however, many of these individuals were found to be from a region that is not closely associated with the mine. It was during this time that researchers determined the mine suffered a major collapse, which likely caused the death of the miners. Since there is significant archaeological data that indicates the area was not actively inhabited during this time period, current consensus holds that the accident occurred during a brief period of temporary mining activity.
Sources: en.wikipedia.org
==== Applications in pharmaceutical industry ==== Oral drug delivery: Emulsions may provide an efficient means of administering drugs that are poorly soluble or have low bioavailability or dissolution rates, increasing both dissolution rates and absorption to increase bioavailability and improve bioavailability. By increasing surface area provided by an emulsion, dissolution rates and absorption rates of drugs are increased, improving their bioavailability. Topical formulations: Emulsions are widely utilized as bases for topical drug delivery formulations such as creams, lotions and ointments. Their incorporation allows lipophilic as well as hydrophilic drugs to be mixed together for maximum skin penetration and permeation of active ingredients. Parenteral drug delivery: Emulsions serve as carriers for intravenous or intramuscular administration of drugs, solubilizing lipophilic ones while protecting from degradation and decreasing injection site irritation. Examples include propofol as a widely used anesthetic and lipid-based solutions used for total parenteral nutrition delivery. Ocular Drug Delivery: Emulsions can be used to formulate eye drops and other ocular drug delivery systems, increasing drug retention time in the eye and permeating through corneal barriers more easily while providing sustained release of active ingredients and thus increasing therapeutic efficacy.
electric sector without an initial drift length followed by a 60° magnetic sector with the same direction of curvature. Sometimes called a "Bainbridge mass spectrometer," this configuration is often used to determine isotopic masses. A beam of positive particles is produced from the isotope under study. The beam is subject to the combined action of perpendicular electric and magnetic fields. Since the forces due to these two fields are equal and opposite when the particles have a velocity given by
=== Pharmacodynamics === Carisoprodol's structural similarity to meprobamate indicates GABAergic activity, including GABAA agonism, similar to the mechanism of benzodiazepines but distinct (benzodiazepines are positive allosteric modulators of the GABA A receptor, and have no direct agonist activity but rather increase the potency of the endogenous agonist GABA at this receptor). Carisoprodol thus not only works as a muscle relaxant but also helps with anxiety. Unlike benzodiazepines, carisoprodol does not treat or prevent seizures. In fact, it increases the risk of seizures, with the risk being even higher when discontinuing the drug after long-term use, especially if it is stopped suddenly, precipitating withdrawal.
Sources: en.wikipedia.org
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.
Detection usually uses liquid chromatography-tandem mass spectrometry after sample cleanup. Laboratories look for the parent compound or metabolites. The method requires validated reference standards and controls.
Legality varies by country. In many places it is an unapproved drug and cannot be legally sold for human consumption. Purchasing from online vendors carries legal and quality risks.
No. Cardarine is GW501516, a PPARδ agonist, while SARMs act on androgen receptors. The two classes are often grouped in informal discussions despite different mechanisms.