If you have been reading about Cardarine and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Updated 2025-08-28. Numbers and descriptions here follow the published literature rather than marketing material.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
Handling and quality assessment of cardarine reference material follow general laboratory practices for poorly characterized compounds. It typically appears as a white to off-white powder and is sparingly soluble in water but soluble in organic solvents such as dimethyl sulfoxide and ethanol. Storage recommendations usually specify a cool, dry, dark place, with long-term storage at low temperature and desiccation. Purity may be checked by high-performance liquid chromatography with ultraviolet detection, while identity is confirmed by mass spectrometry and nuclear magnetic resonance. No pharmacopeial monograph exists, so reported purity and stability depend on the supplier’s methods.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white powder | Visual description for typical solid reference material. |
| Solubility | Poorly soluble in water; soluble in DMSO | Solubility depends on solvent, purity, and form. |
| Storage | Cool, dry, protected from light | Long-term storage often uses low temperature and desiccant. |
| Common analytical method | LC-MS/MS | Used for detection and quantification in biological matrices. |
| Common synonyms | GW-501516; GW501516; endurobol | Naming varies among literature, vendors, and databases. |
GW501516 binds and activates PPARδ, a nuclear receptor that influences transcription of genes involved in fatty acid oxidation and energy use. Activation shifts some metabolic pathways in preclinical models, which is why the compound has been studied for lipid disorders and exercise-related endpoints. The exact downstream effects in humans are incompletely mapped. PPARδ is expressed in many tissues, including skeletal muscle, liver, and adipose tissue, so broad activation may have varied consequences. Researchers continue to examine how selective or partial activation might alter the balance between benefits and risks.
Published human data are sparse and mostly come from early-phase trials. Those studies examined short-term changes in lipids, glucose, and exercise capacity, but they were not large enough to establish efficacy or long-term safety. Some animal experiments reported increased running endurance, yet such findings do not prove a performance benefit in people. Anti-doping laboratories detect GW501516 and its metabolites in urine or blood using liquid chromatography-tandem mass spectrometry. Detection windows depend on dose, sample type, and individual metabolism. The method is sensitive enough to identify trace residues in tested samples.
Laboratory handling focuses on identity, purity, and stability. Reference standards are typically stored cold and dry, protected from light, because solutions can degrade over time. Analytical checks may use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Impurities and related substances can be separated chromatographically and compared with a known standard. Because cardarine is not an approved drug, compendial monographs are absent, and laboratories often rely on in-house methods. Reported purity varies among unregulated products and should not be assumed from a label.
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.
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.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
=== Use of DNA mismatch-binding proteins === DNA mismatch-binding proteins can distinguish single nucleotide mismatches and thus facilitate differential analysis of SNPs. For example, MutS protein from Thermus aquaticus binds different single nucleotide mismatches with different affinities and can be used in capillary electrophoresis to differentiate all six sets of mismatches.
If DNA damage remains in a cell, transcription of a gene may be prevented and thus translation into a protein may also be blocked. DNA replication may also be blocked and/or the cell may die. In contrast to a DNA damage, a mutation is an alteration of the base sequence of the DNA. Ordinarily, a mutation cannot be recognized by enzymes once the base change is present in both DNA strands, and thus a mutation is not ordinarily repaired. At the cellular level, mutations can alter protein function and regulation. Unlike DNA damages, mutations are replicated when the cell replicates. At the level of cell populations, cells with mutations will increase or decrease in frequency according to the effects of the mutations on the ability of the cell to survive and reproduce. Although distinctly different from each other, DNA damages and mutations are related because DNA damages often cause errors of DNA synthesis during replication or repair and these errors are a major source of mutation.
Ergine (lysergic acid amide; LSA) and isoergine (isolysergic acid amide; iso-LSA) were first identified from hydrolysis of ergot alkaloids in 1932 and 1936, respectively. In 1938, Swiss chemist Albert Hofmann, working at Sandoz Laboratories, synthesized lysergic acid diethylamide (LSD), a synthetic derivative of ergine, while developing new oxytocic drugs derived from ergot. LSD was not further investigated and was placed in storage for 5 years. In 1943 however, Hofmann worked with LSD again and accidentally discovered its hallucinogenic effects when minute amounts of the potent psychedelic absorbed through his skin. His subsequent self-experiment with LSD three days later on April 19 is the psychedelic holiday Bicycle Day. Hofmann and his colleague, psychiatrist Werner Stoll, first described LSD in 1943 and first described its psychedelic effects in 1947. LSD began being distributed by Sandoz Laboratories for research purposes under the brand name Delysid in 1949. Schultes described the indigenous and shamanic use of dimethyltryptamine (DMT)-containing psychedelic plants in 1954 and also described the use of hallucinogenic morning glories in the 1950s. The psychedelic effects of synthesized DMT were described by Hungarian chemist and psychiatrist Stephen Szára in 1956. Osmond described the hallucinogenic and other effects of morning glory seeds in clinical studies in 1955. Hofmann identified and described ergine and isoergine as the active constituents of morning glory seeds in 1960. Their hallucinogenic effects were first described by Hofmann in 1963.
Sources: en.wikipedia.org
While the origins and history of soybean cultivation in the Eastern Himalayas are debated, it was potentially introduced from southern China, more specifically Yunnan province. Alternatively, it could have reached here through traders from Indonesia via Myanmar. Northeast India is viewed as a passive micro-centre within the soybean secondary gene centre. Central India is considered a tertiary gene centre particularly the area encompassing Madhya Pradesh which is also the country largest soybean producer.
Arrhenius base Any substance that, when dissolved in water, increases the concentration of OH− ions, or, alternatively, decreases the concentration of hydronium ions (H3O+), in the resulting aqueous solution. The definition is similar to that of a Brønsted–Lowry base. Contrast Arrhenius acid.
For services to the community in Hockley Heath, West Midlands. Josephine Parkin. For services to the community in Wakefield, West Yorkshire. Rachel Frances Parkinson. For services to the community in Whitefield, Greater Manchester during Covid-19. Bryony Emily Kate Peall. For services to the community in Saxmundham, Suffolk during Covid-19. Diana Marian Pearman. For services to the community in Sonning Common, Oxfordshire. Michelle Louise Pearse. Quality and Business Support Manager, Nuclear Decommissioning Authority. For services to Education and to the community in West Cumbria. Pearl Ann Pearson-Brooke. For services to the community in Martham, Great Yarmouth, Norfolk. Doreen May Peck. For services to the community in Ashtead, Surrey. Captain (Rtd) Michael Neville Pemberton. Chief Executive Officer, Building Extraordinary Communities. For services to Regeneration and to the community in Cumbria. Michael James Penston. For services to the community in Southampton, Hampshire, during Covid-19. Betty Philipson. President, City Road Club (Hull). For services to Cycling and to the community in the East Riding of Yorkshire. Bryan Phillips. Volunteer, Irish Guards Association. For services to Armed Forces Charities in Northern Ireland. Malson Phillips. Chair, South Wales Shire Horse Society. For services to Conservation. Sukhdev Singh Phull. Engineer, Department for Transport. For services to Transport Technology and for charitable services through the Ekom Charity Trust. Brian Pilgrim. Lately Whitehall Area Workplace Services Manager, Government Property Agency.
Sources: en.wikipedia.org
== Forms == Alginates are refined from brown seaweeds. Throughout the world, many of the Phaeophyceae class brown seaweeds are harvested to be processed and converted into sodium alginate. Sodium alginate is used in many industries including food, animal food, fertilisers, textile printing, and pharmaceuticals. Dental impression material uses alginate as its means of gelling. Food grade alginate is an approved ingredient in processed and manufactured foods. Brown seaweeds range in size from the giant kelp Macrocystis pyrifera which can be 20–40 meters long, to thick, leather-like seaweeds from 2–4 m long, to smaller species 30–60 cm long. Most brown seaweed used for alginates are gathered from the wild, with the exception of Laminaria japonica, which is cultivated in China for food and its surplus material is diverted to the alginate industry in China. Alginates from different species of brown seaweed vary in their chemical structure, resulting in different physical properties of alginates. Some species yield an alginate that gives a strong gel, another a weaker gel, some may produce a cream or white alginate, while others are difficult to gel and are best used for technical applications where color does not matter. Commercial grade alginate is extracted from giant kelp Macrocystis pyrifera, Ascophyllum nodosum, and types of Laminaria. Alginates are also produced by two bacterial genera Pseudomonas and Azotobacter, which played a major role in the unravelling of its biosynthesis pathway.
Flavin reductase is a dimer made up of two subunits. Each subunit is similar. Flavin reductase P, FRP, was studied by Tanner, Lei, Tu and Krause and was discovered to have a structure made up of two subunits each containing a sandwich domain and an excursion domain. The excursion domains of each subunit reach out to connect the sandwich domain of the other subunit. This creates a large hydrophobic core in flavin reductase The enzyme has two binding sites, one for NADPH and one for the flavin mononucleotide substrate. The isoalloxazine ring of flavin mononucleotide is where reduction occurs. Therefore, this is where flavin creates a variety of hydrogen bonds to connect to the amino acid side chains of flavin reductase. Side chains 167–169 in FRP block the isoalloxazine ring in FAD from binding the enzyme, making FRP an FMN specific flavin reductase. The placement of methyl groups in the isoalloxazine ring can also have an effect on the binding and specificity of the enzyme for substrate. There is a depletion of a C-terminal extension that allows for the binding of NADPH, and studies show that if it is removed, it is depleted, catalytic activity increases.
Human serum albumin is the main protein of human blood plasma. It makes up around 50% of human plasma proteins. It binds water, cations (such as Ca2+, Na+ and K+), fatty acids, hormones, bilirubin, thyroxine (T4) and pharmaceuticals (including barbiturates). Its main function is to regulate the oncotic pressure of blood. The isoelectric point of albumin is 4.7. Alpha-fetoprotein is a fetal plasma protein that binds various cations, fatty acids and bilirubin. Vitamin D-binding protein binds to vitamin D and its metabolites, as well as to fatty acids. Afamin binds vitamin E. It seems to carry lipidated Wnt proteins and Vitamin E around. Extracellular matrix protein 1 is a less canonical albumin. It regulates bone mineralization. The four canonical human albumins are arranged on chromosome 4 region 4q13.3 in a tandem manner.
Sources: en.wikipedia.org
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.
Most methods use liquid chromatography with tandem mass spectrometry. Urine is common in anti-doping testing, and blood or plasma may be used in research.
Typical guidance is cool, dry, dark storage, often at low temperature and with desiccant. Stability data are limited, so storage conditions should be verified for each batch or supplier.
It binds to and activates PPAR delta, a nuclear receptor that controls expression of genes related to fatty acid oxidation. This mechanism can alter energy metabolism in animal models. It is not a direct stimulant or fat-burning enzyme.