Everything below concerns PPARδ agonist. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-06-14. 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.
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.
| 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. |
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.
PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.
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.
Qi is a polysemous word that traditional Chinese medicine distinguishes as being able to transform into many different qualities of qi (气; 氣; qì). In a general sense, qi is something that is defined by five "cardinal functions":
Veneer is a thin slice of wood or sometimes bark that typically is glued onto a core panel (typically, wood, particle board or medium-density fiberboard) to produce flat panels such as doors, tops and panels for cabinets, parquet floors and parts of furniture. They are also used in marquetry. Unlike laminates, no two veneer sheets look the same. Plywood consists of three or more layers of veneer. Normally, each is glued with its grain at right angles to adjacent layers for strength. Veneer beading is a thin layer of decorative edging placed around objects, such as jewelry boxes. Veneer is also used to replace decorative papers in wood veneer high pressure laminate.
This results in the Fe2+ ion switching to a low-spin configuration, resulting in a 20% decrease in ionic radius so that now it can fit into the porphyrin ring, which becomes planar. Additionally, this hydrogen bonding results in the tilting of the oxygen molecule, resulting in a Fe–O–O bond angle of around 120° that avoids the formation of Fe–O–Fe or Fe–O2–Fe bridges that would lead to electron transfer, the oxidation of Fe2+ to Fe3+, and the destruction of hemoglobin. This results in a movement of all the protein chains that leads to the other subunits of hemoglobin changing shape to a form with larger oxygen affinity. Thus, when deoxyhemoglobin takes up oxygen, its affinity for more oxygen increases, and vice versa. Myoglobin, on the other hand, contains only one heme group and hence this cooperative effect cannot occur. Thus, while hemoglobin is almost saturated with oxygen in the high partial pressures of oxygen found in the lungs, its affinity for oxygen is much lower than that of myoglobin, which oxygenates even at low partial pressures of oxygen found in muscle tissue. As described by the Bohr effect (named after Christian Bohr, the father of Niels Bohr), the oxygen affinity of hemoglobin diminishes in the presence of carbon dioxide.
== Diagnosis == Laboratory investigations usually show elevated creatine kinase, myopathic/dystrophic muscle pathology and altered α-dystroglycan. Antenatal diagnosis is possible in families with known mutations. Prenatal ultrasound may be helpful for diagnosis in families where the molecular defect is unknown.
David Crocker, a member of the ARPANET research community, writing in the Post, said, "The reports incorrectly credited [EMAIL's] author, a 14-year-old in the late 1970s, as the 'inventor' of email, long after it had become an established service on the ARPANET." Another computer historian, Marc Weber, a curator at the Computer History Museum, said that by 1978, "nearly all the features we're familiar with today had appeared on one system or another over the previous dozen years", including emoticons, mailing lists, and spam mail. After the controversy unfolded, MIT disassociated itself from Ayyadurai's EMAIL Lab and funding was dropped. MIT also revoked Ayyadurai's contract to lecture at the bioengineering department. Ayyadurai characterized the earlier work of Tomlinson, Tom Van Vleck and others as text messaging, rather than an electronic version of an interoffice mail system.
Sources: en.wikipedia.org
The chemical composition of the electronic cigarette aerosol varies across and within manufacturers. Limited data exists regarding their chemistry. However, researchers at Johns Hopkins University analyzed the vape clouds of popular brands such as Juul and Vuse, and found "nearly 2,000 chemicals, the vast majority of which are unidentified." The aerosol of e-cigarettes is generated when the e-liquid comes in contact with a coil heated to a temperature of roughly 100–250 °C (212–482 °F) within a chamber, which is thought to cause pyrolysis of the e-liquid and could also lead to decomposition of other liquid ingredients. The aerosol (mist) produced by an e-cigarette is commonly but inaccurately called vapor. E-cigarettes simulate the action of smoking, but without tobacco combustion. The e-cigarette aerosol looks like cigarette smoke to some extent. E-cigarettes do not produce aerosol between puffs. The e-cigarette aerosol usually contains propylene glycol, glycerin, nicotine, flavors, aroma transporters, and other substances. The levels of nicotine, tobacco-specific nitrosamines (TSNAs), aldehydes, metals, volatile organic compounds (VOCs), flavors, and tobacco alkaloids in e-cigarette aerosols vary greatly. The yield of chemicals found in the e-cigarette aerosol varies depending on, several factors, including the e-liquid contents, puffing rate, and the battery voltage. Metal parts of e-cigarettes in contact with the e-liquid can contaminate it with metals. Heavy metals and metal nanoparticles have been found in tiny amounts in the e-cigarette aerosol.
More research is needed to determine the precise effects of HMB on muscle strength and function in various populations. In severe cases of muscular atrophy, the use of an anabolic steroid such as methandrostenolone may be administered to patients as a potential treatment although use is limited by side effects. A novel class of drugs, called selective androgen receptor modulators, is being investigated with promising results. They would have fewer side effects, while still promoting muscle and bone tissue growth and regeneration. These effects have yet to be confirmed in larger clinical trials.
1993/2755) Housing (Right to Buy) (Priority of Charges) (No. 2) Order 1993 (S.I. 1993/2757) Mortgage Indemnities (Recognised Bodies) (No.2) Order 1993 (S.I. 1993/2758) Food Labelling (Amendment) Regulations 1993 (S.I. 1993/2759) Rules of the Supreme Court (Amendment No. 2) 1993 (S.I. 1993/2760) Northern Ireland (Emergency Provisions) Act 1991 (Codes of Practice) (No. 1) Order 1993 (S.I. 1993/2761) Leasehold Reform, Housing and Urban Development Act 1993 (Commencement and Transitional Provisions No. 3) Order 1993 (S.I. 1993/2762) Environmentally Sensitive Areas (Central Borders) Designation Order 1993 (S.I. 1993/2767) Environmentally Sensitive Areas (Stewartry) Designation Order 1993 (S.I. 1993/2768) Charities (Designated Religious Bodies) (Scotland) Order 1993 (S.I. 1993/2774) Plant Breeders' Rights (Amendment) Regulations 1993 (S.I. 1993/2775) Plant Breeders' Rights (Trees, Shrubs and Woody Climbers) Scheme 1993 (S.I. 1993/2776) Plant Breeders' Rights (Tomatoes) Scheme 1993 (S.I. 1993/2777) Plant Breeders' Rights (Miscellaneous Ornamental Plants) (Variation) Scheme 1993 (S.I. 1993/2778) Plant Breeders' Rights (Sainfoin and Birdsfoot Trefoil) Scheme 1993 (S.I. 1993/2779) Plant Breeders' Rights (Herbaceous Perennials) (Variation) Scheme 1993 (S.I. 1993/2780) Plant Breeders' Rights (Quince Rootstocks) Scheme 1993 (S.I. 1993/2781) Finance Act 1993 (Appointed Day No. 2) Order 1993 (S.I. 1993/2782) Local Government Superannuation (South Yorkshire Transport Limited) Regulations 1993 (S.I. 1993/2783) Northern Ireland (Emergency Provisions) Act 1991 (Codes of Practice) (No.
== External links == Edward Calvin Kendall Biography Edward Calvin Kendall on Nobelprize.org "The Lasker Foundation – Clinical Medical Research Award". Retrieved June 6, 2008. "The Passano Foundation, Inc". Retrieved June 6, 2008. [1]
==== Hypothetical origin ==== The top half of tRNA (consisting of the T arm and the acceptor stem with 5′-terminal phosphate group and 3′-terminal CCA group) and the bottom half (consisting of the D arm and the anticodon arm) are independent units in structure as well as in function. The top half may have evolved first including the 3′-terminal genomic tag which originally may have marked tRNA-like molecules for replication in early RNA world. The bottom half may have evolved later as an expansion, e.g. as protein synthesis started in RNA world and turned it into a ribonucleoprotein world (RNP world). This proposed scenario is called genomic tag hypothesis. In fact, tRNA and tRNA-like aggregates have an important catalytic influence (i.e., as ribozymes) on replication still today. These roles may be regarded as 'molecular (or chemical) fossils' of RNA world. In March 2021, researchers reported evidence suggesting that an early form of transfer RNA could have been a replicator ribozyme molecule in the very early development of life, or abiogenesis. Evolution of type I and type II tRNAs is explained to the last nucleotide by the three 31 nucleotide minihelix tRNA evolution theorem, which also describes the pre-life to life transition on Earth. Three 31 nucleotide minihelices of known sequence were ligated in pre-life to generate a 93 nucleotide tRNA precursor.
Sources: en.wikipedia.org
It got to a point where he'd kept himself so locked up, both physically and emotionally. I kept trying to make contact...Three times a week, like clockwork, I'd call him, but he'd never answer. Every time I was in the area, I was up in front of his place yelling for him ... Even if you could get in his building, he wasn't going to open the door. You'd phone and he wouldn't answer. You couldn't just kick the door in and grab him, though there were so many times I thought about doing that. But if someone won't help themselves, what, really, can anyone else do? Staley's physical appearance had become even worse than before: he had lost several teeth, his skin was sickly pale, and he was severely emaciated. Close friends such as Matt Fox said, "If no one heard from him for weeks, it wasn't unusual". Staley grew increasingly disconnected from his friends and bandmates who repeatedly tried to get him into rehab, but Staley refused. Staley's close friend Mark Lanegan said, "He didn't speak to anybody as of late... It's been a few months since I talked to him. But for us to not talk for a few months is par for the course."
Field ration – a field ration, combat ration or ration pack is a canned or pre-packaged meal, easily prepared and eaten, transported by military troops on the battlefield. Humanitarian daily ration Individual Meal Pack Meal, Ready-to-Eat Military rations
== History == Unintentional use of nickel can be traced back as far as 3500 BCE. Bronzes from what is now Syria have been found to contain as much as 2% nickel. Some ancient Chinese manuscripts suggest that "white copper" (cupronickel, known as baitong) was used there in 1700–1400 BCE. This Paktong white copper was exported to Britain as early as the 17th century, but the nickel content of this alloy was not discovered until 1822. Coins of nickel-copper alloy were minted by Bactrian kings Agathocles, Euthydemus II, and Pantaleon in the 2nd century BCE, possibly out of the Chinese cupronickel.
=== As an invasive species === Although listed as an invasive species in several countries, one source reports that M. oleifera has "not been observed invading intact habitats or displacing native flora", so "should be regarded at present as a widely cultivated species with low invasive potential."
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 targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.