PPARδ agonist 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.
Last reviewed on 2025-08-21. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
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.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516, GW-501516, GW 501516, endurobol | Names vary in research and anti-doping documents. |
| Chemical class | Synthetic PPARδ agonist | Small-molecule nuclear receptor ligand. |
| CAS Registry Number | 317318-70-0 | Identifier commonly associated with GW501516. |
| Appearance | White to off-white powder | Typical for purified research material. |
| Solubility | Low in water; soluble in DMSO and ethanol | Organic solvents are common for laboratory stock solutions. |
==== Psychiatry and neuropsychopharmacology ==== Numerous compounds that bind selectively to neuroreceptors of interest in biological psychiatry have been radiolabeled with C-11 or F-18. Radioligands that bind to dopamine receptors (D1, D2, reuptake transporter), serotonin receptors (5HT1A, 5HT2A, reuptake transporter), opioid receptors (mu and kappa), cholinergic receptors (nicotinic and muscarinic) and other sites have been used successfully in studies with human subjects. Studies have been performed examining the state of these receptors in patients compared to healthy controls in schizophrenia, substance abuse, mood disorders and other psychiatric conditions.
=== Other lymphoid tissue === Lymphoid tissue associated with the lymphatic system is concerned with immune functions in defending the body against infections and the spread of tumours. It consists of connective tissue formed of reticular fibers, with various types of leukocytes (white blood cells), mostly lymphocytes enmeshed in it, through which the lymph passes. Regions of the lymphoid tissue that are densely packed with lymphocytes are known as lymphoid follicles. Lymphoid tissue can either be structurally well organized as lymph nodes or may consist of loosely organized lymphoid follicles known as the mucosa-associated lymphoid tissue (MALT). The central nervous system also has lymphatic vessels. The search for T cell gateways into and out of the meninges uncovered functional meningeal lymphatic vessels lining the dural sinuses, anatomically integrated into the membrane surrounding the brain.
=== Emergency treatment === Acute methamphetamine intoxication is largely managed by treating the symptoms and treatments may initially include administration of activated charcoal and sedation. There is not enough evidence on hemodialysis or peritoneal dialysis in cases of methamphetamine intoxication to determine their usefulness. Forced acid diuresis (e.g., with vitamin C) will increase methamphetamine excretion but is not recommended as it may increase the risk of aggravating acidosis, or cause seizures or rhabdomyolysis. Hypertension presents a risk for intracranial hemorrhage (i.e., bleeding in the brain) and, if severe, is typically treated with intravenous phentolamine or nitroprusside. Blood pressure often drops gradually following sufficient sedation with a benzodiazepine and providing a calming environment. Antipsychotics such as haloperidol are useful in treating agitation and psychosis from methamphetamine overdose. Beta blockers with lipophilic properties and CNS penetration such as metoprolol and labetalol may be useful for treating CNS and cardiovascular toxicity. The mixed alpha- and beta-blocker labetalol is especially useful for treatment of concomitant tachycardia and hypertension induced by methamphetamine. The phenomenon of "unopposed alpha stimulation" has not been reported with the use of beta-blockers for treatment of methamphetamine toxicity.
Because the line of dinosaurs that includes Allosaurus and Tyrannosaurus diverged from the line that led to Tenontosaurus very early in the evolution of dinosaurs, this suggests that the production of medullary tissue is a general characteristic of all dinosaurs.
Sources: en.wikipedia.org
== Advocacy == Prior to gaining mainstream attention, Saladino was vegan. As an advocate of the strict meat only carnivore diet, Saladino argued that the diet could "cure everything ranging from depression to autoimmune conditions", and claimed that the diet cured his anxiety and eczema. He transitioned away from a strict carnivore diet by 2020 by adding carbohydrates to his diet, including fruit and honey. While on the carnivore diet, Saladino reported experiencing sleep disturbances, heart palpitations, muscle cramps, and a drop in testosterone levels. He said: "I started to think, maybe long-term ketosis is not great for me" and "probably not a great thing for most humans". Saladino's content often features him vlogging and presenting lifestyle advice and his personal routine, in scenarios varying from supermarket trips to surfing on his Costa Rican estate. He promotes the consumption of animal organs, claiming they help immunity, gut health, weight loss and bone strength. Saladino has urged his followers to use a bidet instead of toilet paper, claiming that toilet paper is "filled with hormone disrupting compounds" and that he avoids contact with them to "protect" his "hormonal health". According to Vice.com, during the Coronavirus pandemic, he was increasingly dismissive of the efficacy of vaccines contrary to mainstream scientific opinion, although saying they "may help avoid some severe COVID-19 complications." However, he asserted that "metabolic health" and "natural immunity" are more effective, also against medical consensus.
== Diagnosis == There are a few ways to diagnose Donohue syndrome. Due to the nature of the disorder, Donohue syndrome can be diagnosed either genetically, symptomatically, or both. Because Donohue syndrome is a genetic disorder, genetic testing can be performed to diagnose the disease. These genetic tests include diagnostic testing, carrier testing, predictive and pre-symptomatic testing, as well as forensic testing. Prenatally, amniocentesis can be performed to determine if the child will have Donohue syndrome. Additionally, the disorder can be diagnosed through laboratory testing to measure blood insulin levels and defective insulin receptors.
== Trials == Howard Florey's team at Oxford showed that Penicillium extract killed many kinds of bacteria. Gardner and Orr-Ewing tested it against gonococcus (against which it was most effective), meningococcus, streptococcus, staphylococcus, Bacillus anthracis, actinomyces and tetanus bacterium (Clostridium tetani) and the bacteria that cause gangrene. They observed bacteria attempting to grow in the presence of penicillin, and noted that penicillin was neither an enzyme that broke the bacteria down, nor an antiseptic that killed them; rather, it was a chemical that interfered with the process of cell division. Jennings observed that it had no effect on white blood cells, and would therefore reinforce rather than hinder the body's natural defences against bacteria. She also found that unlike sulphonamides, the first and only effective broad-spectrum antibiotic available at the time, it was not destroyed by pus. Medawar found that it did not affect the growth of tissue cells.
In 2007, US Fleet Tracking provided live GPS tracking to Gameday Management Group for use at the Super Bowl, tracking AFC and NFC Team buses, media buses, press buses, halftime entertainers, team owners and team family limousines, and other critical assets. US Fleet Tracking continues to provide these services for the Super Bowl each year, as it has each year since 2007 (through 2020). In 2013, US Fleet Tracking sponsored the FLS Microjet for its appearance at the EAA AirVenture Oshkosh airshow in Oshkosh, Wisconsin. The company demonstrated its live tracking technology at the event by installing its proprietary GPS equipment on the FLS Microjet and allowing the public to follow the course of the aircraft via a website in real time during the exhibition.
=== Signalling === Zinc has been recognized as a messenger, able to activate signalling pathways. Many of these pathways provide the driving force in aberrant cancer growth. They can be targeted through ZIP transporters.
Sources: en.wikipedia.org
Venezuelan Trotskyist organisations do not regard Chávez as a Trotskyist, with some describing him as a bourgeois nationalist, while others consider him an honest revolutionary leader who made significant mistakes due to him lacking a Marxist analysis. For Italian Marxist Gianni Vattimo and Santiago Zabala in their 2011 book Hermeneutic Communism, "this new weak communism differs substantially from its previous Soviet (and current Chinese) realisation, because the South American countries follow democratic electoral procedures and also manage to decentralise the state bureaucratic system through the Bolivarian missions. In sum, if weakened communism is felt as a spectre in the West, it is not only because of media distortions but also for the alternative it represents through the same democratic procedures that the West constantly professes to cherish but is hesitant to apply." The fidelity of those varied revolutionaries, leaders and parties to the work of Karl Marx is highly contested and has been rejected by many Marxists and other socialists alike. Socialists in general and socialist writers, including Dimitri Volkogonov, acknowledge that the actions of authoritarian socialist leaders have damaged "the enormous appeal of socialism generated by the October Revolution."
=== Potential future usage === AMH has been synthesized. Its ability to inhibit growth of tissue derived from the Müllerian ducts has raised hopes of usefulness in the treatment of a variety of medical conditions including endometriosis, adenomyosis, and uterine cancer. Research is underway in several laboratories. If there were more standardized AMH assays, it could potentially be used as a biomarker of polyendocrine metabolic ovarian syndrome. In mice, an increase in AMH has been shown to reduce the number of growing follicles and thus the overall size of the ovaries. This increase in AMH production reduces primary, secondary and antral follicles without reducing the number of primordial follicles suggesting a blockade of primordial follicle activation. This may provide a viable method of contraception which protects the ovarian reserve of oocytes during chemotherapy without extracting them from the body allowing the potential for natural reproduction later in life.
curves to cross over at different points, as illustrated. In this case, morph B crystals are energetically favored when small, but for a large enough crystal, morph A is energetically favored. This means that during crystallization, morph B tends to appear first, which then may grow without bound—that is, morph B is kinetically favored. However, it is a metastable crystal. If a seed crystal of morph A above the crossover radius
Cresskill is governed under the borough form of New Jersey municipal government, which is used in 218 municipalities (of the 564) statewide, making it the most common form of government in New Jersey. The governing body is comprised of the mayor and the borough council, with all positions elected at-large on a partisan basis as part of the November general election. A mayor is elected directly by the voters to a four-year term of office. The borough council includes six members elected to serve three-year terms on a staggered basis, with two seats coming up for election each year in a three-year cycle. The borough form of government used by Cresskill is a "weak mayor / strong council" government in which council members act as the legislative body with the mayor presiding at meetings and voting only in the event of a tie. The mayor can veto ordinances subject to an override by a two-thirds majority vote of the council. The mayor makes committee and liaison assignments for council members, and most appointments are made by the mayor with the advice and consent of the council. As of 2026, the mayor of the Borough of Cresskill is Republican John Morgan, who was appointed to serve a term of office ending on December 31, 2027. Members of the Cresskill Borough Council are Saverio Costa (R, 2028), Cheryl Furio (R, 2028), Arthur J. McLaughlin (D, 2026), Hector Olmo (R, 2026), Kathleen Savas (D, 2027), and Kathy M. Schultz-Rummel (R, 2027).
Hybrids are offspring resulting from the breeding of two genetically distinct individuals, which usually will result in a high degree of heterozygosity, though hybrid and heterozygous are not synonymous. The deliberate or accidental hybridizing of two or more species of closely related animals through captive breeding is a human activity which has been in existence for millennia and has grown for economic purposes. Hybrids between different subspecies within a species (such as between the Bengal tiger and Siberian tiger) are known as intra-specific hybrids. Hybrids between different species within the same genus (such as between lions and tigers) are known as interspecific hybrids or crosses. Hybrids between different genera (such as between sheep and goats) are known as intergeneric hybrids. Natural hybrids will occur in hybrid zones, where two populations of species within the same genera or species living in the same or adjacent areas will interbreed with each other. Some hybrids have been recognized as species, such as the red wolf (though this is controversial). Artificial selection, the deliberate selective breeding of domestic animals, is being used to breed back recently extinct animals in an attempt to achieve an animal breed with a phenotype that resembles that extinct wildtype ancestor. A breeding-back (intraspecific) hybrid may be very similar to the extinct wildtype in appearance, ecological niche and to some extent genetics, but the initial gene pool of that wild type is lost forever with its extinction.
Sources: en.wikipedia.org
Cardarine is an investigational synthetic compound that acts as a PPARδ agonist. It is also known as GW501516 and has been studied mainly in preclinical research. It is not an approved medicine.
No. Cardarine is not a steroid hormone; it targets the nuclear receptor PPARδ. Its classification in anti-doping rules differs from anabolic steroids, though it remains prohibited in sport.
Early rodent studies reported tumor formation at multiple sites, which raised safety concerns. Sponsors stopped clinical development, and no approved human product exists.
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.