Everything below concerns unapproved substance. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-02-22. Numbers and descriptions here follow the published literature rather than marketing material.
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.
Sporting authorities added GW501516 to prohibited lists after it appeared in athlete samples and online markets. The World Anti-Doping Agency classifies it as a hormone and metabolic modulator, and its use can lead to an anti-doping rule violation. Some early laboratory work suggested effects on fatty acid oxidation and endurance-related metabolism in animals, but those findings do not establish safe or effective use in people. Reports of adverse events in humans are scarce and often anecdotal, which complicates risk assessment.
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.
Laboratory studies have examined GW501516 in cell cultures and rodents for conditions such as dyslipidemia, insulin resistance, and obesity. Some trials in humans were initiated, but development was discontinued after preclinical findings raised concerns about cancer in certain models. Those findings do not prove that the compound causes cancer in people, but they contributed to regulatory caution. Later reviews often describe the evidence as preliminary and insufficient for assessing long-term safety.
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.
| 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 |
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.
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.
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.
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.
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.
It was believed that after infants grow up, most of the mitochondria (which are responsible for the brown color) in brown adipose tissue disappear, and the tissue becomes similar in function and appearance to white fat. In rare cases, brown fat continues to grow, rather than involuting; this leads to a tumour known as a hibernoma. It is now known that brown fat is related not to white fat, but to skeletal muscle. Studies using positron emission tomography scanning of adult humans have shown that brown adipose tissue is still present in most adults in the upper chest and neck (especially paravertebrally). The remaining deposits become more visible (increasing tracer uptake, meaning more metabolically active) with cold exposure, and less visible if an adrenergic beta blocker is given before the scan. These discoveries could lead to new methods of weight loss, since brown fat takes calories from normal fat and burns it. Scientists have been able to stimulate brown fat growth in mice. One study of APOE knock out mice showed cold exposure could promote atherosclerotic plaque growth and instability. The study mice were subjected to sustained low temperatures of 4 °C for 8 weeks which may have caused a stress condition, due to rapid forced change rather than a safe acclimatisation, that can be used to understand the effect on adult humans of modest reductions of ambient temperature of just 5 to 10 °C.
"Borderline personality disorder". National Institute of Mental Health. APA DSM 5 Definition of Borderline personality disorder APA Division 12 treatment page for Borderline personality disorder Archived 21 April 2025 at the Wayback Machine Alternative DSM-5 Model for Personality Disorders (with AMPD definition of BPD) ICD-11 definition of Personality disorder, Borderline pattern by the World Health Organization NHS "Borderline Support UK".
A compromise solution was worked out whereas the infantry would attack north from both sides of Lake Ilmen, while the panzer group would advance from its current position. Hoepner's forces began their advance on August 8, but the attack ran into determined Soviet defences. Elsewhere, Soviet counter-attacks threatened Leeb's southern flank. By mid to late August, the German forces were making gains again, with the 4th Panzer Group taking Narva on 17 August. On 29 August, Leeb issued orders for the blockade of Leningrad in anticipation that the city would soon be abandoned by the Soviets. On September 5, Hitler ordered Hoepner's 4th Panzer Group and an air corps transferred to Army Group Centre effective 15 September, in preparation for Operation Typhoon, the German assault on Moscow. Leeb objected and was given a reprieve in the transfer of his mobile forces, with the view of making one last push towards Leningrad. The 4th Panzer Group was to be the main attacking force, which reached south of the Neva River, where it was faced with strong Soviet counter-attacks. By 24 September, Army Group North halted its advance and transferred the 4th Panzer Group to Army Group Centre.
. Magnetization as a function of time is defined by the Bloch equations. T1 and T2 values are dependent on the chemical environment of the sample; hence their utility in MRI. Soft tissue and muscle tissue relax at different rates, yielding the image contrast in a typical scan. The standard display of MR images is to represent fluid characteristics in black-and-white images, where different tissues turn out as follows:
Sources: en.wikipedia.org
Selection is the choice of relevant tissue in cases where it is not necessary to put the entire original tissue mass through further processing. The remainder may remain fixed in case it needs to be examined at a later time. Trimming is the cutting of tissue samples in order to expose the relevant surfaces for later sectioning. It also creates tissue samples of appropriate size to fit into cassettes.
=== Nutrition === One hundred grams of milk chocolate supplies 540 calories. It is 59% carbohydrates (52% as sugar and 3% as dietary fiber), 30% fat and 8% protein (table). Approximately 65% of the fat in milk chocolate is saturated, mainly palmitic acid and stearic acid, while the predominant unsaturated fat is oleic acid (table). One hundred grams of milk chocolate is an excellent source (over 19% of the Daily Value, DV) of riboflavin, vitamin B12 and the dietary minerals manganese, phosphorus and zinc. Chocolate is a good source (10–19% DV) of calcium, magnesium and iron.
== Pharmacology == Corticosteroids act as agonists of the glucocorticoid receptor and/or the mineralocorticoid receptor. In addition to their corticosteroid activity, some corticosteroids may have some progestogenic activity and may produce sex-related side effects.
=== Traumatic === Frictional keratosis: This typically presents as white plaques on the oral mucosa due to mechanical trauma. When the cause of frictional keratosis is removed the white patch may resolve. Hyperplastic reactive lesions or nodular swellings: These occur in the oral mucosa due to low grade inflammation or trauma. They develop where the mucosa is subjected to chronic minor irritants, mechanical or infective. They most frequently occur on the buccal mucosa (inner cheek) along the occlusal line where the teeth meet and the gingivae (the mucosa which covers the gums); reactive nodules occurring here are specifically categorised as epulides instead of polyps. Also the alveolar ridge (the gum where the teeth erupt up from, or if missing, where they used to be) and the hard palate (roof of the mouth). The most common are fibrous nodules called fibroepithelial polyps and epulides. Other hyperplastic reactive hyperplastic lesions include those associated with dentures, and papillomas. However, they are all similar in cause and nature, the overproduction of the cells of the mucosa, primarily the epithelial cells, also fibrous myxoid and low inflamed tissue due to irritation. Fibroepithelial polyps are usually pale, firm to touch, and painless but further irritation can cause abrasion and then ulceration or bleeding. They are sometimes be called fibroma, such as leaf fibroma, a fibroepithelial polyp often occurring under a denture and appears flattened.
Medical societies and professional guidelines recommend that the physician confirm a person is at high risk for Chronic Coronary Syndrome before conducting diagnostic non-invasive imaging tests to make a diagnosis, as such tests are unlikely to change management and result in increased costs. Patients who have a normal ECG and who are able to exercise, for example, most likely do not merit routine imaging.
Sources: en.wikipedia.org
PD-L1, an immunosuppressive PD-1 ligand, is highly expressed in several cancers; the role of PD-1 in cancer immune evasion is well established. Monoclonal antibodies targeting PD-1 that boost the immune system are being developed for the treatment of cancer. Inhibition of the interaction between PD-1 and PD-L1 can enhance T-cell responses in vitro and mediate preclinical antitumor activity. This is known as immune checkpoint blockade. PD-1 is expressed intrinsically in some tumor cells, such as melanoma, where it promotes tumor growth independently of the immune system. Inhibition of tumor cell-intrinsic PD-1 suppresses tumor growth, whereas overexpression or engagement by PD-L1 enhances tumorigenicity. Combination therapy using both anti-PD1 along with anti-CTLA4 therapeutics have emerged as important tumor treatments within the field of checkpoint inhibition. The effects of the two antibodies has been shown to be more effective than either antibody alone and does not appear to be redundant. Anti-CTLA4 treatment leads to an enhanced antigen specific T cell dependent immune reaction while anti-PD-1 appears to reactivate CD8+ T cells ability to lyse cancer cells. In clinical trials, combination therapy has been shown to be effective in reducing tumor size in patients that are unresponsive to single co-inhibitory blockade, despite increasing levels of toxicity due to anti-CTLA4 treatment. A combination of PD1 and CTLA4 induced up to a ten-fold higher number of CD8+ T cells that are actively infiltrating the tumor tissue.
== Clinical significance == Anti-nRNP antibodies are most strongly associated with Mixed Connective Tissue Disease (MCTD), a condition that exhibits overlapping symptoms with systemic lupus erythematosus (SLE), scleroderma, and rheumatoid arthritis. The detection of high titers of anti-U1 snRNP antibodies in the sera of patients is considered a hallmark of MCTD and is commonly used in its diagnosis. In addition to MCTD, anti-nRNP antibodies have been observed in a variety of other autoimmune disorders including:
== See also == Breaking Bad – TV drama series centered on illicit methamphetamine synthesis Drug checking – Harm reduction technique Faces of Meth – Drug prevention project Famprofazone – Non-steroidal anti-inflammatory drug yielding methamphetamine as a major metabolite Harm reduction – Public health policies which lessen negative aspects of problematic activities Methamphetamine and Native Americans Methamphetamine in Australia Methamphetamine in Bangladesh – Illegal mix of methamphetamine and caffeine Methamphetamine in the Philippines Methamphetamine in the United States Montana Meth Project – Montana-based organization aiming to reduce meth use among teenagers Recreational drug use – Use of drugs with the primary intention to alter the state of consciousness Rolling meth lab – A transportable laboratory that is used to illegally produce methamphetamine Ya ba – Southeast Asian tablets containing a mixture of methamphetamine and caffeine
== Sculptra used in cosmetic medicine == Today, Sculptra is used "off label" for other aesthetic enhancements, such as a non-surgical butt lift, alongside a wide range of anatomical regions of the body for overall rejuvenatory effects.
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.
It binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.