Everything below concerns Cardarine. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-07-13. Numbers and descriptions here follow the published literature rather than marketing material.
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 selective agonist at PPARδ, a nuclear receptor that regulates transcription of genes involved in lipid handling and energy metabolism. Activation of PPARδ in preclinical models increases fatty acid oxidation, mitochondrial biogenesis, and exercise endurance in rodents. These effects have made the compound a subject of metabolic research and also a target for sport anti-doping rules. In humans, however, controlled studies are limited, and whether similar endurance or metabolic changes occur at tolerated exposures remains an open question. The receptor’s broad tissue distribution also means downstream effects may vary by organ and condition.
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.
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.
| 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. |
Published studies have examined GW501516 in animal models of obesity, insulin resistance, and exercise endurance. Early human trials reportedly ended, and development was discontinued after preclinical findings raised concerns about cancer in some rodent studies. Regulatory agencies have not approved cardarine for any medical use. Its availability through non-pharmaceutical channels raises questions about identity, purity, and legal status that are separate from its laboratory pharmacology. Those questions are often addressed through analytical testing rather than assumptions about product labels.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
Stability of GW501516 depends on form, temperature, light exposure, and moisture. Solid reference material is typically stored frozen or refrigerated in a desiccator and protected from light. Solutions in organic solvents such as dimethyl sulfoxide are often kept frozen in aliquots to reduce freeze-thaw cycling. Aqueous solubility is low, so aqueous stock solutions can be difficult to prepare without cosolvents. Degradation may appear as changes in chromatographic purity or mass spectral signal. Stability studies are needed to establish shelf life for any specific preparation.
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.
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.
Chromosome walking can be used for the purpose of cloning a gene. It does this by using the known gene’s markers that are closest and can therefore be used in techniques like isolating DNA sequences and aiding in the sequencing and cloning of the DNA of organisms. Chromosome walking is also useful when it comes to filling in the gaps that may be present in genomes by locating clones that overlap with a library clone end. This means that for chromosome walking to be carried out, it requires a clone library of a genomic format. This is why Vectorette PCR is one of the methods that can be used to create this library for chromosome walking to occur. Vectorette PCR comes in handy when it is necessary to obtain the regions that are both upstream and downstream and flank a sequence that is already known. By obtaining these regions, it provides the library of a genomic format that chromosome walking requires.
The formylglycine tag or aldehyde tag is a convenient 6- or 13-amino acids long tag fused to a protein of interest. The 6-mer tag represents the small core consensus sequence and the 13-mer tag the longer full motif. The experiments on the genetically encoded aldehyde tag by clearly showed the high conversion efficiency with only the core consensus sequence present. Four proteins were produced recombinantly in E.coli with an 86% efficiency of for the full-length motif and >90% efficiency for the 6-mer determined by mass spectrometry. The size of the sequence is analogous to the commonly used 6x His-Tag and has the advantage that it can also be genetically encoded. The sequence is recognized in the ER solely depending on primary sequence and subsequently targeted by FGE. Notably, in the setup of recombinant expression proteins in E. coli a coexpression of exogenous FGE aids full conversion, although E. coli has endogenous FGE-activity. The introduction of an aldehyde tag has a workflow that consists of three segments: A the expression of the fusion protein, that carries the peptide tag derived from the sulfatase motif, B the enzymatic conversion of Cys to f(Gly) and C the bioorthogonal probing with hydrazides or alkoxy amines (Fig. 1).
Integrator complex subunit 15, also known as C7orf26, is a protein encoded in humans by the INTS15 gene. Based on properties of c7orf26 and its conservation over a long period of time, its suggested function is targeted for the cytoplasm and it is predicted to play a role in regulating transcription. Chromosome 7 is one of the 23 pairs of chromosomes in the human body, and spans about 159 million base pairs and represents about 5-5.5% of the total DNA in cells. Changes to the structure of chromosome 7 can result in a number of genetic abnormalities, including Williams Syndrome which causes structural and cosmetic changes to the human body, ultimately resulting in a shorter lifespan. There are hundreds of known open reading frames (ORF) along the domain of chromosome 7, however there is not much known about the 26th reading frame, which is of considerable interest. Currently, two isoforms of c7orf26 are known in Homo Sapiens and are referred to as isoforms 1 and 2, respectively.
National teams June 3 – 9: 2019 FIBA Under-16 Americas Championship in Belém The United States defeated Canada, 94–77, to win their sixth consecutive FIBA Under-16 Americas Championship title. The Dominican Republic took third place. Argentina took fourth place. Note: All teams mentioned above have qualified to compete at the 2020 FIBA Under-17 Basketball World Cup. June 16 – 22: 2019 FIBA Under-16 Women's Americas Championship in Puerto Aysén The United States defeated Canada, 87–37, to win their second consecutive and fifth overall FIBA Under-16 Women's Americas Championship title. Chile took third place. Puerto Rico took fourth place. Note: All teams mentioned above have qualified to compete at the 2020 FIBA Under-17 Women's Basketball World Cup. September 22 – 29: 2019 FIBA Women's AmeriCup in San Juan The United States defeated Canada, 67–46, to win their third FIBA Women's AmeriCup title. Brazil took third place. Note: The first eight teams have qualified to compete at the Americas 2020 Olympic pre-qualifying tournaments. Club teams January 18 – March 31: 2019 FIBA Americas League San Lorenzo defeated Guaros, 64–61, to win their second consecutive FIBA Americas League title.
Sources: en.wikipedia.org
Clear Lake Audiotorium is a six-track promo EP by De La Soul given out to A-list DJs in 1994, the catalog number is TB 1093 (Side A, "THIS SIDE" is TB 1093 A and Side B "OTHER SIDE" is TB 1093 B). It was composed of four tracks from the group's album Buhloone Mindstate and two non-album tracks—"Sh.Fe.Mc's" featuring A Tribe Called Quest, and "Stix & Stonz" featuring The Fearless Four, Grandmaster Caz, and Prince Whipper Whip. With only 500 copies pressed (vinyl and CD), Clear Lake Audiotorium remains one of the most sought-after De La Soul releases to date. Originally pressed on clear/light green vinyl and packaged in a clear plastic sleeve, the record has since been bootlegged on black vinyl. On March 7, 2025, exactly 31 years after its original release, the EP was released officially on streaming releases, alongside a limited physical re-release.
A/B testing (also known as bucket testing, split-run testing or split testing) is a user-experience research method. A/B tests consist of a randomized experiment that usually involves two variants (A and B), although the concept can be also extended to multiple variants of the same variable. It includes application of statistical hypothesis testing or "two-sample hypothesis testing" as used in the field of statistics. A/B testing is employed to compare multiple versions of a single variable, for example by testing a subject's response to variant A against variant B, and to determine which of the variants is more effective. Multivariate testing or multinomial testing is similar to A/B testing but may test more than two versions at the same time or use more controls. Simple A/B tests are not valid for observational, quasi-experimental or other non-experimental situations—commonplace with survey data, offline data, and other, more complex phenomena.
Dysphoria and apathy (due to dopamine receptor blockade) Sedation (particularly common with asenapine, clozapine, olanzapine, quetiapine, chlorpromazine and zotepine) Headaches Dizziness Diarrhea Anxiety Extrapyramidal side effects (particularly common with first-generation antipsychotics), which include: Akathisia, an often distressing sense of inner restlessness. Dystonia, an abnormal muscle contraction Pseudoparkinsonism, symptoms that are similar to what people with Parkinson's disease experience, including tremulousness and drooling Hyperprolactinaemia (rare for those treated with clozapine, quetiapine and aripiprazole), which can cause: Galactorrhoea, the unusual secretion of breast milk. Gynaecomastia, abnormal growth of breast tissue Sexual dysfunction (in both sexes) Osteoporosis Orthostatic hypotension Weight gain (particularly prominent with clozapine, olanzapine, quetiapine and zotepine, can be counteracted by starting the drug with metformin) Antipsychotic medication-induced weight gain (AIWG) is a difficult-to-manage condition. In a meta-analysis analyzing data from 9 studies having more than 40,000 patients with AIWG, use of semaglutide was on an average was associated with 7.37kg weight loss with a good reduction in waist circumference. The occurrence of psychiatric adverse events was lower in semaglutide users.
== Formation == Peach gum is not a normal product of healthy peach trees. It forms when trees are injured, diseased, or when bark is deliberately cut. The resin seeps from wounds and solidifies when exposed to air and sunlight, forming amber-colored, translucent crystalline pieces.
Type III Collagen is a homotrimer, or a protein composed of three identical peptide chains (monomers), each called an alpha 1 chain of type III collagen. Formally, the monomers are called collagen type III, alpha-1 chain and in humans are encoded by the COL3A1 gene. Type III collagen is one of the fibrillar collagens whose proteins have a long, inflexible, triple-helical domain.
Sources: en.wikipedia.org
=== Vegetarian casings === Some innovative coextrusion processes have been developed in recent years, allowing 100% plant-based vegetarian casings to be created. Some special alginate coextrusion equipment is required to make casings that can be used in halal or kosher food making.
=== Goodpasture syndrome === The alpha-3 subunit (COL4A3) of collagen IV is thought to be the antigen implicated in Goodpasture syndrome, wherein the immune system attacks the basement membranes of the glomeruli and the alveoli upon the antigenic site on the alpha-3 subunit becoming unsequestered due to environmental exposures. Goodpasture syndrome presents with nephritic syndrome and hemoptysis. Microscopic evaluation of biopsied renal tissue will reveal linear deposits of Immunoglobulin G by immunofluorescence. This is classically in young adult males.
3-M syndrome or 3M3 is a rare hereditary disorder characterized by severe growth retardation, facial dysmorphia, and skeletal abnormalities. The name 3-M is derived from the initials of the three researchers who first identified it: Miller, McKusick, and Malvaux; they reported their findings in the medical literature in 1972. Mutations in any one of the following three genes: CUL7, OBSL1, and CCDC8 are responsible for the occurrence of this disorder. It is inherited through an autosomal recessive pattern and considered very rare, so far less than 100 cases worldwide have been identified. Diagnosis is based on the presence of clinical features. Genetic testing can confirm the diagnosis and identify the specific gene involved. Treatment is aimed at addressing the growth and skeletal problems and may include surgical bone lengthening, adaptive aids, and physical therapy. An endocrinologist may assist with growth hormone replacement and appropriate evaluations during puberty.
== Structure == Hyaline cartilage is the most common kind of cartilage in the human body. It is primarily composed of type II collagen and proteoglycans. Hyaline cartilage is located in the trachea, nose, epiphyseal plate, sternum, and ribs. Hyaline cartilage is covered externally by a fibrous membrane known as the perichondrium. The primary cells of cartilage are chondrocytes, which are in a matrix of fibrous tissue, proteoglycans and glycosaminoglycans. As cartilage does not have lymph glands or blood vessels, the movements of solutes, including nutrients, occur via diffusion within the fluid compartments contiguous with adjacent tissues. Cartilage gives the structures a definite but pliable form, making them strong, but with limited mobility and flexibility. Cartilage has no nerves. Hyaline cartilage also forms the temporary embryonic skeleton, which is gradually replaced by bone, and the skeleton of elasmobranch fish.
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.
Yes, WADA prohibits cardarine as a PPARδ agonist. It appears on the prohibited list and can be detected in urine or blood. Athletes using it risk sanctions.