Everything below concerns Carcinogenicity. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-07-06. Numbers and descriptions here follow the published literature rather than marketing material.
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.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
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.
| 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. |
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.
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 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.
However, it continued to conduct its work independently. In September 2022, the Lancet commission published a wide-ranging report on the pandemic, including commentary on the virus origin overseen by the group's chairman, economist Jeffrey Sachs. The report suggested that the virus may have originated from an American laboratory, a notion promoted by Sachs since late 2020, including in 2022 on the podcast of anti-vaxx conspiracy theorist Robert F. Kennedy Jr. Reacting to the Commission report, virologist Angela Rasmussen commented that this may have been "one of The Lancet's most shameful moments regarding its role as a steward and leader in communicating crucial findings about science and medicine". Virologist David Robertson said the invocation of US laboratory involvement was "wild speculation" and that "it's really disappointing to see such a potentially influential report contributing to further misinformation on such an important topic". The task force published their own report in October 2022, saying they concluded there was "overwhelming" evidence of a natural spillover, but they also accepted the possibility of a lab leak.
DiCaprio continued to gain acclaim for his performances in the biopic The Aviator (2004), the political thriller Blood Diamond (2006), the crime thriller The Departed (2006), the romantic drama Revolutionary Road (2008), the action thriller Inception (2010), the western Django Unchained (2012), the biopic The Wolf of Wall Street (2013), the survival drama The Revenant (2015)—for which he won the Academy Award for Best Actor—the comedy-drama Once Upon a Time in Hollywood (2019), the crime drama Killers of the Flower Moon (2023) and the action film One Battle After Another (2025). DiCaprio is the founder of Appian Way Productions—a production company that has made some of his films and environmental documentaries, such as the series Greensburg (2008–2010)—and the Leonardo DiCaprio Foundation, a nonprofit organization devoted to promoting environmental awareness. A United Nations Messenger of Peace, he regularly supports charitable causes. In 2005, he was named a Commander of the Order of Arts and Letters for his contributions to the arts, and in 2016, he appeared in Time magazine's 100 most influential people in the world. DiCaprio was voted one of the 50 greatest actors of all time in a 2022 readers' poll by Empire magazine.
== Other studies == Lung cancer - Life Length is working on developing an algorithm to detect patients at risk for lung cancer. With its telomere measurement platform, the test could potentially fill the gap in lung cancer screening techniques in a routine, minimally invasive, and low-cost way. Life Length was the European Seal of Excellence by the European Commission for its project proposal in lung cancer research. Childhood cancer - Life Length has conducted the largest childhood cancer research project to date, obtaining samples from about 100 children with cancer and healthy children. The aim of the study was to help oncology and hematology specialists make better decisions and increase the chances of these children beating cancer. Life Length has carried out these studies with the support of one of the most important children's hospitals in Spain, the Hospital Infantil Universitario Niño Jesús.
=== Hydrodynamic methods === To a first approximation, the basis for determination of molecular mass according to Mark–Houwink relations is the fact that the intrinsic viscosity of solutions (or suspensions) of macromolecules depends on volumetric proportion of the dispersed particles in a particular solvent. Specifically, the hydrodynamic size as related to molecular mass depends on a conversion factor, describing the shape of a particular molecule. This allows the apparent molecular mass to be described from a range of techniques sensitive to hydrodynamic effects, including DLS, SEC (also known as GPC when the eluent is an organic solvent), viscometry, and diffusion ordered nuclear magnetic resonance spectroscopy (DOSY). The apparent hydrodynamic size can then be used to approximate molecular mass using a series of macromolecule-specific standards. As this requires calibration, it's frequently described as a "relative" molecular mass determination method.
Sources: en.wikipedia.org
== Management == Management of AIS is currently limited to symptomatic management; methods to correct a malfunctioning androgen receptor protein that result from an AR gene mutation are not currently available. Areas of management include sex assignment, genitoplasty, gonadectomy in relation to tumor risk, hormone replacement therapy, and genetic and psychological counseling. Non-consensual interventions are still often performed, although general awareness on the resulting psychological traumatization is rising.
===== Nanocubes ===== Silver nanocubes can be synthesized using ethylene glycol as a reducing agent and PVP as a capping agent, in a polyol synthesis reaction (vide supra). A typical synthesis using these reagents involves adding fresh silver nitrate and PVP to a solution of ethylene glycol heated at 140 °C. This procedure can actually be modified to produce another anisotropic silver nanostructure, nanowires, by just allowing the silver nitrate solution to age before using it in the synthesis. By allowing the silver nitrate solution to age, the initial nanostructure formed during the synthesis is slightly different than that obtained with fresh silver nitrate, which influences the growth process, and therefore, the morphology of the final product. Nanorods, Nanobars, and Nanowires Silver nanorods (also categorized as nanobars or nanowires depending on their aspect ratio), are a class of anisotropic nanoparticles extensively studied for their tunable electrical and optical properties. Their morphology is typically controlled by selective capping agents during the synthesis. For instance, polyvinylpyrrodine (PVP) can strongly bind to the {100} facets of silver seeds while interacting more weakly with the {111} facets. This preferential adsorption restricts growth on the {100} surfaces and promotes elongation at the <110> direction, ultimately resulting in the formation of rod-like structures.
Briton Callum Tindal-Draper is killed while fighting with the 4th International Legion in Ukraine. 6 November – At Newcastle Crown Court, former GP Thomas Kwan is sentenced to 31 years in prison after posing as a community nurse to inject his mother's partner with a substance that caused him to contract a flesh eating disease following a row over inheritance. 7 November The Bank of England cuts the UK interest rate by 0.25% to 4.75%, but indicates further cuts may take longer than previously thought following the October budget, which it forecasts will lead to price increases. Argentinian authorities announce that three people have been charged in connection with the death of One Direction's Liam Payne. A report into more than 100 allegations of sexual abuse against barrister John Smyth QC, who died in 2018, finds his activities were covered up by the Church of England for several decades. Smyth used his home as a Christian summer camp during the 1970s and 1980s, when the abuse of boys and young men is thought to have happened. The Football Association opens a safeguarding inquiry into a Premiership club official following sexual allegations made by three women. The charity organisation Care England estimates that as a result of the increase in employers' National Insurance contributions and the national minimum wage in the recent budget, that the cost of providing care will increase by over £3,000 per person and that the increases are expected to be passed on to care home residents and their relatives.
Sources: en.wikipedia.org
Xi has overseen regional economic development initiatives within China such as the Coordinated Development of the Beijing-Tianjin-Hebei Region, Strategy for Integrated Development of the Yangtze River Delta and the Guangdong–Hong Kong–Macao Greater Bay Area. Xi has been involved in the development of Xiong'an, a new area announced in 2017, planned to become a major metropolis near Beijing; the relocation aspect is estimated to last until 2035 while it is planned to developed into a "modern socialist city" by 2050. Additionally, Xi's administration has accelerated efforts to further integrate border regions such as Tibet and Xinjiang with the rest of China. Xi supports dual circulation, a reorientation of the economy towards domestic consumption while remaining open to foreign trade and investment. Xi has prioritised boosting productivity. Xi has attempted to reform the property sector to combat the steep increase in prices and cut the economy's dependence on it. In the 19th CCP National Congress, Xi declared "houses are for living, not for speculation." In 2020, Xi's government formulated the "three red lines" policy that aimed to deleverage the heavily indebted property sector. Xi has supported a property tax, for which he has faced resistance from members of the CCP. His administration pursued a debt-deleveraging campaign, seeking to slow and cut the unsustainable amount of debt China has accrued during its growth.
== History == The organization was formed in 1956 when the Council of American Bioanalysts (CAB) merged with the National Association of Clinical Laboratories (NACL) The AAB serves as an umbrella organization for the American Board of Bioanalysis, AAB Board of Registry AAB Associate Member Section, College of Reproductive Biology Environmental Biology and Public Health Section and National Independent Laboratory Association. In 1999, the International Society for Clinical Laboratory Technologists (ISCLT) merged with the American Association of Bioanalysts. Founded in 1962, the credentialing commission of the ISCLT certified medical technologists under Registered Medical Technologist RMT (ISCLT).
In general, a starting molecule is adhered to a solid support (typically an insoluble polymer), then additional reactions are performed, and the final product is purified and then cleaved from the solid support. Since the molecules of interest are attached to a solid support, it is possible to reduce the purification after each reaction to a single filtration/wash step, eliminating the need for tedious liquid-liquid extraction and solvent evaporation steps that most synthetic chemistry involves. Furthermore, by using heterogeneous reactants, excess reagents can be used to drive sluggish reactions to completion, which can further improve yields. Excess reagents can simply be washed away without the need for additional purification steps such as chromatography.
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.
Cardarine is a common name for the investigational compound GW501516. It acts as a PPARδ agonist and is not approved for human use. It is prohibited in sport.