LC-MS/MS raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2025-12-15. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
| 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. |
Anti-doping laboratories identify GW501516 and related metabolites using liquid chromatography coupled with tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be analyzed. The method targets the parent compound and phase I and phase II metabolites, which extend the detection window. Because the substance is prohibited at all times, athletes can be tested outside competition. Detection limits and windows depend on the assay, sample type, and individual metabolism.
Cardarine is frequently described as a fat-burning or endurance-enhancing supplement, but these claims exceed the available evidence. The compound is not a hormone, steroid, or selective androgen receptor modulator. Research articles discuss it as a tool compound for studying PPARδ biology, while anti-doping literature focuses on its abuse and detection. Quality of unapproved products is uncertain, and independent analyses have found impurities or incorrect labeling. Open questions include whether human cancer risk resembles that seen in rodents and how often non-athletes use the substance.
GW501516 acts as a ligand for PPAR delta, a nuclear receptor that regulates transcription of genes involved in fatty acid oxidation and energy use. Activation of this receptor in skeletal muscle shifts metabolism toward fat burning in animal models. The compound does not burn fat directly; it changes gene expression over hours to days. Researchers study it to understand metabolic flexibility and exercise adaptation. Effects observed in rodents are not automatically expected in humans.
Preclinical research reported that GW501516 increased running endurance in mice and improved lipid profiles in some animal species. Early human trials explored effects on high-density lipoprotein cholesterol, triglycerides, and glucose handling, but the program was discontinued. Published human data are sparse and do not establish efficacy for any condition. Studies also examined PPAR delta in cancer biology, with conflicting findings across models. The relationship between receptor activation, tissue context, and disease risk remains an active area of investigation.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
The pharmacological interest in cardarine centers on PPARδ activation and its downstream effects on lipid handling and mitochondrial function. In animal studies, PPARδ agonists have been associated with changes in exercise endurance and fatty acid utilization, though results vary by model and protocol. Human data remain sparse, and the absence of large controlled trials limits conclusions about efficacy. Researchers often describe the compound as a tool for probing PPARδ biology rather than a proven therapeutic agent.
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
=== Civil servants === The government increased by 9%, starting in May 2023, the remuneration of civil servants and civilian public employees of the Federal Executive Branch, with an estimated annual cost of about 14 billion reais, and increased by 200 reais the meal allowance paid to active servants and employees. Civil servants of the other branches received an increase at a higher rate (18%), staggered in three installments until 2025. The salary cap of the public service became 41,650 reais starting in April 2023, and will be 44,008 reais in February 2024 and 46,366 reais in February 2025. The federal government also created 665 new commissioned positions, with remuneration of up to 14,849 reais, and 1,578 commissioned functions, with compensation of up to 8,909 reais. Commissioned positions do not need to be occupied by career civil servants, unlike commissioned functions, which can only be occupied by those who are already public servants and which add the value of the function's compensation to the remuneration. The Concurso Público Nacional Unificado (CPNU), also called the Concurso Nacional Unificado (CNU), is an initiative of the Ministry of Management and Innovation in Public Services (MGI) of the Federal government of Brazil to centralize and streamline the process of hiring new federal civil servants.
SR-16435 is a drug which acts as a potent partial agonist at both the μ-opioid receptor and nociceptin receptor. In animal studies it was found to be a potent analgesic, with results suggestive of reduced development of tolerance and increased activity against neuropathic pain compared to classic μ-selective agonists.
As well as with dim sum, many Chinese drink their tea with snacks such as nuts, plums, dried fruit (in particular jujube), small sweets, melon seeds, and waxberry. China was the earliest country to cultivate and drink tea, which is enjoyed by people from all social classes. Tea processing began after the Qin and Han dynasties. The different types of Chinese tea include red (known as "black tea" outside of East Asia), white, green, yellow, oolong, and black (often called "dark tea" in English to differentiate it from "black tea"). Chinese tea is often classified into several different categories according to the variety of the tea plant from which it is sourced, the region in which it is grown, and the method of production used. Flavored and scented teas originated in China. Jasmine, osmanthus, chrysanthemum, and ginseng are popular varieties. Historically, compressed tea dominated and powdered tea known as matcha would be made from it. This was later supplanted by loose-leaf tea. Fermented tea drinks like kombucha are believed to originate in China, but kombucha is now better known outside of China than within the country. There are four major tea plantation regions: Jiangbei, Jiangnan, Huanan and the southwestern region. Well known types of green tea include Longjing, Huangshan Maofeng, Bilochun, Putuofeng Cha, and Liu'an Guapian. China is the world's largest exporter of green tea. One of the most ubiquitous accessories in modern China, after a wallet or purse and an umbrella, is a double-walled insulated glass thermos with tea leaves in the top behind a strainer.
July 30, 2020: Law protecting victims of domestic violence. September 23, 2020: A mobile electronic anti-approach device is implemented by decree to remotely monitor violent spouses or ex-spouses. 2021: Year of the Generation Equality Forum of the United Nations (UN), co-organized and hosted by Mexico in the spring and by France at the end of June and beginning of July. December 24, 2021: Law no. 2021-1774 aimed at accelerating economic and professional equality, known as the "Rixain law."
== Structures involved in clinical attachment loss == Clinical attachment loss refers to the apical migration and destruction of the tissues that secure the tooth within the periodontium. This process involves the coordinated breakdown of epithelial, connective tissue, and osseous components that collectively form the periodontal attachment apparatus.
Sources: en.wikipedia.org
== Causes == Myositis can arise from various causes, including injury, certain medications, infections, inherited muscle disorders, or autoimmune conditions. In some instances, the origins of myositis remain idiopathic, without a discernible cause.
Like the Aztecs, the Pueblo, Navajo and Apache tribes cherished turquoise for its amuletic use; the latter tribe believe the stone to afford the archer dead aim. In Navajo culture it is used for "a spiritual protection and blessing." Among these peoples turquoise was used in mosaic inlay, in sculptural works, and was fashioned into toroidal beads and freeform pendants. The Ancestral Puebloans (Anasazi) of the Chaco Canyon and surrounding region are believed to have prospered greatly from their production and trading of turquoise objects. The distinctive silver jewellery produced by the Navajo and other Southwestern Native American tribes today is a rather modern development, thought to date from around 1880 as a result of European influences. In Persia, turquoise was the de facto national stone for millennia, extensively used to decorate objects (from turbans to bridles), mosques, and other important buildings both inside and out, such as the Medresseh-i Shah Husein Mosque of Isfahan. The Persian style and use of turquoise was later brought to India following the establishment of the Mughal Empire there, its influence seen in high purity gold jewellery (together with ruby and diamond) and in such buildings as the Taj Mahal. Persian turquoise was often engraved with devotional words in Arabic script which was then inlaid with gold. Cabochons of imported turquoise, along with coral, was (and still is) used extensively in the silver and gold jewellery of Tibet and Mongolia, where a greener hue is said to be preferred.
The colour of a salt is often different from the colour of an aqueous solution containing the constituent ions, or the hydrated form of the same compound. The anions in compounds with bonds with the most ionic character tend to be colorless (with an absorption band in the ultraviolet part of the spectrum). In compounds with less ionic character, their color deepens through yellow, orange, red, and black (as the absorption band shifts to longer wavelengths into the visible spectrum). The absorption band of simple cations shifts toward a shorter wavelength when they are involved in more covalent interactions. This occurs during hydration of metal ions, so colorless anhydrous salts with an anion absorbing in the infrared can become colorful in solution. Salts exist in many different colors, which arise either from their constituent anions, cations or solvates. For example:
== External links == Target+Peptide at the U.S. National Library of Medicine Medical Subject Headings (MeSH) SPdb (Signal Peptide DataBase) Archived 2016-01-22 at the Wayback Machine Prediction methods: SignalP — predicts the presence and location of signal peptide cleavage sites in amino acid sequences from all domains of organisms. PHOBIUS - combined transmembrane topology and signal peptide predictor
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.
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.