Everything below concerns fatty acid oxidation. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2026-04-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
GW501516 acts as an agonist at the peroxisome proliferator-activated receptor delta, a nuclear receptor that regulates gene expression. Activation shifts transcription toward genes involved in fatty acid uptake, oxidation, and energy expenditure. The compound does not bind the androgen receptor and therefore differs from anabolic steroids and SARMs. In rodent models, this metabolic shift has been linked to increased running endurance and reduced fat accumulation. The exact downstream pathways in humans remain incompletely characterized.
Early clinical research explored GW501516 for lipid disorders, obesity, and diabetes. Some short-term human studies reported changes in HDL cholesterol, LDL cholesterol, and triglycerides. The development program was discontinued after rodent studies showed dose-dependent tumor formation in multiple tissues, including liver, bladder, stomach, and skin. These findings raised concerns about long-term cancer risk in humans. Because human exposure data are limited, the clinical significance of the rodent tumors remains uncertain.
Literature on cardarine often separates receptor pharmacology from toxicology. Mechanistic papers describe PPARδ activation and gene expression changes, while safety assessments focus on carcinogenicity and species differences. Questions remain about whether rodent tumors arise through PPARδ-dependent or off-target mechanisms. Another open area is how human metabolism and exposure compare with those in animal studies. Analytical methods such as liquid chromatography–mass spectrometry are used to confirm identity in biological and product samples.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Primary target | PPARδ | Nuclear receptor; not androgen receptor |
| Studied indications | Dyslipidemia; obesity; diabetes | Early clinical research; development discontinued |
| Rodent toxicity | Tumor formation in multiple tissues | Dose-dependent findings in some studies |
| Human approval | None | No approved therapeutic use |
| Typical analytical method | LC-MS/MS | Used for identity and quantification |
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
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.
== Side effects == Common or clinically important adverse effects of phenelzine include orthostatic hypotension, dizziness, dry mouth, constipation, urinary retention, sedation or somnolence, insomnia, weight gain, edema, sweating, sexual dysfunction, and reduced vitamin B6 levels or pyridoxine deficiency. Hypoglycemia and clinically relevant cytochrome P450 interactions may also occur, particularly with hydrazine MAOIs such as phenelzine. Rare adverse effects reported with phenelzine include hypomania or mania, psychosis, hepatotoxicity, and acute liver failure, the last of which has been reported mainly in susceptible individuals, including people with pre-existing liver damage, old age, long-term effects of alcohol consumption, or viral infection.
CD98 is a glycoprotein that is a heterodimer composed of SLC3A2 and SLC7A5 that forms the large neutral amino acid transporter (LAT1). LAT1 is a heterodimeric membrane transport protein that preferentially transports branched-chain (valine, leucine, isoleucine) and aromatic (tryptophan, tyrosine, phenylalanine) amino acids. LAT is highly expressed in brain capillaries (which form the blood–brain barrier) relative to other tissues. A functional LAT1 transporter is composed of two proteins encoded by two distinct genes:
== Fourier transform mass spectrometry == Fourier transform ion cyclotron resonance mass spectrometry was developed by Alan G. Marshall and Melvin B. Comisarow at the University of British Columbia in 1974. The inspiration was earlier developments in conventional ICR and Fourier Transform Nuclear Magnetic Resonance (FT-NMR) spectroscopy.
Specialized variants of field rations may exist for different environments, situations, and roles, such as cold-weather warfare, mountain warfare, jungle warfare, desert warfare, long-range reconnaissance patrols, and vehicle crew variants. The meals offered in a field ration often come in multiple different "menus" (varieties) predominantly featuring foods from a military's national or traditional cuisine—and, if diverse enough and possible under the constraints of a field ration, fusion cuisine such as soul food or Anglo-Indian cuisine—intended to evoke the "taste of home" while on deployment or away. Some rations include commercially available items, often snacks such as Tootsie Rolls, Charms, and Yorkie bars. However, basic or less-accommodating rations (usually emergency rations) may consist of very simple meals intended to provide enough nutrients and energy to keep a soldier combat-ready or alive, like compressed food bars. Field rations are commonly issued to land forces such as armies, marines, and air force ground forces, who may spend lengthy periods of time away from fixed food sources. Navies and air forces are not commonly issued field rations as they are closely attached to the rear or steady supplies of food, prepared in galleys aboard naval vessels and flight kitchens at air bases. Rations may still be issued to personnel in certain situations or roles, like long-range flight rations for bomber, transport, and reconnaissance aircraft crews, who could otherwise spend hours in flight without food.
Sources: en.wikipedia.org
There are a number of different types of actin with slightly different structures and functions. α-actin is found exclusively in muscle fibres, while β- and γ-actin are found in other cells. As the latter types have a high turnover rate the majority of them are found outside permanent structures. Microfilaments found in cells other than muscle cells are present in three forms:
=== As punishment === In some situations, people's hair is shaved as a punishment or a form of humiliation. After World War II, head-shaving was a common punishment in France, the Netherlands, and Norway for women who had collaborated with the Nazis during the occupation, and, in particular, for women who had sexual relations with an occupying soldier. In the United States, during the Vietnam War, conservative students would sometimes attack student radicals or "hippies" by shaving beards or cutting long hair. One notorious incident occurred at Stanford University, when unruly fraternity members grabbed Resistance founder (and student-body president) David Harris, cut off his long hair, and shaved his beard. During European witch-hunts of the Medieval and Early Modern periods, alleged witches were stripped naked and their entire body shaved to discover the so-called witches' marks. The discovery of witches' marks was then used as evidence in trials. Inmates have their heads shaved upon entry at certain prisons.
Thiamine: Thiamine acts as an essential cofactor in glucose metabolism, therefore, it may modulate diabetic complications by controlling glycemic status in diabetic patients. Additionally, deficiency of thiamine was observed to be associated with dysfunction of β-cells and impaired glucose tolerance. Different studies indicated possible role of thiamin supplementation on the prevention or reversal of early stage diabetic nephropathy, as well as significant improvement on lipid profile.
Sources: en.wikipedia.org
=== No development reported === AB-1224 – microbiome modulator AGX-201 (histamine dihydrochloride salt) – histamine H1 receptor antagonist and histamine H3 receptor agonist Aminolevulinic acid/sodium ferrous citrate (5-ALA-SFC, 5-ALA/SFX; sodium ferrous citrate/aminolevulinic acid; SPP-003) – erythropoiesis stimulant and photosensitizer Aripiprazole transdermal (AQS-1301; transdermal aripiprazole) – dopamine D2 and D3 receptor partial agonist, serotonin 5-HT1A and 5-HT7 receptor partial agonist, serotonin 5-HT2A and 5-HT2B receptor antagonist or inverse agonist, and atypical antipsychotic BAER-101 (AZ-7325; AZD-7325) – selective GABAA α2 and α3 subunit-containing receptor positive allosteric modulator BBP-472 – phosphatidylinositol 3 kinase β (PI3Kβ) inhibitor Fasoracetam co-crystallised (co-crystallised fasoracetam; AEVI-004) – various actions and racetam Guanfacine once-daily (Guanfacine Carrier Wave; SPD-547) – α2-adrenergic receptor agonist KBLP-010 – bacteria replacement and microbiome modulator Oxytocin intranasal (OPN-300; OptiNose oxytocin) – oxytocin receptor agonist Research programme: allosteric modulators - Addex Therapeutics (various) – various actions Research programme: antisense oligonucleotide therapeutics - RogCon U.R (RCUR-313, RCUR-SMP) – voltage-gated sodium channel Nav1.2 expression stimulants Research programme: autism and obesity therapeutics - Berand Neuropharmacology – histone deacetylase inhibitors Research programme: brain development disorder therapeutics - Seaside Therapeutics (STX-110) – metabotropic glutamate mGlu5 receptor antagonists and muscarinic acetylcholine M1 receptor antagonists Research programme: cannabinoid receptor modulators - GW Pharmaceuticals (cannabigerol; CBG) – cannabinoid receptor modulators Research programme: cannabis extract therapeutics - Cannabis Science (CBIS compounds) – cannabinoid receptor modulators Research programme: central nervous system therapeutics - AbbVie/Rugen – undefined mechanism of action Research programme: CNS disorder therapeutics - Promentis Pharmaceuticals – antioxidants, glutamate receptor modulators, SLC7A11 modulators Research programme: CNS disorders therapeutics - Sage Therapeutics (SAGE-105; SGE-202; SGE-301; SGE-516) – GABAA receptor modulators and ionotropic glutamate NMDA receptor modulators Research programme: G protein-coupled receptor modulating small molecules - Omeros Corporation – G protein-coupled receptor modulator and neuromedin U receptor modulator Research programme: GPCR modulators - Nxera Pharma – various actions Research programme: immunomodulating bacteria-based therapeutics - 4D Pharma – bacteria replacements Research programme: metabotropic glutamate receptor 5 antagonists - Roche/Seaside Therapeutics – metabotropic glutamate mGlu5 receptor antagonists Research programme: oxytocin intranasal - Pastorus Pharma – neurotransmitter modulators/oxytocin receptor agonists Research programme: therapeutic autoantibodies - Sengenics – undefined mechanism of action RG-7713 (RG7713) – vasopressin V1A receptor antagonist Tideglusib (AMO-02, NP-031112, NP-12; Nypta, Zentylor) – glycogen synthase kinase 3β (GSK-3β) inhibitor Vafidemstat (ORY-2001) – dual lysine specific demethylase 1 (LSD1) inhibitor and monoamine oxidase B (MAO-B) inhibitor Xenon (NBTX-001) – ionotropic glutamate NMDA receptor antagonist
"...and much more likely to endure their miseries publicly; a tired walker, after all, merely sits down – a tired cyclist falls off and possibly brings others crashing down as well. That's much more fun". The fascination with six-day bicycle races spread across the Atlantic and appealed to the crowds in America as well. And the more spectators paid at the gate, the higher the prizes could be and the greater was the incentive of riders to stay awake—or be kept awake—to ride the greatest distance. Their exhaustion was countered by soigneurs (the French word for "healers"), helpers akin to seconds in boxing. Among the treatments they supplied was nitroglycerine, a drug used to stimulate the heart after cardiac attacks and which was credited with improving riders' breathing. Riders had hallucinations from the exhaustion and perhaps the drugs. The American champion Major Taylor refused to continue the New York race, saying: "I cannot go on with safety, for there is a man chasing me around the ring with a knife in his hand." Public reaction turned against such trials, whether individual races or in teams of two. One report said:
On Truth Social, Trump expressed his anger that the press pool had "refused to cover one of the Biggest and Most Beautiful Events to take place in many years". The press pool resumed its coverage of Trump on September 25 after the administration reinstated the news outlets.
Sources: en.wikipedia.org
It targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not act primarily on androgen receptors. This distinction separates it from SARMs.
Rodent studies found dose-dependent tumors in several organs. The sponsor discontinued the program over cancer concerns. Human risk from long-term use remains unknown.
Controlled human endurance trials are lacking. Animal studies show increased exercise capacity under some conditions. Anecdotal reports are not equivalent to clinical evidence.
Cardarine targets PPARδ, a nuclear receptor involved in lipid and energy metabolism. It does not bind the androgen receptor in the way SARMs do.