research chemical comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2026-03-03. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
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 |
|---|---|---|
| Solubility | Soluble in dimethyl sulfoxide and some organic solvents; practically insoluble in water | Solvent choice affects laboratory handling |
| Typical storage | -20 °C, desiccated, protected from light | Common condition for research samples |
| Analytical method | Liquid chromatography–tandem mass spectrometry (LC-MS/MS) | Used for identification and quantification in biological or product samples |
| Common synonyms | GW501516, GW-501516, GSK-516, Endurobol | Names found in research and anti-doping literature |
| Regulatory status | Unapproved therapeutic; prohibited in competitive sport | Status can vary by country and context |
A common misconception is that cardarine has been proven safe for human use. In reality, human clinical data are limited, and long-term animal studies have raised concerns about cancer. Another misconception is that it is a supplement or vitamin-like compound. It is a synthetic research chemical with no approved medical indication. Scientific discussion often focuses on its mechanism and detection rather than therapeutic use. Regulatory and anti-doping literature treats it primarily as a prohibited substance.
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.
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.
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.
In early July 2018, then Education Minister, Lisa Thompson, told Queen's Park reporters that starting in September 2018, Ontario schools would no longer be using the sex education curriculum in use since 2015, but would be reverting to the previous curriculum. One of the election campaign promises by the Ford government was to "scrap" the 2015 sex education curriculum. Premier Ford's government said that "it did not order the cancellation." By August 2019, the Ministry of Education, following "widespread consultations," made "only minor tweaks". The "health lesson plan being brought to schools in the fall" of 2019 "is similar to the one Ford crusaded against." On October 11, 2019, Minister Lecce reached a deal with CUPE school support workers, which has to be ratified by CUPE members and averted a pending strike. Premier Ford had said that he would cap "all public sector wage settlements at one per cent per year". The three-year agreement with CUPE was for a "one per cent wage increase annually for the duration of deal." A clause in the agreement clause in the agreement says that if "higher increases are negotiated by other education unions", their union will be able to increase to more than one percent. CUPE also had $58.3 million restored for the "hiring of educational assistants" with an additional $20 million for hiring "more custodians and clerical workers." As well, CUPE's sick leave provisions remained untouched.
=== Pressure reduction === Pressure must be removed from high risk body areas by frequent changes in position in bed or chair, including turning side to side. Chair cushions and air mattresses should be used for immobile patients. Heels should be off of the bed.
== Invertebrates == It is less common to find examples of dedifferentiation (due to a lack of regenerative ability) in most invertebrates. This brief example outlines dedifferentiation in an invertebrate species, and interestingly involves the Msx pathway, as detailed above in the mechanisms section.
14. Item: If the groze darm [large intestine] or the magen [stomach] or the gederme [entrails] are injured, you can heal it thus: sew it together with a fine thread and sprinkle rot puluer [red powder] on it. The same powder is good for all wounds, and the best can be made thus. Take 9 parts of swartz win [black wine] that is the very reddest and 1 lot of hematite, 1 lot each of nutmeg and white frankincense, 3 lots of gum arabic, 1 lot each of sanguinem draconis [dragon’s blood, sap from the Dracaena cinnabari tree] and mumie [mummy]. Pound that all together, make a powder out of it, and keep it as needed. Despite these injuries, however, the Wound Man is still depicted as standing defiantly alive. This reaffirms the fact that the figure was not intended as a threatening one: instead it explained and glorified the cures and medical treatments available in the texts that he accompanied.
=== Indian philosophy === The Upanishads, principal scriptures of Hinduism, propound a creation theory wherein the supreme self transmutes itself to become the creation by exerting tremendous effort and strenuous labor (śrama), which is enabled on by tapas or "heat", considered as the most important element in the entire creation process. The word tapas, in Sanskrit literature, is understood as a reference to the sexual heat or warmth that incubates the birth of life. The root word tapas was commonly used for descriptions of sexual desire and love. The word kama (desire) was homologized with tapas (heat) to explain the emotions and energy that leads to intercourse. The connection between bodily heat (tapas) and sexual desire (kama) is not just metaphorical but is found to be rooted in physiology, "All adolescent and fertile adults are hot." The internal bodily heat, apart from being present inherently in certain body types (thinness more heat), is generated by processes such as "menstruation, childbirth, consumption of hot food, sexual desire" and certain emotions like anger and jealousy. While heat is regarded as necessary to sustain life, with complete coldness corresponding to death, excessive bodily heat is "undesirable and dangerous" as it causes the body to deteriorate by internal consumption. A state of "relative coolness" is considered ideal. Women, in general, are deemed as relatively hotter than men, partly due to menstruation and pregnancies, which result in higher concentrations of blood to the womb.
Sources: en.wikipedia.org
=== White adipose tissue === White adipose tissue, also known as white fat, is one two types of adipose tissue in mammals. White adipose tissue stores energy in the form of triglycerides, which can be broken down to free fatty acids on demand. Its normal function is to store free fatty acids as triglycerides within the tissue. When glucose is deficient, in situations like fasting, white adipose tissue generates glycerol 3-phosphate.
== See also == Upper Voltan Territorial Assembly election, 1957 List of French possessions and colonies French colonial empire French West Africa Heads of state of Burkina Faso Heads of government of Burkina Faso
Shorter D-stem: To understand the role of the unusual long D-stem in tRNASec, artificial variants with shorter D-stems were put into E. coli. It turns out that these variants work faster than the standard version at regular temperatures but easily lose function at high temperatures. This suggests that the long D-stem evolved as an adaptation to high temperature. Removal of SelB and SECIS requirement: In 2013, a new kind of tRNA was artificially created by putting the acceptor stem and CUA anticodon of E. coli tRNASec on the backbone of E. coli tRNASer. This new tRNAUTu can be recognized by ordinary EF-Tu, removing the requirement for SelB and SECIS for elongation. However, about 40% of the insertions were serine instead of selenocystine, suggesting that SelA is not efficiently recognizing this tRNA. In 2014, directed evolution was used to greatly improve the ability of tRNAUTu to be recognized by SelA, achieving a version that results in no detected misincorporation of serine. This enables simple replacement of any residue by Sec in future protein engineering efforts. By 2018, the E. coli system has matured to be suitable for "industrial scale" production. In one case this was achieved by laborotaory evolution. In another case this was achieved by incorporating elements of allo-tRNAs. The tRNAUTu system was adapted to Saccharomyces cerevisiae (yeast), which has no natural selenocystine system, in 2023. A mixture of bacterial and mouse enzymes work on a modified yeast tRNASer, which is able to be recognized by eEF1A.
== History == The compound may have been synthesised by either Jābir ibn Hayyān in the 8th century or Ramon Llull in 1275. It was synthesised in 1540 by Valerius Cordus, who called it "sweet oil of vitriol" (oleum dulce vitrioli) – the name reflects the fact that it is obtained by distilling a mixture of ethanol and sulfuric acid (then known as oil of vitriol) – and noted some of its medicinal properties. At about the same time, Paracelsus discovered the analgesic properties of the molecule in dogs. The name ether was given to the substance in 1729 by August Sigmund Frobenius. It was considered to be a sulfur compound until the idea was disproved in about 1800. The synthesis of diethyl ether by a reaction between ethanol and sulfuric acid has been known since the 13th century.
p3 peptide is known to have a role in AD and DS, however it has not been clearly determined yet. In order to study the function of p3 peptide in AD, specific antibodies’ location techniques have been used to determine its absence or sparseness in aged non-AD brains. As it turns out, p3 peptide is prevalent in selected areas of AD brain in diffuse deposits and in a subset of dystrophic neuritis, both located in the temporal lobe limbic system. Although p3 peptide can assemble into fibrillar aggregates, its hydrophobic properties make it unable to rest in oligomeric forms. This might explain why p3 has no impact on synaptic function and therefore in AD, since it is a non-amyloidogenic product of APP. Despite this fact, p3 has been proved to have a role in formation of non-fibrillar deposits or lesions associated with DS, another neurological disorder that progresses at a faster rate than AD. Accordingly, DS patients have three copies of the APP gene, as they have three copies of the chromosome 21, so APP is overexpressed in the brain and AD develops at an early age. The disruption of the normal function of APP in AD and, consequently, in DS, including overexpression or altered processes, is the most likely explanation for amyloid plaque formation and subsequent neuronal loss and dementia, associated to memory, spatial disorientation and deterioration of intellectual capacity. Since p3 has not been studied deeply, there are different opinions about its role in brain.
Sources: en.wikipedia.org
== Nutritional value == Lysine is an essential amino acid in humans. The human daily nutritional requirement varies from ~60 mg/kg in infancy to ~30 mg/kg in adults. This requirement is commonly met in a western society with the intake of lysine from meat and vegetable sources well in excess of the recommended requirement. In vegetarian diets, the intake of lysine is less due to the limited quantity of lysine in cereal crops compared to meat sources. Given the limiting concentration of lysine in cereal crops, it has long been speculated that the content of lysine can be increased through genetic modification practices. Often these practices have involved the intentional dysregulation of the DAP pathway by means of introducing lysine feedback-insensitive orthologues of the DHDPS enzyme. These methods have met limited success likely due to the toxic side effects of increased free lysine and indirect effects on the TCA cycle. Plants accumulate lysine and other amino acids in the form of seed storage proteins, found within the seeds of the plant, and this represents the edible component of cereal crops. This highlights the need to not only increase free lysine, but also direct lysine towards the synthesis of stable seed storage proteins, and subsequently, increase the nutritional value of the consumable component of crops.
== Domain == The C1q domain is a conserved protein domain. C1q is a subunit of the C1 enzyme complex that activates the serum complement system. C1q comprises 6 A, 6 B and 6 C chains. These share the same topology, each possessing a small, globular C-terminal domain, a collagen-like Gly/Pro-rich central region, and a conserved C-terminal region, the C1q domain. The C1q protein is produced in collagen-producing cells and shows sequence and structural similarity to collagens VIII and X.
=== Animal glutamate–cysteine ligase === Animal glutamate cysteine ligase (GCL) is a heterodimeric enzyme composed of two protein subunits that are coded by independent genes located on separate chromosomes:
Overexpression of HER2 sidesteps these checkpoints, causing cells to proliferate in an uncontrolled fashion. Trastuzumab binds to domain IV of the extracellular segment of the HER2/neu receptor. Monoclonal antibodies that bind to this region have been shown to reverse the phenotype of HER2/neu expressing tumor cells. Cells treated with trastuzumab undergo arrest during the G1 phase of the cell cycle so there is reduced proliferation. It has been suggested that trastuzumab does not alter HER-2 expression, but downregulates activation of AKT. In addition, trastuzumab suppresses angiogenesis both by induction of antiangiogenic factors and repression of proangiogenic factors. It is thought that a contribution to the unregulated growth observed in cancer could be due to proteolytic cleavage of HER2/neu that results in the release of the extracellular domain. One of the most relevant proteins that trastuzumab activates is the tumor suppressor p27Kip1, also known as CDKN1B. Trastuzumab has been shown to inhibit HER2/neu ectodomain cleavage in breast cancer cells. Experiments in laboratory animals indicate that antibodies, including trastuzumab, when bound to a cell, induce immune cells to kill that cell, and that such antibody-dependent cell-mediated cytotoxicity is another important mechanism of action.
Sources: en.wikipedia.org
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.
No. It is not an anabolic-androgenic steroid; it is a synthetic PPARδ agonist. Because it is banned in sport, it is sometimes grouped with doping agents even though its chemical class differs from steroids.
Human data are limited and development was discontinued, so major effects and long-term risks are not well characterized. Some early studies examined metabolic markers, but they do not provide a basis for unsupervised use.
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.