GW501516 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 2026-07-01. Numbers and descriptions here follow the published literature rather than marketing material.
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.
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.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | PPARδ agonist | Not an anabolic steroid. |
| Common synonyms | GW501516, GW-1516 | Cardarine is an informal name. |
| Appearance | White to off-white powder | Typical for research-grade solid. |
| Solubility class | Poorly soluble in water; soluble in some organic solvents | Such as DMSO or ethanol in laboratory settings. |
| Typical storage temperature | Cool, dry, protected from light | Specific conditions vary by supplier and form. |
=== Other uses in arts, entertainment and media === C4 (New Zealand TV channel), a former New Zealand television music channel 1. c4, also called the English Opening, a chess opening Channel 4, British TV channel abbreviated "C4"
5S rRNA is transcribed by RNA polymerase III. The 18S rRNA in most eukaryotes is in the small ribosomal subunit, and the large subunit contains three rRNA species (the 5S, 5.8S and 28S in mammals, 25S in plants, rRNAs). In flies, the large subunit contains four rRNA species instead of three with a split in the 5.8S rRNA that presents a shorter 5.8S subunit (123 nt) and a 30 nucleotide subunit named the 2S rRNA. Both fragments are separated by an internally transcribed spacer of 28 nucleotides. Since the 2S rRNA is small and highly abundant, its presence can interfere with construction of sRNA libraries and compromise the quantification of other sRNAs. The 2S subunit is retrieved in fruit fly and dark-winged fungus gnat species but absent from mosquitoes. The tertiary structure of the small subunit ribosomal RNA (SSU rRNA) has been resolved by X-ray crystallography. The secondary structure of SSU rRNA contains 4 distinct domains—the 5', central, 3' major and 3' minor domains. A model of the secondary structure for the 5' domain (500-800 nucleotides) is shown.
== Cited sources == Martin, Archer J. P. (December 12, 1952). "The development of partition chromatography. Nobel Lecture" (PDF). Nobel Lectures, Chemistry 1942–1962. Amsterdam: Elsevier. Ettre, Leslie Stephen (2001). "The Predawn of Paper Chromatography". Chromatographia. 54 (5–6): 409–414. doi:10.1007/BF02492694. S2CID 95357195. Touchstone, Joseph C. (1993). "History of Chromatography". Journal of Liquid Chromatography. 16 (8): 1647–1665. doi:10.1080/10826079308021679.
Sources: en.wikipedia.org
This does not replace the refrigeration system but facilitates cooling down of the external machinery. Containers stowed on the exposed upper deck are air-cooled, while those under deck are water-cooled. The water cooling design allows additional refrigerated containers under deck, as water can be used to dissipate the high amount of heat they generate. This system draws fresh water from the ship's water supply, which in turn transfers the heat through heat exchangers to the abundantly available sea water.
Pachamanca (from Quechua pacha "earth", manka "pot") is a traditional Peruvian dish baked with the aid of hot stones. The earthen oven is known as a huatia. It is generally made of lamb, mutton, alpaca, llama, guanaco, vicuna, pork, beef, chicken, or guinea pig, marinated in herbs and spices. Other Andean produce, such as potato or chuño (naturally freeze-dried potato), habas (fresh green lima beans in pods), sweet potato, mashua, oca, ulluco, cassava, yacon, plantain, humitas (corn cakes), ears of corn, and chili, are often included in the baking. The dish is primarily made in the central Peruvian Andes in three regions: 1) The upper Huallaga valley, in Huánuco and Pasco vicinity, where it is made with pork and seasoned with chincho and huacatay, two local herbs; 2) in the Mantaro valley and neighboring area around the cities Huancayo, Tarma, and Jauja, they use lamb and a different seasoning; and 3) in several places of the Ayacucho department. In the Peruvian Amazonia, the southern and northern Andes, and the mostly desertic coast, the dish is uncommon due to the lack of firewood or the type of stones needed without any content of sulphur. Meat is wrapped in marmaquilla or chincho leaves before being put in this kind of earthen stove. This important part of Peruvian cuisine, which has existed since the time of the Inca Empire, has evolved over time. Its consumption is now widespread throughout modern Peru, where regional variations have appeared in the technical process of production, but not in the ingredients or their baking.
=== Variation === The size of the pancreas varies considerably. Several anatomical variations exist, relating to the embryological development of the two pancreatic buds. The pancreas develops from these buds on either side of the duodenum. The ventral bud rotates to lie next to the dorsal bud, eventually fusing. In about 10% of adults, an accessory pancreatic duct may be present if the main duct of the dorsal bud of the pancreas does not regress; this duct opens into the minor duodenal papilla. If the two buds themselves, each having a duct, do not fuse, a pancreas may exist with two separate ducts, a condition known as a pancreas divisum. This condition has no physiologic consequence. If the ventral bud does not fully rotate, an annular pancreas may exist, where the pancreas encircles part or all of the duodenum. This may be associated with duodenal atresia.
Sources: en.wikipedia.org
=== E. coli === 2,3-diDHB dehydrogenase catalyzes the NAD+-dependent oxidation of 2,3-dihydro-2,3-dihydroxybenzoate to produce an aromatic compound 2,3-dihydroxybenzoic acid (2,3-DHB or simply DHB). In times of iron deficiency, iron uptake is controlled by three genes: ent, fep, and fes for synthesis, export, and uptake of ferric Enterobactin and its hydrolytic cleavage to release Fe3+ into the cell. This production of this compound is controlled by eight genes: entA-entF, entH, and entS. In E. coli, all of these genes are controlled by the Fur repressor, such that the genes are turned on when the concentration of iron in the environment is low. From these six genes, EntA, EntB, and EntC are responsible for the synthesis of DHB from chorismic acid and the gene EntA encodes the information of 2,3-diDHB dehydrogenase. Without entA, entB, and entC, the bacteria show almost an absolute requirement of DHB in order to survive.
When the recombinant MBP includes a signal peptide, the fusion protein can be exported into the periplasmic space, which facilitates its purification since the periplasmic fluid contains only a limited number of proteins and can be recovered either by an osmotic shock or by permeabilization of the bacterial outer membrane with antibiotics such as Polymyxin B. Such an export of the fusion protein into the periplasmic space enables the formation of disulfide bonds in the passenger protein, for example antibody fragments. Foreign proteins that are exported or secreted in their native organism, can usually be exported into the E. coli periplasm by fusion with MBP. Examples of cytoplasmic proteins that could be exported by fusion with MBP, include the monomeric Klenow polymerase and the dimeric Gene V protein of phage M13. When the recombinant MBP includes either a defective or no signal peptide the fusion protein remains within the bacterial cytoplasm from where it can be recovered by breaking open the cells. The fusion of proteins with MBP usually enhances their solubility and facilitates their proper folding so that the fusion proteins are most often bifunctional. In addition, such fusions can facilitate the crystallisation of difficult proteins, e.g. membrane proteins. The crystallized protein can often have their structures solved by X-ray crystallography using molecular replacement on a known MBP structure.
=== Nucleophilic activation === In vivo nucelophilic addition of thiolates to C12 and consequent opening of the core epoxide has been hypothesized to trigger Bergman cyclization in kedarcidin chromophore. Nucleophilic activation is thought to diminish the ring strain incurred by formation of the cycloaromatized product, and thus activate kedarcidin chromophore toward DNA scission. In the isolation and structural characterization studies carried out by Leet et al., C12-sodium borohydride reduction of kedarcidin chromophore induced rapid cycloaromatization and so facilitated studies of the otherwise unstable natural product. Consequently, C12-nucleophilic activation is proposed extensively in review literature as a possible means for triggering the cycloaromatization event in vivo.
Despite a rally on January 15 on news of lower unemployment insurance claims, the Dow Jones, the Nasdaq, and the S&P 500 closed just below their opening bell valuations on January 16 and finished the week at a loss upon news that Trump suggested that the most likely candidate to replace Powell as Federal Reserve Chair had changed and threats by Trump to impose import tariffs on countries that oppose the United States acquiring Greenland. Over the same two days, the dollar strengthened, gold prices fell, and yields on 2-year and 10-year Treasury notes rose. As indicated by the weakening of the U.S. dollar on its exchange rates, the precious metals price increases, and the rising yields and steepening yield curve on Treasury notes in the bond market over the week following Powell's announcement, market analysts have observed that the investigation and potential loss of the Federal Reserve's independence (along with the geopolitical risks) indicates higher long-term inflation expectations by investors and has reinforced interest for greater global diversification of investment holdings and away from U.S. assets. JPMorgan Chase CEO Jamie Dimon and BNY CEO Robin Vince both criticized the investigation, arguing that undermining the Federal Reserve's independence would raise inflation expectations, increase interest rates in the long-term, and undermine the functioning of the bond market.
Sources: en.wikipedia.org
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.
No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.
No regulatory agency has approved cardarine as a medicine. It was investigated in early research but development was discontinued. It is not available as a prescription drug.
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.