GW501516 raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-09-21. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
| 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.
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.
=== Staudinger ligation === The Staudinger ligation, first reported in 2000, in principle enables the ligation of peptide segments independent of the terminal amino acids. The method is based on the Staudinger reaction. The Staudinger ligation continues to be developed but has not yet found widespread use.
=== Pharmacokinetics === Four primary metabolic pathways of 3-HO-PCP have been identified. These include piperidine hydroxylation, N-dealkylation, O-glucuronidation, and O-sulfate-conjugation. In urine samples, the N-dealkylated-COOH metabolite was the main metabolite detected. Although it was hypothesized that 3-HO-PCP might be a metabolite of PCP in humans, there is no evidence that this is the case. 3-HO-PCP is a metabolite of 3-MeO-PCP.
Capitalizing on the popularity of the Apollo space missions in the early 1970s, Pillsbury marketed "Food Sticks" (also known as "Space Food Sticks") for the consumer market. Fourteen individually packaged sticks were included in a box, and came in six flavors such as peanut butter, caramel, and chocolate. Food Sticks were marketed as a "nutritionally balanced between meal snack". Examples of derivative products can be found in NASA Space Center gift shops, general sweets and novelty shops, online retailers, or at Army Surplus stores. A popular example is freeze-dried ice cream. Tang, originally marketed in 1959, saw an increase in popularity in the 1960s due to its inclusion on American human space flights.
The current understanding of the drying conditions varies between different spray drying configurations and solution contents, but more research is being completed into the determination of what drives each particle shape pathways as future applications in pharmaceutical and industrial areas require better control over specific particle shapes and sizes of their products.
His season high for strikeouts that year was just seven, achieved in a complete game, four-hit, 4–1 victory over Chicago on September 10. In 30 games (29 starts), he had a 10–14 record, 80 strikeouts, and 91 walks in 189+2⁄3 innings pitched. His 14 losses tied with Bob Friend, Roberts, and Curt Simmons for third in the league (behind Kline's 16 and Johnny Podres's 15), but his 3.42 ERA ranked eighth. Sports Illustrated reported, "Mizell and [Larry] Jackson had impressive ERAs between them but lost more than they won." After working out at the YMCA across from Busch Stadium during the 1958–59 offseason, Mizell showed a stronger fastball in 1959. He did not pitch at the beginning of spring training as he negotiated for a new contract, but he wound up settling for $17,000, his salary each of the previous two seasons. On May 15, he had a season-high 10 strikeouts, allowing just four hits and two unearned runs in an 8–2 victory over the Phillies. He had eight strikeouts in the second game of a doubleheader against Philadelphia on June 7, limiting the Phillies to five hits in a 2–0 shutout victory. In the first half of the season, he enjoyed a 9–3 record and a 3.05 ERA. He was named to both National League All-Star teams in 1959 (in those days, two All-Star games were played in a season). However, he did not appear in either game. The second half of the season saw him post a 4–7 record and a 5.94 ERA. On July 19, 1959, Mizell allowed three runs over seven innings to defeat the Braves, 9–5.
Sources: en.wikipedia.org
sequencing The determination of the order or sequence of nucleotides in a nucleic acid molecule, or of amino acids in a peptide, by any means. Sequences are usually written as a linear string of letters which conveniently summarizes much of the atomic-level structure of the molecule.
Bragg on X-ray crystallography, "Concerning the Nature of Things", which helped her decide her future. She was further encouraged by the chemist A.F. Joseph, a family friend who also worked in Sudan. Her state school education did not include Latin, then required for entrance to Oxbridge. Her Leman School headmaster, George Watson, gave her personal tuition in the subject, enabling her to pass the University of Oxford entrance examination. When Hodgkin was asked in later life to name her childhood heroes, she named three women: first and foremost, her mother, Molly; the medical missionary Mary Slessor; and Margery Fry, the Principal of Somerville College.
Distinguished Unit Citations: 15 Medal of Honor: 4 Private John R. Towle(KIA) Private First Class Charles N. Deglopper(KIA) First Sergeant Leonard A. Funk Jr. Private Joe Gandara(KIA) (issued 18 March 2014) Distinguished Service Cross: 37 Distinguished Service Medal: 2 Silver Star: 898 Legion of Merit: 29 Soldier's Medal: 49 Bronze Star Medal: 1,894 Air Medal: 15
=== Sheep wool === Wool from shearing sheep is a little-used yet promising renewable growing medium. In a study comparing wool with peat slabs, coconut fibre slabs, perlite and rockwool slabs to grow cucumber plants, sheep wool had a greater air capacity of 70%, which decreased with use to a comparable 43%, and water capacity that increased from 23% to 44% with use. Using sheep wool resulted in the greatest yield out of the tested substrates, while application of a biostimulator consisting of humic acid, lactic acid and Bacillus subtilis improved yields in all substrates.
{\displaystyle {\begin{aligned}{\frac {\partial f(t,j)}{\partial t}}&=2k_{+}m(t)f(t,j-1)-2k_{+}m(t)f(t,j)\\&+2k_{\rm {off}}f(t,j+1)-2k_{\rm {off}}f(t,j)\\&+k_{-}\sum _{i=j+1}^{\infty }f(t,i)-k_{-}(j-1)f(t,j)\\&+k_{1}m(t)^{n_{1}}\delta _{j,n_{1}}+k_{2}m(t)^{n_{2}}M(t)\delta _{j,n_{2}}\\\\\end{aligned}}}
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.