The short version of Cardarine fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-02-02. Anything still debated is marked as such rather than presented as settled.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Common for reference-grade material. |
| Solubility | Low in water | Dissolves in DMSO and some organic solvents. |
| Typical storage | -20 °C, desiccated | Protect from light and moisture. |
| Analytical method | LC-MS/MS | Used for trace detection in biological matrices. |
| Purity assessment | HPLC with UV detection | Often combined with NMR and mass spectrometry. |
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.
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.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
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.
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.
Historically, many of the prestigious universities in Peru have been public, including the National University of San Marcos. Founded in May 1551, it is the top university in Peru and the oldest university in the Americas. To be admitted into one of the national public universities, students must have a high score on the admission test. In 2002, the most prestigious public universities joined and created the Strategic Alliance of Peruvian Universities, including National University of San Marcos, La Molina – National Agrarian University, National University of Engineering, Federico Villarreal University, and the National University of Callao. Other public and private universities joined as an associate or advisory members.
== Chestnut family colors == Chestnut is considered a "base color" in the discussion of equine coat color genetics. Additional coat colors based on chestnut are often described in terms of their relationship to chestnut:
== Methods == One-place studies exploit manuscript ecclesiastical and civil records to explore the microhistory of the villagers and their lives. In Europe, such records usually date back to about 1600 and include:
4 Cyt c2+ + O2 + 8 H+(inside) → 4 Cyt c3+ + 2 H2O + 4 H+(outside) Although the heme proteins are the most important class of iron-containing proteins, the iron–sulfur proteins are also very important, being involved in electron transfer, which is possible since iron can exist stably in either the +2 or +3 oxidation states. These have one, two, four, or eight iron atoms that are each approximately tetrahedrally coordinated to four sulfur atoms; because of this tetrahedral coordination, they always have high-spin iron. The simplest of such compounds is rubredoxin, which has only one iron atom coordinated to four sulfur atoms from cysteine residues in the surrounding peptide chains. Another important class of iron–sulfur proteins is the ferredoxins, which have multiple iron atoms. Transferrin does not belong to either of these classes. The ability of sea mussels to maintain their grip on rocks in the ocean is facilitated by their use of organometallic iron-based bonds in their protein-rich cuticles. Based on synthetic replicas, the presence of iron in these structures increased elastic modulus 770 times, tensile strength 58 times, and toughness 92 times. The amount of stress required to permanently damage them increased 76 times.
== Consistency == Various studies on a particular topic often do not address the same outcomes, making it difficult to draw clinically useful conclusions when a group of studies is looked at as a whole. The Core Outcomes in Women's Health (CROWN) Initiative is one effort to standardize outcomes.
Sources: en.wikipedia.org
== Function == Proteins of the OAT family catalyze the Na+-independent facilitated transport of fairly large amphipathic organic anions (and less frequently neutral or cationic drugs), such as bromosulfobromophthalein, prostaglandins, conjugated and unconjugated bile acids (taurocholate and cholate), steroid conjugates, thyroid hormones, anionic oligopeptides, drugs, toxins and other xenobiotics. One family member, OATP2B1, has been shown to use cytoplasmic glutamate as the exchanging anion. Among the well characterized substrates are numerous drugs including statins, angiotensin-converting enzyme inhibitors, angiotensin receptor blockers, antibiotics, antihistaminics, antihypertensives and anticancer drugs. Other substrates include luciferin, thyroid hormones and quinolones. Organic anion transporting polypeptides carry bile acids as well as bilirubin and numerous hormones such as thyroid and steroid hormones across the basolateral membrane (facing sinusoids) in hepatocytes, for excretion in bile. As well as expression in the liver, OATPs are expressed in many other tissues on basolateral and apical membranes, transporting anions, as well as neutral and even cationic compounds. They also transport an extremely diverse range of drug compounds, ranging from anti-cancer, antibiotic, lipid lowering to anti-diabetic drugs, as well as toxins and poisons. Various anti-cancer drugs like pazopanib, vandetanib, nilotinib, canertinib and erlotinib are known to be transported via OATPs (OATP-1B1 and OATP-1B3).
=== Latin America === During World War II, the United States military operations had widespread support across Latin America, except for Argentina. After 1947, with the Cold War emerging in Europe, Washington made repeated efforts to encourage all the Latin American countries to take a Cold War anti-Communist position. They were reluctant to do so—for example, only Colombia sent soldiers to the United Nations Command in the Korean War. The Soviet Union was quite weak across Latin America. Not until the late 1950s did Moscow achieve diplomatic or commercial relationships with most Latin American countries., Before then it had only two trade agreements (with Argentina and Mexico). The communist movements that had existed in Brazil and elsewhere in the 1930s had been disbanded or outlawed. Washington exaggerated the dangers, and decided on a preemptive attack against a possible communist threat. It sought anti-communist resolutions at the annual meetings of the Pan American Union (renamed the Organization of American States (OAS) in 1948) and paid special attention to the growth of left-wing forces in Guatemala. A compromise was reached whereby the Latin American states agreed on vague statements of support for the American Cold War position, and the United States provided expanded financial grants and loans to stimulate economic growth. In 1954, at the 10th Inter-American Conference in Caracas, Washington demanded a resolution that the establishment of a communist government in any American state was a threat to the peace of the Western Hemisphere.
== Usage == Young's modulus enables the calculation of the change in the dimension of a bar made of an isotropic elastic material under tensile or compressive loads. For instance, it predicts how much a material sample extends under tension or shortens under compression. The Young's modulus directly applies to cases of uniaxial stress; that is, tensile or compressive stress in one direction and no stress in the other directions. Young's modulus is also used in order to predict the deflection that will occur in a statically determinate beam when a load is applied at a point in between the beam's supports. Other elastic calculations usually require the use of one additional elastic property, such as the shear modulus
Guatemala cast the only negative vote. The Guatemalan Armed Forces, with CIA encouragement, overthrew its left-wing government later that year. Fidel Castro engineered his revolutionary takeover of Cuba in 1957–58 with very little Soviet support. The United States and the smaller Latin countries, outvoted the larger powers by the required two-thirds majority in 1962 to identify Cuba as a communist regime and suspend it from the OAS.
=== Skin pigmentation === Though MCH was initially discovered for its role in determining pigmentation levels in fish, determining MCH's role in mammalian skin pigmentation has been much more difficult. However, MCHR1 has been found in human melanocytes and some melanoma cells, so MCH is able to bind to these cells as well as keratinocytes though they do not express MCHR1. In melanocytes, MCH seems to have an antagonistic relationship with α-MSH, and decreased melanin production. Though, more information is needed to fully understand MCH's relationship with skin pigmentation in mammals.
Sources: en.wikipedia.org
==== CYP17A1 inhibition ==== Flutamide and hydroxyflutamide have been found in vitro to inhibit CYP17A1 (17α-hydroxylase/17,20-lyase), an enzyme which is required for the biosynthesis of androgens. In accordance, flutamide has been found to slightly but significantly lower androgen levels in GnRH analogue-treated male prostate cancer patients and women with polycystic ovary syndrome. In a directly comparative study of flutamide monotherapy (375 mg once daily) versus bicalutamide monotherapy (80 mg once daily) in Japanese men with prostate cancer, after 24 weeks of treatment flutamide decreased dehydroepiandrosterone (DHEA) levels by about 44% while bicalutamide increased them by about 4%. As such, flutamide is a weak inhibitor of androgen biosynthesis. However, the clinical significance of this action may be limited when flutamide is given without a GnRH analogue to non-castrated men, as the medication markedly elevates testosterone levels into the high normal male range via prevention of AR activation-mediated negative feedback on the hypothalamic–pituitary–gonadal axis in this context.
WHO Statement on 2-Dodecylcyclobutanone and Related Compounds, 2003 at the Wayback Machine (archived 2013-04-29) Evaluation of the Significance of 2-Dodecylcyclobutanone and other Alkylcyclobutanones Archived August 2, 2017, at the Wayback Machine
=== Food industry === In food and beverages, glycerol serves as a humectant, solvent, and sweetener, and may help preserve foods. It is also used as filler in commercially prepared low-fat foods (e.g., cookies), and as a thickening agent in liqueurs. Glycerol and water are used to preserve certain types of plant leaves. It is recommended as an additive when polyol sweeteners such as erythritol and xylitol are used, as its perceived heating effect in the mouth will counteract these sweeteners' perceived cooling effect.
On February 11, 2015, Newsom announced that he was opening a campaign account for governor in the 2018 elections, allowing him to raise funds for a campaign to succeed Brown as governor of California. On June 5, 2018, he finished in the top two in the nonpartisan blanket primary, and he defeated Republican John H. Cox by a landslide in the November 6 general election.
=== Caroline Owens === In October 1972, the Wests hired 17-year-old Caroline Owens as their children's nanny. They had picked her up one night on a secluded country road as she hitchhiked from Tewkesbury to her home in Cinderford, having visited her boyfriend. Learning that Owens disliked her stepfather and was looking for a job, Fred and Rose offered her part-time employment as a nanny to the three children then in their household, with a promise she would be driven home each Tuesday. Several days later, Owens moved into 25 Cromwell Street and shared a room with Anne Marie, whom Owens noted was "very withdrawn." Rose, who had begun to engage in prostitution by this time, explained to Owens that she worked as a masseuse when the younger woman enquired about the steady stream of men visiting her. When Owens herself became the recipient of the Wests' overt sexual advances, she announced her intentions to leave Cromwell Street and return home. Knowing Owens' habits of hitchhiking along the A40 between Cinderford and Tewkesbury, the Wests formulated a plan to abduct her for their shared gratification. Fred later admitted that the specific intent of this abduction was the rape and likely murder of Owens, but that his initial incentive was to determine whether his wife would be willing to at least assist him in an abduction. On 6 December 1972, the couple lured Owens into their vehicle with an apology for their previous conduct and the offer of a lift home.
Sources: en.wikipedia.org
LC-MS/MS is common, often after sample cleanup. The assay targets GW501516 or its metabolites.
Reference material is usually kept cold, dry, and protected from light. Frozen aliquots reduce repeated freeze-thaw cycles.
No approved pharmaceutical product exists, so manufacturing and quality controls are not standardized. Products may contain different compounds or impurities.
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.