A practical reference on LC-MS/MS: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-07-13 and is reviewed periodically as new material appears.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic PPARδ agonist | Not a steroid or a selective androgen receptor modulator. |
| Common synonyms | Cardarine, GW501516, GW-501516, endurobol | Names vary by supplier and literature source. |
| Appearance | White to off-white powder | Consistent with many small-molecule research chemicals. |
| Solubility | Low in water; soluble in DMSO and ethanol | Often prepared in organic solvent for laboratory work. |
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid and energy metabolism. |
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.
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.
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 first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
Biotechniques Laboratory electrophoresis demonstration, from the University of Utah's Genetic Science Learning Center Discontinuous native protein gel electrophoresis[link removed] Drinking straw electrophoresis How to run a DNA or RNA gel Animation of gel analysis of DNA restriction Step by step photos of running a gel and extracting DNA A typical method from wikiversity
== Uses == PPG is used in many polyurethane formulations. Synthesis of waterborne polymers has been a feature with this substance. As the basic building block is propylene oxide, there are 3 carbons per oxygen on the backbone. This confers some degree of water miscibility though not as good as ethylene oxide-based molecules. It is used to synthesize the epoxy reactive diluent and flexibilizer, Poly(propylene glycol) diglycidyl ether. Another use of PPG is as a surfactant, wetting agent and dispersant in leather finishing. PPG is also employed as a reference and calibrant in mass spectrometry and HPLC. PPG and derivatives may be used as defoamers in drilling and other applications. It is also used as a primary ingredient in the making of paintballs. It has been evaluated as a corrosion inhibitor.
Phytaspase is a member of the plant subtilisin-like protease family, and is commonly distinguished from the other members by its unusual and extremely high specificity towards its substrates, which resembles that of the animal caspases. Similarly to the animal caspases, the phytaspase is a cell death promoting protease.
Environmental noise arises from the surroundings of the analytical instrument. Sources of electromagnetic noise are power lines, radio and television stations, wireless devices, compact fluorescent lamps and electric motors. Many of these noise sources are narrow bandwidth and, therefore, can be avoided. Temperature and vibration isolation may be required for some instruments.
In March 2022, 777 Partners bought 100% of Standard Liège in the Belgian Pro League for €55 million. The fans protested in September 2023 over what they believed to be a lack of investment and ambition. In December 2023, Standard Liège was given an indefinite transfer ban by national authorities for alleged delays in paying taxes, salaries and transfer fees. In May 2024, former Standard owner Bruno Venanzi and the former owners of the club's Stade Maurice Dufrasne demanded the seizure of 777's assets in Belgium over alleged non-payment. Later that month in protest against 777, Standard fans blocked the team bus from leaving the training center before a game against Westerlo, leading to the game being postponed. A court ruled that 777's assets in Belgium could be seized. After 777's soccer clubs passed into ownership of A-CAP, the latter put Standard up for sale in September 2024. In June 2025, the ownership transferred to Giacomo Angelini, alongside a capital increase of €28.7 million.
Sources: en.wikipedia.org
== In cancer research == In Cullen's paper "Granzymes in Cancer and Immunity" he describes the process of "immune surveillance [as] the process whereby precancerous and malignant cells are recognized by the immune system as damaged and are consequently targeted for elimination". For a tumor to progress it requires conditions within the body and surrounding area to be growth-promoting. Almost all people have suitable immune cells to fight off tumors in the body. Studies have shown that the immune system even has the ability to prevent precancerous cells from growing and arbitrate the regression of established tumors. The dangerous thing about cancer cells is they have the ability to inhibit the function of the immune system. Although a tumor may be in its beginning stage and very weak, it may be giving off chemicals that inhibit the function of the immune system allowing it to grow and become harmful. Tests have shown that mice without granzymes and perforins are at high risk to have tumors spread throughout their body. Tumors have the ability to escape from immune surveillance by secreting immunosuppressive TGF-β. This inhibits proliferation and activation of T cells. TGF-β production is the most potent mechanism of immune avoidance used by tumors. TGF-β inhibits expression of five different cytotoxic genes including perforin, granzyme A, and granzyme B, which then inhibits T cell-mediated tumor clearance.
The application of carbetocin does not affect a non-pregnant uterus with lower oxytocin receptor expression. Carbetocin also functions to thicken the blood, further preventing post-partum hemorrhage. Carbetocin should not be used to induce or augment labor since it could cause cardiac or respiratory distress to mother or infant.
==== Murder ==== Murder has evolved from the honor and vengeance killings of the yakuza or Sicilian mafia which placed large physical and symbolic importance on the act of murder, its purposes and consequences, to a much less discriminate form of expressing power, enforcing criminal authority, achieving retribution or eliminating competition. The role of the hit man has been generally consistent throughout the history of organized crime, whether that be due to the efficiency or expediency of hiring a professional assassin or the need to distance oneself from the commission of murderous acts (making it harder to prove criminal culpability). This may include the assassination of notable figures (public, private or criminal), once again dependent on authority, retribution or competition. Revenge killings, armed robberies, violent disputes over controlled territories and offenses against members of the public must also be considered when looking at the dynamic between different criminal organizations and their (at times) conflicting needs. After killing their victims, the gangsters often try to destroy evidence by getting rid of the victims' remains in such a way as to prevent, hinder, or delay the discovery of the body, to prevent identification of the body, or to prevent autopsy.
I am left with the impression that the attorneys in charge of the Labscam investigation ... seek to take far more credit for the overall success of the proceedings than is rightly due. Philadelphia-based SmithKline agreed to pay the government $325 million which is considered as one of the largest civil settlement ever in a whistle-blower lawsuit. The company settled after the government alleged it paid kickbacks to doctors, billed the government for laboratory tests not performed and committed other violations. SmithKline has denied the allegations, saying the violations were unintentional and the result of ambiguities in regulations and guidelines. When interest and payments to state Medicare funds were taken into account, the final settlement came to about $321 million. VanArtsdalen said Merena and the other whistle-blowers accounted for all but about $15 million of that total. The government failed to reach an agreement with litigants Merena and Grossenbacher on the amount that they would receive from the settlement agreement. The government maintained that Merena was entitled to approximately $10 million of the $65 million attributable to the non-"automated chemistry" claims and has paid Merena this amount. The government and the Spear relators have a proposed agreement that, if approved, will award the Spear relators 15% of the $13 million that the government attributed to a claim called the "CBC Indices" claim. The government previously agreed to pay the whistle-blowers a minimum of $9.7 million but only if they dropped claims to a larger portion.
== The Association for Mass Spectrometry and Advances in Clinical Lab == The major award of the Association for Mass Spectrometry and Advances in Clinical Lab (MSACL) is the MSACL Distinguished Contribution Award.
Sources: en.wikipedia.org
==== Section C: Biology and Food Technology ==== The activities of Section C deal with the application of refrigeration technologies to life sciences and food sciences. Commission C1 Cryobiology, cryomedicine and health products is particularly focused on the application of refrigeration technologies on various branches of medicine: cryosurgery and oncology, cryotherapy, blood, organs and tissue preservation, health products (especially vaccines and thermosensitive preparations). On the one hand, the work focuses on the biological and biochemical aspects of the effects of refrigeration on organs, tissues and treated products, and on the other hand, on the applied refrigeration techniques and technologies. Commission C2 food science and engineering is focused more particularly on the application of refrigeration technologies in the area of food sciences: preservation (refrigeration, freezing); hygiene and safety in its microbiological aspect; process (lyophilisation, cryoconcentration, cryoprecipitation, partial or total crystallisation). The work focuses on establishing a model for the transfer of heat and matter during refrigeration treatments, on the effects of refrigeration on food products, and on the evolution kinetics of products kept in cold storage. The work deals with the impact of the integrity of the cold chain on the quality of food, including in warm climate countries.
==== C ==== Instant coffee – is a beverage derived from brewed coffee beans. Instant coffee is commercially prepared by either freeze-drying or spray drying, after which it can be rehydrated. Instant coffee in a concentrated liquid form is also manufactured.
Short-wave ultraviolet radiation can destroy DNA in living microorganisms. UVC's effectiveness is directly related to intensity and exposure time. UV has also been shown to reduce gaseous contaminants such as carbon monoxide and VOCs. UV lamps radiating at 184 and 254 nm can remove low concentrations of hydrocarbons and carbon monoxide if the air is recycled between the room and the lamp chamber. This arrangement prevents the introduction of ozone into the treated air. Likewise, air may be treated by passing by a single UV source operating at 184 nm and passed over iron pentaoxide to remove the ozone produced by the UV lamp.
When recounting a negative event, humans who receive intranasal oxytocin share more emotional details and stories with more emotional significance. Humans also find faces more trustworthy after receiving intranasal oxytocin. In a study, participants who received intranasal oxytocin viewed photographs of human faces with neutral expressions and found them to be more trustworthy than those who did not receive oxytocin. This may be because oxytocin reduces the fear of social betrayal in humans. Even after experiencing social alienation by being excluded from a conversation, humans who received oxytocin scored higher in trust on the Revised NEO Personality Inventory. Moreover, in a risky investment game, experimental subjects given nasally administered oxytocin displayed "the highest level of trust" twice as often as the control group. Subjects who were told they were interacting with a computer showed no such reaction, leading to the conclusion that oxytocin was not merely affecting risk aversion. When there is a reason to be distrustful, such as experiencing betrayal, differing reactions are associated with oxytocin receptor gene (OXTR) differences. Those with the CT haplotype experience a stronger reaction, in the form of anger, to betrayal. Romantic attachment: In some studies, high levels of plasma oxytocin have been correlated with romantic attachment. For example, if a couple is separated for a long period of time, anxiety can increase due to the lack of physical affection.
Sources: en.wikipedia.org
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.
It binds to and activates PPARδ, a nuclear receptor that regulates genes related to fatty acid oxidation and energy use. This activation alters transcription in tissues such as skeletal muscle and liver. The full range of downstream effects in humans is not fully established.
No, cardarine is not known to occur naturally in plants, animals, or humans. It is a synthetic molecule produced for laboratory research. Products labeled as cardarine should therefore be treated as manufactured chemicals with variable purity.
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.