GW501516 raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-02-19. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Common internet and media name. |
| Research code | GW501516 | Also written GW-1516. |
| Drug class | PPARδ agonist | Not a selective androgen receptor modulator. |
| Development status | Discontinued | Clinical development halted after rodent cancer findings. |
| Regulatory status | Prohibited in sport | Listed by WADA; not approved as medicine. |
In laboratory settings, cardarine is studied as a tool compound for probing PPARδ biology. Published experiments often use cell cultures, rodent models, or isolated tissues. Some investigations focus on metabolic effects, while others assess potential risks such as carcinogenicity observed in long-term animal studies. Because human trials are sparse, most knowledge comes from preclinical work and adverse event reports. Scientific literature frequently notes the gap between animal findings and human outcomes. The compound is not a dietary supplement and is not intended for human consumption.
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.
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.
=== Elongation stages === Loading: Analogous to the starting stage, each module loads its specific amino acid onto its PCP-domain. Condensation: The C-domain catalyzes the amide bond formation between the thioester group of the growing peptide chain from the previous module with the amino group of the current module. The extended peptide is now attached to the current PCP-domain. Condensation-Cyclization: Sometimes the C-domain is replaced by a Cy-domain, which, in addition to the amide bond formation, catalyzes the reaction of the serine, threonine, or cysteine sidechain with the amide-N, thereby forming oxazolidines and thiazolidine, respectively. Epimerization: Sometimes an E-domain epimerizes the innermost amino acid of the peptide chain into the D-configuration. This cycle is repeated for each elongation module.
== Effects of consumption == The nature of effects will largely depend on the cultivar of the kava plant and the form of its consumption. Traditionally, only noble kava cultivars have been consumed, as they are accepted as safe and produce desired effects. The specific effects of various noble kavas depend on various factors, such as the cultivar used (and the related specific composition of kavalactones), age of the plant, and method of consumption. However, it can be stated that in general, noble kava produces a state of calmness, relaxation, and well-being without diminishing cognitive performance. Kava may produce an initial talkative period, followed by muscle relaxation and eventual sleepiness. The beverage has initial numbing and astringent effect in the mouth caused by the local anesthetic action of kavalactones and chewing it has local anesthetic effects similar to that of cocaine and longer lasting than benzocaine. As noted in one of the earliest Western publications on kava (1886): "A well prepared Kava potion drunk in small quantities produces only pleasant changes in behavior. It is therefore a slightly stimulating drink which helps relieve great fatigue. It relaxes the body after strenuous efforts, clarifies the mind and sharpens the mental faculties". Despite its psychoactive effects, kava is not considered to be physically addictive and its use does not lead to dependency.
Fascinated by the theories of Max Weber, Peukert began his last book with a quote from Weber who warned that the modern age would bring about "experts without spirit" and the "hedonist without a heart". Peukert went on to write about this modern age: "At its beginning there is immense loneliness and religious distress, which however help to bring about an unsuspected enhancement of the individual's attachment to this life, his rational control of the world and intellectual autonomy; at its end we may find routine "enslavement to the future", emptied of all meaning and causing the dynamic, expansive force of rationalization to ossify. In both cases, however, the growing pressure of suffering is the price paid for the gain in rationality". For Peukert, inspired by the theories of Weber, saw the purpose of his work to help foster experts who have spirit and hedonists with a heart.Though Peukert worked primarily as a historian (an occupation that has far greater prestige in Germany than it does in the English-speaking world), he also wrote about at times about literacy theory, philosophy, and anthropology. Peukert was also politically engaged, and his last essay written shortly before his death, Rechtsradikalismus in historischer Perspektive (Right-wing Radicalism in the Historical Perspective) warned against the rise of the party The Republicans led by the former SS-Unterscharführer Franz Schönhuber, which had some popular support in Germany with its call for a ban on Turkish "guest workers".
The diagnosis of cirrhosis in an individual is based on multiple factors. Cirrhosis may be suspected from laboratory findings, physical exam, and the person's medical history. Imaging is generally obtained to evaluate the liver. A liver biopsy will confirm the diagnosis; however, is generally not required.
Sources: en.wikipedia.org
Molecular chaperones are a class of proteins that aid in the correct folding of other proteins in vivo. Chaperones exist in all cellular compartments and interact with the polypeptide chain in order to allow the native three-dimensional conformation of the protein to form; however, chaperones themselves are not included in the final structure of the protein they are assisting in. Chaperones may assist in folding even when the nascent polypeptide is being synthesized by the ribosome. Molecular chaperones operate by binding to stabilize an otherwise unstable structure of a protein in its folding pathway, but chaperones do not contain the necessary information to know the correct native structure of the protein they are aiding; rather, chaperones work by preventing incorrect folding conformations. In this way, chaperones do not actually increase the rate of individual steps involved in the folding pathway toward the native structure; instead, they work by reducing possible unwanted aggregations of the polypeptide chain that might otherwise slow down the search for the proper intermediate and they provide a more efficient pathway for the polypeptide chain to assume the correct conformations. Chaperones are not to be confused with folding catalyst proteins, which catalyze chemical reactions responsible for slow steps in folding pathways. Examples of folding catalysts are protein disulfide isomerases and peptidyl-prolyl isomerases that may be involved in formation of disulfide bonds or interconversion between cis and trans stereoisomers of peptide group.
7-Eleven has a major presence in the Republic of Korea convenience store market, where it competes with CU, GS25 (formerly LG25), and independent competitors. There are 11,067 7-Eleven stores in the Republic of Korea; with only Japan and Thailand hosting more stores. The first 7-Eleven store in the Republic of Korea opened in May 1989 in Songpa-gu in Seoul with a franchise license under the Lotte Group. In January 2010, Lotte Group acquired the Buy the Way convenience store chain and rebranded its 1,000 stores under the 7-Eleven brand. In 2021, 7-Eleven announced that it would be working with a South Korean nonprofit to create jobs and franchising opportunities for North Korean defectors in South Korea. In January 2022, Lotte acquired the entire stake of Ministop Korea Co. for 313.37 billion won ($263 million). After acquisition, all the Ministop store were gradually converted to 7-Eleven.
==== Dentistry ==== Soviet dental technology and dental health were considered extremely bad; in 1991, the average 35-year-old had 12 to 14 cavities, fillings or missing teeth. Toothpaste was often not available, and toothbrushes did not conform to standards of modern dentistry.
Coombs test: Negative (rules-out autoimmune hemolytic anemia) Osmotic fragility test: Positive (Spherocytes will rupture in liquid solutions less concentrated than the inside of the red blood cell. This is due to increased permeability of the spherocyte membrane to salt and water, which enters the concentrated inner environment of the RBC and leads to its rupture. The osmotic fragility test is no longer considered the gold standard for diagnosing hereditary spherocytosis, as it misses ~25% of cases). Acidified glycerol lysis test: Positive (A newer version of the osmotic fragility test that adds glycerol to a hypotonic solution. This produces lysis, a positive test, quicker that the traditional saline version). Supportive blood work: Mean cell volume (MCV): Normocytic (normal range: 80–100 fL), or slightly lower. Spherocytes are slightly smaller than normal biconcave red blood cells. Mean corpuscular hemoglobin concentration (MCHC): Increased (normal range: 31–36% Hb/cell). This is secondary to less water being in the cell. MCHC can be normal when HS is combined with iron deficiency anaemia or thalassaemia. Red blood cell distribution width (RDW): Increased (normal range: 11–15%). The spherocytes create variation in the size of the red blood cells on average, thus expanding the distribution. Red blood cell count (RBC): Sometimes increased early (normal range males: 4.3–5.9 million/mm3; normal range females: 3.5–5.5 million/mm3). The loss of surface area per cells cause the body to mass-produce red blood cells. The spleen will filter spherocytes out and change this value.
==== Deuteron mass and radius ==== The deuterium nucleus is called a deuteron. It has a mass of 2.013553212544(15) Da (1875.61294500(58) MeV/c2). The charge radius of a deuteron is 2.12778(27)×10−15 m. Like the proton radius, measurements using muonic deuterium produce a smaller result: 2.12562(78) fm.
Sources: en.wikipedia.org
Cold Stone Creamery, Inc. is an American international ice cream parlor chain. Headquartered in Scottsdale, Arizona, the company is owned and operated by Kahala Brands. The company's main product is premium ice cream made with approximately 12–14% butterfat, made on location and customized for patrons at the time of order. Cold Stone has also expanded its menu with other ice cream-related products, including: ice cream cakes, pies, cookie sandwiches, smoothies, shakes, and iced or blended coffee drinks.
=== Improved mine safety === An ultrasonic bolt elongation monitor developed by a NASA scientist for testing tension and high-pressure loads on bolts and fasteners has continued to evolve over the past three decades. Today, the same scientist and Luna Innovations are using a digital adaptation of this same device for non-destructive evaluation (NDE) of railroad ties, groundwater analysis, radiation, and as a medical testing device to assess levels of internal swelling and pressure for patients with intracranial pressure and compartment syndrome, a painful condition that results when pressure within muscles builds to dangerous levels.
The actual preparation of the brew takes several hours, often taking place over the course of more than one day. After adding the plant material, each separately at this stage, to a large pot of water, it is boiled until the water is reduced by half in volume. The individual brews are then combined and brewed until reduced significantly, producing the form taken by participants in ayahuasca ceremonies.
=== T cell maturation === The thymus facilitates the maturation of T cells, an important part of the adaptive immune system, providing cell-mediated immunity. T cells begin as hematopoietic precursors from the bone marrow, and migrate to the thymus, where they are referred to as thymocytes. There, they mature, which involves ensuring the cells react against foreign antigens ("positive selection"), but do not react against antigens found on body tissue ("negative selection"). Once mature, T cells emigrate from the thymus to the rest of the body. Each T cell has a distinct T cell receptor, suited to a specific antigen. Most T cell receptors bind to the major histocompatibility complex (MHC) on cells. The MHC presents an antigen to the T cell receptor, which becomes active if they match. A mature T cell needs to bind to the MHC molecule ("positive selection"), and not to react against antigens that are from healthy tissues ("negative selection"). Positive selection occurs in the cortex, while negative selection occurs in the medulla. After this process, surviving T cells exit the thymus, regulated by sphingosine-1-phosphate. Further maturation occurs in the peripheral circulation. Some of this is because of hormones and cytokines secreted within the thymus, including thymulin, thymopoietin, and thymosins.
===== Licensed pharmaceutical manufacturers ===== Heroin and its production and distribution are strictly regulated by government health authorities and subject to international drug control treaties. In countries where medical diamorphine (heroin) is legal, a small number of licensed pharmaceutical manufacturers are authorized to produce diamorphine from morphine, which is derived from legally cultivated opium poppy. All manufacturing and handling are conducted by these licensed companies under close government oversight, operating under stringent national and international regulations. Their activities are monitored by agencies such as the International Narcotics Control Board (INCB), and the entire supply chain—from opium cultivation to the final pharmaceutical product—is subject to quotas, licensing, and detailed reporting requirements to prevent diversion to illicit markets.
Sources: en.wikipedia.org
No. Cardarine is a PPARδ agonist, while selective androgen receptor modulators act on androgen receptors. The two classes differ in receptor target and downstream effects.
Preclinical rodent studies reported cancers, including liver and bladder tumors, at tested doses. The human relevance of those findings is uncertain, but development was discontinued. No approved human product resulted.
No. It remains an investigational compound without approved therapeutic labeling. Sports regulators prohibit its use, and health agencies have warned against consuming it.
LC-MS/MS is common, often after sample cleanup. The assay targets GW501516 or its metabolites.