Everything below concerns Cardarine. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-09-25. Numbers and descriptions here follow the published literature rather than marketing material.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
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.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
| Property | Value | Notes |
|---|---|---|
| IUPAC name | {4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid | Systematic name for GW501516 |
| CAS Registry Number | 317318-70-0 | Unique identifier for the parent compound |
| Molecular formula | C21H18F3NO3S2 | Includes carbon, hydrogen, fluorine, nitrogen, oxygen, and sulfur |
| Molecular weight | 453.5 g/mol | Approximate value for the neutral form |
| Appearance | White to off-white powder | Typical description for purified laboratory material |
GW501516 acts on PPARδ, a nuclear receptor that helps regulate fatty acid oxidation and energy homeostasis. In animal studies, activation of this receptor was associated with increased endurance and changes in lipid metabolism. Human trials examined effects on blood lipids and other metabolic markers, but the compound did not advance to approval. Rodent studies later reported tumors in multiple tissues at doses used in those experiments. Whether those findings translate to human risk remains uncertain, and the clinical relevance of the animal data is still debated.
Regulatory bodies treat GW501516 as a prohibited substance in competitive sport. The World Anti-Doping Agency added it to the prohibited list, and it falls under classes covering metabolic modulators and hormone-related agents. It is not approved by drug regulators for human use, and it is not a lawful dietary supplement. Products sold under the cardarine name may contain unlisted ingredients or different compounds. Because no approved product exists, quality and identity are not guaranteed by pharmaceutical manufacturing standards.
Cardarine is a common name for the investigational chemical GW501516, also written GW-1516. It was developed as a peroxisome proliferator-activated receptor delta agonist for metabolic conditions such as dyslipidemia. Early research focused on lipid handling and energy use in skeletal muscle and other tissues. The compound was never approved as a medicine. In public discussion, it is often grouped with performance-enhancing substances, although its receptor target differs from that of anabolic steroids or selective androgen receptor modulators. Regulatory and health authorities have issued warnings about its use.
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.
It is not possible to determine the structure of a protein with H/D exchange other than neutron crystallography nor is it possible to define secondary structural elements. The reasons for this are related to the way in which protein structure slows exchange. Exchange rates are a function of two parameters: solvent accessibility and hydrogen bonding. Thus an amide which is part of an intramolecular hydrogen bond will exchange slowly if at all, while an amide on the surface of protein hydrogen bonded to water will exchange rapidly. Amides buried from the solvent but not hydrogen bonded may also have very slow exchange rates. Because both solvent accessibility and hydrogen bonding contribute to the rate of exchange, it becomes difficult to attribute a given exchange rate to a structural element without crystallography or NMR structural data. H–D exchange has been used to characterize the folding pathway of proteins, by refolding the protein under exchange conditions. In a forward exchange experiment (H to D), a pulse of deuterium is added after various amounts of refolding time. The parts of the structure that form rapidly will be protected and thus not exchanged, whereas areas that fold late in the pathway will be exposed to the exchange for longer periods of time. Thus H/D exchange can be used to determine the sequence of various folding events. Factors determining the time resolution of this approach are the efficiency of mixing and how quickly the quench can be performed after the labeling.
Shelf life is the length of time that a commodity may be stored without becoming unfit for use, consumption, or sale. In other words, it might refer to whether a commodity should no longer be on a pantry shelf (unfit for use), or no longer on a supermarket shelf (unfit for sale, but not yet unfit for use). It applies to cosmetics, foods and beverages, medical devices, medicines, explosives, pharmaceutical drugs, chemicals, tyres, batteries, and many other perishable items. In some regions, an advisory best before, mandatory use by or freshness date is required on packaged perishable foods. The concept of expiration date is related but legally distinct in some jurisdictions.
=== Freeze-dried ingredients === Freeze-drying requires the use of heavy machinery and is not something that most campers can do on their own. Freeze-dried ingredients are often considered superior to dehydrated ingredients because they rehydrate at camp faster and retain more flavor than their dehydrated counterparts. Freeze-dried ingredients take so little time to rehydrate that they can often be eaten without cooking them first and have a texture similar to a crunchy chip. Small amounts of freeze-dried ingredients are sometimes available for sale from emergency supply outlets or stores specific to camping. Freeze-dried ingredients that have not been combined into a meal are often hard to find and thus tend to be sought out by campers. One of the first freeze-dried camping foods companies was Backpacker's Pantry in 1951, originally named Dri-lite Foods, invented after an ill-fated Girl Scout camping trip by Anne Benedict, becoming the first adventure food on the market.
Hong Kong and mainland China: There are two border crossings between Hong Kong and mainland China at which border controls imposed by the two jurisdictions are colocated: West Kowloon Railway Station (simplified Chinese: 香港西九龙站; traditional Chinese: 香港西九龍站): A component of the Guangzhou–Shenzhen–Hong Kong Express Rail Link (Chinese: 廣深港高速鐵路; pinyin: Guǎng–Shēn–Gǎng Gāosù Tiělù), West Kowloon Station contains a "Mainland Port Area (simplified Chinese: 站内地口岸区; traditional Chinese: 站內地口岸區)", essentially enabling passengers and goods to clear mainland Chinese immigration on Hong Kong soil. Shenzhen Bay Port (simplified Chinese: 深圳湾口岸; traditional Chinese: 深圳灣口岸): The land border checkpoint at Shenzhen Bay Port in the mainland contains a Hong Kong Port Area (simplified Chinese: 港方口岸区; traditional Chinese: 港方口岸區) which enables passengers and goods to clear Hong Kong border controls in the mainland. The checkpoint is located in mainland China on land leased from the city of Shenzhen in Guangdong province. By enabling travellers to clear both Chinese and Hong Kong border controls at a single location, it eliminates the need for a second checkpoint on the Hong Kong side of the Shenzhen Bay Bridge.
== Similar approaches == The idea of using protein design to accomplish the same goals as DNA origami has surfaced as well. Researchers at the National Institute of Chemistry in Slovenia are working on using rational design of protein folding to create structures much like those seen with DNA origami. The main focus of current research in protein folding design is in the drug delivery field, using antibodies attached to proteins as a way to create a targeted vehicle.
Sources: en.wikipedia.org
Spark ionization (also known as spark source ionization) is a method used to produce gas phase ions from a solid sample. The prepared solid sample is vaporized and partially ionized by an intermittent discharge or spark. This technique is primarily used in the field of mass spectrometry. When incorporated with a mass spectrometer the complete instrument is referred to as a spark ionization mass spectrometer or as a spark source mass spectrometer (SSMS).
Late-20th-century DNA sequencing changed lichen systematics, as it did the rest of biology. By the 1990s gene-specific sequencing (e.g., nuclear ribosomal DNA) was accessible, and lichenologists used it to probe deep relationships and test classical schemes. Initial studies centred on nuclear small-subunit rDNA (nuSSU), a slowly evolving gene found in all fungi. Andrea Gargas and co-workers (1995) compared nuSSU sequences from many fungi, including several lichens. Their data supplied the first clear evidence that lichenization arose independently multiple times. Lichen-forming fungi in the sample occupied at least five separate branches of the fungal tree. Three origins lay in the Basidiomycota—for example Omphalina and Multiclavula (mushroom-forming, algal partners) and Dictyonema (cyanobacterial partner). Two further origins occurred in the Ascomycota: one in the large ascolichen clade now placed in Lecanoromycetes, the other in Arthoniomycetes (e.g., some crustose Arthonia species). The pattern contradicted the view that lichens form a single natural group. Instead, 'lichen' is best seen as a functional category—an ecological strategy adopted by disparate fungal lineages. The study suggested that lichen-forming fungi evolved from saprotrophic or parasitic ancestors, not from a single ancestral lichen; some lineages later lost the symbiosis. In other words, the ability to form a lichen could evolve from a non-lichen state multiple times, and perhaps even be lost (as some primarily lichen-forming groups also include non-lichenized fungi).
The main isotopes of argon found on Earth are 40Ar (99.6%), 36Ar (0.34%), and 38Ar (0.06%). Naturally occurring 40K, with a half-life of 1.25×109 years, decays to stable 40Ar (11.2%) by electron capture or positron emission, and also to stable 40Ca (88.8%) by beta decay. These properties and ratios are used to determine the age of rocks by K–Ar dating. In Earth's atmosphere, 39Ar is made by cosmic ray activity, primarily by neutron capture of 40Ar followed by two-neutron emission. In the subsurface environment, it is also produced through neutron capture by 39K, followed by proton emission. 37Ar is created from the neutron capture by 40Ca followed by an alpha particle emission as a result of subsurface nuclear explosions. It has a half-life of 35 days. Between locations in the Solar System, the isotopic composition of argon varies greatly. Where the major source of argon is the decay of 40K in rocks, 40Ar will be the dominant isotope, as it is on Earth. Argon produced directly by stellar nucleosynthesis is dominated by the alpha-process nuclide 36Ar. Correspondingly, solar argon contains 84.6% 36Ar (according to solar wind measurements), and the ratio of the three isotopes 36Ar : 38Ar : 40Ar in the atmospheres of the outer planets is 8400 : 1600 : 1. This contrasts with the low abundance of primordial 36Ar in Earth's atmosphere, which is only 31.5 ppmv (= 9340 ppmv × 0.337%), comparable with that of neon (18.18 ppmv) on Earth and with interplanetary gasses, measured by probes.
===== Triple combination ===== The combination of metformin with dapagliflozin and saxagliptin is available in the United States as Qternmet XR. The combination of metformin with pioglitazone and glibenclamide is available in India as Accuglim-MP, Adglim MP, and Alnamet-GP; and in the Philippines as Tri-Senza. The combination of metformin with pioglitazone and lipoic acid is available in Turkey as Pional.
Sources: en.wikipedia.org
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.
It is prohibited by the World Anti-Doping Agency as a hormone and metabolic modulator. Athletes who test positive for GW501516 can face sanctions, including suspensions and loss of results.
Cardarine is a common or trade-style name, while GW501516 is the research code for the same chemical entity. Some sources also use Endurobol or GSK-516. The names refer to the same compound, not distinct drugs.
No. Cardarine has not received approval for human therapeutic use in major jurisdictions. It remains an investigational compound.