Everything below concerns Cardarine. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-03-08. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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 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.
| Property | Value | Notes |
|---|---|---|
| Primary target | PPARδ | Nuclear receptor; not androgen receptor |
| Studied indications | Dyslipidemia; obesity; diabetes | Early clinical research; development discontinued |
| Rodent toxicity | Tumor formation in multiple tissues | Dose-dependent findings in some studies |
| Human approval | None | No approved therapeutic use |
| Typical analytical method | LC-MS/MS | Used for identity and quantification |
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.
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.
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.
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.
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.
=== ICD-11 === Anorexia nervosa is classified under feeding or eating disorders in both the ICD-11 and the DSM-5. Like the DSM-5, the ICD-11 also distinguishes between a binge-purge pattern and a restricting pattern with further subcodes.
The new 18th district has two incumbents: Democrat Al Green, who was re-elected unopposed in 2024 for the 9th district, and Christian Menefee who succeeded Sylvester Turner, who died unexpectedly in March 2025, in a special election runoff held in January 2026. The new district, which has a voting age population that is 45% Black and 32.2% Hispanic, includes the Downtown, EaDo, Midtown, Third Ward and Fifth Ward portions of Houston as well as the Texas Medical Center, the Museum District and NRG Stadium, and extends northeast to Settegast and Fall Creek in northeast Houston, Sunnyside and Brays Oaks in south and southwest Houston, and northern Missouri City, Stafford and Fresno in Fort Bend County. In 2024, the district gave Kamala Harris 76.7% of the vote and 78.5% to Colin Allred.
Anatomical model – Three-dimensional representation of human or animal anatomy Body image – Aesthetic perception of one's own body Cell physiology – Study of cell activity Comparative anatomy – Study of similarities and differences in the anatomy of different species Comparative physiology – Study of the diversity of functional characteristics of organisms Development of the human body Glossary of medicine Human physical appearance – Look, outward phenotype Medicine – Diagnosis, treatment, and prevention of illness Organ system Outline of human anatomy The Birth of the Clinic: An Archaeology of Medical Perception
Sources: en.wikipedia.org
Direct adrenergic agents such as epinephrine, norepinephrine, phenylephrine, isoproterenol, and dobutamine may be used when clinically necessary, but reduced initial doses and careful monitoring are advised because of possible potentiation. Phenelzine has also been linked to reduced vitamin B6 levels and pyridoxine deficiency. Modern guidance considers pyridoxine hydrochloride supplementation advisable with phenelzine, either from the start of treatment or if related adverse effects appear, according to clinician preference, and specifically recommends it when paresthesia or peripheral neuropathy occurs. Transaminases such as GABA-transaminase have been shown to be dependent upon vitamin B6 and may be involved in a potentially related process, since the phenelzine metabolite phenylethylidenehydrazine (PEH) is a GABA-transaminase inhibitor. Both phenelzine and vitamin B6 are rendered inactive upon these reactions occurring. The pyridoxine form of B6 is generally preferred for supplementation in this context, since this form has been shown to reduce hydrazine toxicity from phenelzine and, in contrast, the pyridoxal form has been shown to increase the toxicity of hydrazines.
The Salmonella Mutagenesis test (Ames test) uses multiple strains of Salmonella typhimurium that are auxotrophic to histidine to test whether a given chemical can cause mutations by observing its auxotrophic property in response to an added chemical compound. The mutation a chemical substance or compound causes is measured by applying it to the bacteria on a plate containing histidine then moving the bacteria to a new plate without sufficient histidine for continual growth. If the substance does not mutate the genome of the bacteria from auxotrophic to histidine back to prototrophic to histidine, then the bacteria would not show growth on the new plate. So by comparing the ratio of the bacteria on the new plate to the old plate and the same ratio for the control group, it is possible to quantify how mutagenic a substance is, or rather, how likely it is to cause mutations in DNA. A chemical is considered positive for Ames test if it causes mutations increasing the observed reversion rate and negative if presents similar to the control group. There is a normal, but small, number of revertant colonies expected when an auxotrophic bacteria is plated on a media without the metabolite it needs because it could mutate back to prototrophy. The chances of this are low and therefore cause very small colonies to be formed. If a mutagenic substance is added, however, the number of revertants would be visibly higher than without the mutagenic substance.
=== 2019 === In February 25, 2019 at the event of 2019 Mobile World Congress, Sony announced the Xperia 1, the first smartphone featuring a ultrawide 21:9 aspect ratio 4K HDR OLED display (with a resolution of 3840 × 1644), which would be released on May 30, 2019. In May 2019, for the first time in Europe, 8K demonstration content was received via satellite without the need for a separate external receiver or decoder. At the 2019 SES Industry Days conference at Betzdorf, Luxembourg broadcast quality 8K content (with a resolution of 7680 × 4320 pixels at 50 fps) was encoded using a Spin Digital HEVC encoder (at a bit rate of 70 Mbit/s), uplinked to a single 33 MHz transponder on SES' Astra 28.2°E satellites and the downlink received and displayed on a Samsung 82 in (210 cm) Q950RB production model TV.
The American Academy of Sleep Medicine's 2017 clinical practice guidelines recommended the use of ramelteon in the treatment of sleep-onset insomnia. It rated the recommendation as weak and the quality of evidence as very low but concluded that the potential benefits outweighed the potential harms. The guidelines found that ramelteon reduces sleep latency by 9 minutes (95% CITooltip confidence interval 6–12 minutes) but does not improve sleep quality. In contrast to ramelteon, the guidelines did not recommend the use of melatonin.
Sources: en.wikipedia.org
Muscle cramping The cause of cramping is unknown, but may be related to elevated lactate, increased calcium signaling across the sarcoplasmic reticulum caused by membrane instability from reduced levels of ATP, or increased levels of free adenosine. Muscle weakness Muscle weakness is not a major symptom, though the progressive effects of chronic muscle damage from rhabdomyolysis will eventually cause significant weakness. Similarly, the long-term metabolic effects may result in nerve damage.
On 1 March, the PAF conducted airstrikes in Kabul with locals reporting hearing sounds of explosions and gunfire in several parts of Kabul, including Darulaman, and areas near the airport and Kārte Naw. According to residents, Pakistani fighter aircraft began patrolling and conducting intermittent strikes at about 20:30 local time on 28 February; explosions and gunfire were reported until about 06:00 the following morning. Residents also report hearing sound of explosions and gunfire around Shash Darak neighborhood. Shash Darak is home to several Afghan government and intelligence facilities, including Directorate 40 of the Taliban's intelligence service and offices of the Urban Development Ministry. Afghanistan's Ministry of Defense said that air-defense fire had been directed at Pakistani aircraft over Kabul and advised residents not to be alarmed. Later that day, the PAF carried out airstrikes on Bagram Airfield. According to local Afghan sources, the airstrikes were carried out by at least three aircraft, with several explosions being heard. Taliban officials claimed Pakistan's fighter jets attempted to bomb the base but were repelled by anti-aircraft fire and that no damage was sustained. However, satellite imagery published by The New York Times showed a hangar and two warehouses at the base had been destroyed. Pakistani officials later confirmed the strike on Bagram and said it also destroyed military supplies and an unknown number of Black Hawks, C-130 and Super Tucanos on the airfield.
General statistics indicate that 70–80 percent of women require direct clitoral stimulation (consistent manual, oral, or other concentrated friction against the external parts of the clitoris) to reach orgasm. Indirect clitoral stimulation (for example, by means of vaginal penetration) may also be sufficient for female orgasm. The area near the entrance of the vagina (the lower third) contains nearly 90 percent of the vaginal nerve endings, and there are areas in the anterior vaginal wall and between the top junction of the labia minora and the urinary meatus that are especially sensitive, but intense sexual pleasure, including orgasm, solely from vaginal stimulation is occasional or otherwise absent because the vagina has significantly fewer nerve endings than the clitoris. The prominent debate over the quantity of vaginal nerve endings began with Alfred Kinsey. Although Sigmund Freud's theory that clitoral orgasms are a prepubertal or adolescent phenomenon and that vaginal (or G-spot) orgasms are something that only physically mature females experience had been criticized before, Kinsey was the first researcher to harshly criticize the theory. Through his observations of female masturbation and interviews with thousands of women, Kinsey found that most of the women he observed and surveyed could not have vaginal orgasms, a finding that was also supported by his knowledge of sex organ anatomy. Scholar Janice M.
=== Peatlands === Managed burning of moorland vegetation in the UK has been shown to generate PAHs which become incorporated into the peat surface. Burning of moorland vegetation such as heather initially generates high amounts of two- and three-ringed PAHs relative to four- to six-ringed PAHs in surface sediments, however, this pattern is reversed as the lower molecular weight PAHs are attenuated by biotic decay and photodegradation. Evaluation of the PAH distributions using statistical methods such as principal component analyses (PCA) enabled the study to link the source (burnt moorland) to pathway (suspended stream sediment) to the depositional sink (reservoir bed).
== External links == Leptin: Your brain, appetite and obesity by the British Society of Neuroendocrinology Leptin by Colorado State University – last updated 1998 Leptin at 3Dchem.com, description and structure diagrams Overview of all the structural information available in the PDB for UniProt: P41159 (Leptin) at the PDBe-KB.
Sources: en.wikipedia.org
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.
Rodent studies found dose-dependent tumors in several organs. The sponsor discontinued the program over cancer concerns. Human risk from long-term use remains unknown.
Controlled human endurance trials are lacking. Animal studies show increased exercise capacity under some conditions. Anecdotal reports are not equivalent to clinical evidence.
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.