The short version of preclinical models fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-12-26 and is reviewed periodically as new material appears.
The compound is typically described as a laboratory compound rather than a therapeutic product. Published reports have explored its role in lipid disorders, insulin sensitivity, and exercise metabolism, yet no major drug regulator has approved it for medical use. Commercial samples sold under the cardarine name may vary in purity and identity. Analytical confirmation is therefore necessary when the material is discussed in scientific or regulatory contexts. Its classification as a prohibited substance in sport further shapes how it is studied and reported.
Cardarine is a common name for GW501516, a synthetic compound studied for its effects on lipid and glucose metabolism. It functions as an agonist at peroxisome proliferator-activated receptor delta, or PPARδ, a nuclear receptor that influences gene expression. The molecule is not a steroid, nor is it a selective androgen receptor modulator. It is also known in research and sports literature as GW-501516 and endurobol. Early laboratory work examined its metabolic activity in cell cultures and animal models.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic PPARδ agonist | Not a steroid or a selective androgen receptor modulator. |
| Common synonyms | Cardarine, GW501516, GW-501516, endurobol | Names vary by supplier and literature source. |
| Appearance | White to off-white powder | Consistent with many small-molecule research chemicals. |
| Solubility | Low in water; soluble in DMSO and ethanol | Often prepared in organic solvent for laboratory work. |
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid and energy metabolism. |
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.
Laboratory detection of cardarine typically involves sample preparation followed by chromatographic separation and mass spectrometric identification. Urine is the most common matrix for anti-doping tests, though blood and hair have also been explored. Methods can target the parent compound or its metabolites, depending on the expected window of detection. Reference standards are required for accurate quantification. Matrix effects and dilution can influence results, so laboratories use internal standards and validation protocols. The exact detection window varies with dose, route, and individual metabolism.
At the molecular level, GW501516 binds and activates PPARδ, a nuclear receptor that regulates transcription. Activation shifts expression of genes involved in fatty acid oxidation, energy expenditure, and lipid transport in skeletal muscle and liver. Animal studies report increased endurance and altered lipid profiles after exposure. Human data are limited to small trials and do not establish long-term safety or efficacy. PPARδ also has roles in cell proliferation, so the relationship between activation and cancer risk remains an open question.
Published literature on cardarine includes in vitro assays, rodent experiments, and a small number of human studies. Reports describe effects on exercise capacity and lipid metabolism in animals, while human evidence is sparse. Many online descriptions present the compound as a proven endurance aid, a claim not supported by regulatory approval or large clinical trials. Analytical studies focus on identifying the parent compound and its metabolites in biological samples. Important uncertainties include species differences, dose-response relationships, and the relevance of rodent tumor findings to humans.
Cardarine is the common name for GW501516, a synthetic compound studied as a peroxisome proliferator-activated receptor delta agonist. Researchers developed it to explore treatments for lipid disorders and metabolic conditions. It is not an approved medicine in any country. Early clinical work examined changes in HDL cholesterol and triglycerides, but development was discontinued after animal studies raised concerns about cancer. The compound remains available as a research chemical and appears in discussions of performance enhancement.
GW501516 acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in transcription of genes related to lipid handling and energy use. Activation of PPARδ can shift skeletal muscle toward greater fatty acid oxidation in animal models, which is one reason it drew interest for metabolic disease and exercise research. The exact downstream effects depend on tissue, species, dose, and duration. Human data are sparse, so many proposed benefits remain hypotheses rather than established clinical outcomes.
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.
=== Medication === Cardiovascular risk factors, such as hypercholesterolaemia, hypertension, diabetes, and smoking, are associated with a higher risk of onset and worsened course of AD. The use of statins to lower cholesterol may be of benefit in AD. Antihypertensive and antidiabetic medications in individuals without overt cognitive impairment may decrease the risk of dementia by influencing cerebrovascular pathology. Depression is associated with an increased risk for AD; management with antidepressant medications may provide a preventative measure. Historically, long-term usage of non-steroidal anti-inflammatory drugs (NSAIDs) was thought to be associated with a reduced likelihood of developing AD, as it reduces inflammation. NSAIDs do not appear to be useful as a treatment. Additionally, because women have a higher incidence of AD than men, it was once thought that estrogen deficiency during menopause was a risk factor. There is a lack of evidence to show that hormone replacement therapy (HRT) in menopause decreases the risk of cognitive decline.
Titration curves can be computed within a continuum electrostatics approach with formally exact but more elaborate analytical or Monte Carlo (MC) methods, or inexact but fast approximate methods. MC methods that have been used to compute titration curves are Metropolis MC or Wang–Landau MC. Approximate methods that use a mean-field approach for computing titration curves are the Tanford–Roxby method and hybrids of this method that combine an exact statistical mechanics treatment within clusters of strongly interacting sites with a mean-field treatment of intercluster interactions.
Other progenitors for non-myogenic (mononuclear) cells are present in the interstitial space as fibro-adipogenic progenitors (FAPs) which can differentiate into fibroblasts, osteoblasts, and adipocytes. FAPs are distinct from MSCs by the lack of expression of PAX7. Nuclei present in skeletal muscle are about 50% myocyte nuclei and 50% mononuclear cell nuclei. Mononuclear cell types include capillary endothelial cells (45%), fibro-adipogenic progenitors (FAPs)(20%), pericytes (14%) and endothelial-like pericytes (4%). Another 9% of mononuclear cells are muscle stem cells, adjacent to muscle fiber cells. B-cells and T-cells (3%) and macrophages (2%). Each cell type expresses different sets of genes. In a biopsy of human thigh skeletal muscle, there are 13,026 to 13,108 genes with detected expression.
Excess appetite for palatable, high-calorie food (especially fat, sugar, and certain animal proteins) is seen as the primary factor driving obesity worldwide, likely reflected in imbalances in neurotransmitters affecting the drive to eat, as well as changes to the duodenum impacting nutrient sensing and signaling related to a Western pattern diet. Dietary energy supply (the amount of calories in available food) per capita varies markedly between different regions and countries. It has also changed significantly over time. From the early 1970s to the late 1990s the average food energy available per person per day (the amount of food bought) increased in all parts of the world except Eastern Europe. The United States had the highest availability with 3,654 calories (15,290 kJ) per person in 1996. This increased further in 2003 to 3,754 calories (15,710 kJ). During the late 1990s, Europeans had 3,394 calories (14,200 kJ) per person, in the developing areas of Asia there were 2,648 calories (11,080 kJ) per person, and in sub-Saharan Africa people had 2,176 calories (9,100 kJ) per person. Total food energy consumption has been found to be related to obesity.
=== Detection === Hydroxychloroquine may be quantified in plasma or serum to confirm a diagnosis of poisoning in hospitalized victims or in whole blood to assist in a forensic investigation of a case of sudden or unexpected death. Plasma or serum concentrations are usually in a range of 0.1-1.6 mg/L during therapy and 6–20 mg/L in cases of clinical intoxication, while blood levels of 20–100 mg/L have been observed in deaths due to acute overdosage.
Sources: en.wikipedia.org
== Diagnosis == The diagnosis is based on involvement of less than 10% of the skin. It is known as TEN when more than 30% of the skin is involved and an intermediate form with 10 to 30% involvement. A positive Nikolsky's sign is helpful in the diagnosis of SJS and TEN. A skin biopsy is helpful, but not required, to establish a diagnosis of SJS and TEN.
== Production == Homoarginine is formed as a derivative from lysine through reactions similar to those of the urea cycle. Just as in the urea cycle, in its synthesis, ornithine is replaced by lysine. Ornithine transcarbamylase is the main enzyme for homoarginine synthesis. The production of homoarginine is based around the activity of this enzyme. Although ornithine transcarbamylase has a higher affinity to ornithine, it ends up catalyzing the transaminidation reaction of lysine as well, which starts homoarginine production. The reason it also catalyzes this reaction with lysine is because of the low substrate selectivity in the reaction. Another pathway for the production of Homoarginine includes glycine amidinotransferase (AGAT). This enzyme normally acts through the transfer of an amidino group from arginine to glycine, resulting in formation of guanidinoacetic acid, which is subsequently methylated by guanidinoacetate methyltransferase (GAMT) to form creatine. However, glycine amidinotransferase (AGAT) sometimes acts by using lysine instead of glycine in the reaction, therefore lysine becomes the acceptor of the amidino group, resulting in the production of homoarginine.
Naturally occurring tungsten (74W) consists of five isotopes. Four are considered stable (182W, 183W, 184W, and 186W) and one is slightly radioactive, 180W, with an extremely long half-life of (1.59±0.05)×1018 years. This results in about two alpha decays of 180W per gram of natural tungsten per year, so for most practical purposes, 180W can be considered stable. The other naturally occurring isotopes are also capable of alpha decay and so only observationally stable. Artificial radioisotopes of tungsten have been observed from 156W to 197W, the most stable of which are 181W with a half-life of 120.96 days, 185W with a half-life of 75.1 days, 188W with a half-life of 69.77 days and 178W with a half-life of 21.6 days. All of the remaining radioactive isotopes have half-lives less than one day, and most of these less than 8 minutes. The most stable known meta state is 179m1W with half-life 6.40 minutes.
== Business == Admiral Group, insurer, Cardiff, Wales, LSE symbol ADM American Dream Meadowlands, a mall in New Jersey, US Archer Daniels Midland, a food-processing company Astra Daihatsu Motor, an Indonesian automotive company
After Liautaud graduated second to last in his class at Elgin Academy in 1982, his father gave him a choice to either join the Army or start a business. Although his father wanted him to enlist, the younger Liautaud chose the latter, and his father agreed to loan him $25,000 in exchange for a 48% stake in the business. Initially, Liautaud wanted to open a hot dog stand, but after visiting numerous such stands throughout the summer of 1982, he realized the $25,000 would not be enough for such a venture. After a chance encounter at a sandwich shop, he realized that he could open a sandwich shop within his available budget by purchasing premium meats at a neighborhood market and baking his own bread. With the help of his family as tasters, he decided to put four sandwiches on his original menu. Paying $200 a month in rent, Liautaud could afford only used equipment consisting of a refrigerator, a chest freezer, an oven, and a meat slicer. On January 13, 1983, Jimmy John's Gourmet Sandwiches opened in Charleston, Illinois. Due to the poor location of his first store, Liautaud decided to include delivery of his sandwiches to boost sales. He began by bringing samples door-to-door to the dorms of nearby Eastern Illinois University, which he had attended for one semester. By the end of his first year, the restaurant started making a profit. In April 1985, Liautaud bought out his father's interest in the business, becoming the sole owner. In 1986, he opened his second store in Macomb, Illinois, and in 1987, he opened a third in Champaign, Illinois.
Sources: en.wikipedia.org
=== Systematic reviews identifying safety signals === A 2013 comprehensive systematic review by Dr. Salvatore Gentile concluded that second‑generation long‑acting injectable antipsychotics (SGA‑LAIs) "seem to also show unforeseen and worrisome safety signals," and noted that "worsening of psychotic symptoms and depression could also be associated with both risperidone‑LAI and paliperidone palmitate." The leading cause of death among patients enrolled in risperidone‑LAI studies was suicide. A 2017 systematic update by the same author concluded that SGA‑LAIs "do not offer advantages in safety compared with first‑generation antipsychotic LAIs or oral antipsychotics," and highlighted weight gain, hyperprolactinemia, and the finding that the three‑monthly paliperidone palmitate formulation still lacked exhaustive safety data.
The synthesis of ansamycin antibiotic (+)-mycotrienol makes use of a late stage tandem Stille type macrocycle coupling. Here, the organostannane has two terminal tributyl tin groups attacked to an alkene. This organostannane "stitches" the two ends of the linear starting material into a macrocycle, adding the missing two methylene units in the process. After oxidation of the aromatic core with ceric ammonium nitrate (CAN) and deprotection with hydrofluoric acid yields the natural product in 54% yield for the 3 steps. An alkene group is added to vinyl bromide, followed by an in situ Diels-Alder cycloaddition between the added alkene and the alkene in the pyrrolidine ring.
Amylin, or islet amyloid polypeptide (IAPP), is a 37-residue peptide hormone. It is co-secreted with insulin from the pancreatic β-cells in the ratio of approximately 100:1 (insulin:amylin). Amylin plays a role in glycemic regulation by slowing gastric emptying and promoting satiety, thereby preventing spikes in blood glucose levels after a meal. IAPP is processed from an 89-residue coding sequence. Proislet amyloid polypeptide (proIAPP, proamylin, proislet protein) is produced in the pancreatic beta cells (β-cells) as a 67 amino acid, 7404 Dalton pro-peptide and undergoes post-translational modifications including protease cleavage to produce amylin.
Cells that stop dividing (post-mitotic) and differentiate into neurons early in cortical development are important in laying the groundwork on which other developing neurons can be guided to their proper destination. Tbr1 aids in neuronal migration in the early development of the cerebral cortex. It is largely expressed in post-mitotic neurons of the preplate, which forms a foundation upon which neurons are able to grow and move. As a transcription factor, Tbr1 modulates the expression of RELN, which encodes the Reln protein that forms part of the extracellular matrix of cells. Thus, through regulation of Reln expression, Tbr1 regulates the formation of the matrix through which neurons migrate. Without Tbr1, neurons fail to migrate properly.
Sources: en.wikipedia.org
Cardarine is a common name for GW501516, a synthetic PPARδ agonist. It is not a steroid or a selective androgen receptor modulator. It was developed and studied as a research compound for metabolic pathways.
It binds to and activates PPARδ, a nuclear receptor that regulates genes related to fatty acid oxidation and energy use. This activation alters transcription in tissues such as skeletal muscle and liver. The full range of downstream effects in humans is not fully established.
No, cardarine is not known to occur naturally in plants, animals, or humans. It is a synthetic molecule produced for laboratory research. Products labeled as cardarine should therefore be treated as manufactured chemicals with variable purity.
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.