A practical reference on Metabolic modulator: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
This page was last updated on 2026-02-09 and is reviewed periodically as new material appears.
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.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Common name | Cardarine | Also called GW501516 and endurobol. |
| Chemical formula | C21H18F3NO3S2 | Molecular weight about 453.5 g/mol. |
| Appearance | White to off-white solid | Form depends on synthesis and purity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, protected from light | Common for research chemicals. |
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.
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.
Activation of PPARδ changes transcription of genes involved in fatty acid transport, mitochondrial function, and skeletal muscle fuel preference. In rodent studies, pharmacological PPARδ activation was associated with increased endurance and altered body composition. These findings generated interest in performance enhancement, but species differences and study designs limit direct extrapolation to humans. Small human trials were conducted in the 2000s and later discontinued. The extent to which cardarine produces similar metabolic or performance effects in people remains an open question.
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.
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.
== The proteome in bacterial systems == Proteomic analyses have been performed in different kinds of bacteria to assess their metabolic reactions to different conditions. For example, in bacteria such as Clostridium and Bacillus, proteomic analyses were used in order to investigate how different proteins help each of these bacteria spores germinate after a prolonged period of dormancy. In order to better understand how to properly eliminate spores, proteomic analysis must be performed.
Rickets, a childhood disease, is characterized by impeded growth and soft, weak, deformed long bones that bend and bow under their weight as children start to walk. Maternal vitamin D deficiency can cause fetal bone defects from before birth and impairment of bone quality after birth. Rickets typically presents between 3 and 18 months of age. This condition can be caused by vitamin D, calcium or phosphorus deficiency. Vitamin D deficiency remains the main cause of rickets among young infants in most countries because breast milk is low in vitamin D, and darker skin, social customs, and climatic conditions can contribute to inadequate sun exposure. A post-weaning Western omnivore diet characterized by high intakes of meat, fish, eggs and vitamin-D–fortified milk is protective, whereas low intakes of those foods and high (unfortified) cereal/grain intake contribute to risk. For young children with rickets, supplementation with vitamin D plus calcium was superior to the vitamin alone for bone healing.
Since the establishment of psychoanalytic theory, the notion and meaning of individuals having an unconscious, popularised by Freud, has come to be commonly accepted. An individual's personal unconscious is made up of thoughts and emotions that have, at some time, been experienced or held in mind but which have been repressed or forgotten. By contrast, the collective unconscious is neither acquired by activities within an individual's life nor is it a container of things that are thoughts, memories or ideas which are capable of being conscious during one's life. In this sense, the contents of it were never naturally "known" through physical or cognitive experience and then forgotten. The collective unconscious consists of universal heritable elements common to all humans, distinct from other species. However, this does not necessarily imply a genetic cause, but rather encapsulates influences of evolutionary biology, the history of civilization, ethnology, brain and nervous system development, and general psychological development.
=== Odor === Kimchi is known for its strong, spicy, flavors and odors, although milder varieties exist. Variations in the fermentation process cause the final product to be highly variable in terms of quality and flavor. The strong odor is especially tied to the sulfur compounds from garlic and ginger of kimchi, which can be less appealing to non-Koreans. Thus, scientists are experimenting with the types of bacteria used in its production to minimize the odor to increase the appeal to international markets. These efforts are not universally appreciated by lovers of kimchi, as the flavor is affected in the process, and some see that "South Korea's narrative about its own culinary staple" is being manipulated to suit the foreigners' tastes.
Sources: en.wikipedia.org
On 18 October 2011, the European Commission adopted the following definition of a nanomaterial for regulatory purpose:A natural, incidental or manufactured material containing particles, in an unbound state or as an aggregate or as an agglomerate and for 50% or more of the particles in the number size distribution, one or more external dimensions is in the size range 1 nm – 100 nm. In specific cases and where warranted by concerns for the environment, health, safety or competitiveness the number size distribution threshold of 50% may be replaced by a threshold between 1% to 50%.
=== An–Av === Gloria Long Anderson (born 1938), American chemist, pioneer of nuclear magnetic resonance spectroscopy Christian B. Anfinsen (1916–1995), American chemist known for work on ribonuclease, 1972 Nobel Prize in Chemistry Andrea Angel (1877–1917), English chemist known for work on explosives Angelo Angeli (1864–1931), Italian chemist who studied nitrogen compounds such as hydrazoic acid Octavio Augusto Ceva Antunes (died 2009), Brazilian chemist, consultant for the production of anti-HIV drugs Anthony Joseph Arduengo, III (born 1952), American chemist known for chemical compounds with unusual valency Johan August Arfwedson (1792–1841), Swedish chemist who discovered lithium Anton Eduard van Arkel (1893–1976), Dutch chemist who developed a method for preparing pure titanium and other metals Svante Arrhenius (1859–1927), Swedish chemist, one of the founders of physical chemistry, he used physical chemistry to estimate the effect of atmospheric carbon dioxide the Earth's increasing surface temperature; Nobel Prize in Chemistry, 1903 Valerie Ashby (born 1965/1966), American chemist known for work on functionalized diene monomers and polymers Barbara Askins (born 1939), American chemist known for inventing a method to enhance underexposed photographic negatives Larned B.
A body fat meter is a tool used to measure the body fat to weight ratio in the human body. Different meters use various methods to determine the ratio. They tend to under-read body fat percentage. In contrast with clinical tools like DXA and underwater weighing, one relatively inexpensive type of body fat meter uses the principle of bioelectrical impedance analysis (BIA) in order to determine an individual's body fat percentage. To achieve this, the meter passes a small, harmless, electric current through the body and measures the resistance, then uses information on the person's weight, height, age, and sex to calculate an approximate value for the person's body fat percentage. The calculation measures the total volume of water in the body (lean tissue and muscle contain a higher percentage of water than fat), and estimates the percentage of fat based on this information. The result can fluctuate several percentage points depending on what has been eaten and how much water has been drunk before the analysis. This method is quick and readily accessible, but imprecise. Alternative methods are: skin fold methods using calipers, underwater weighing, whole body air displacement plethysmography (ADP) and DXA.
Sources: en.wikipedia.org
Cardarine is a common name for the investigational compound GW501516. It acts as a PPARδ agonist and is not approved for human use. It is prohibited in sport.
It activates PPARδ, a nuclear receptor that influences gene expression related to lipid and energy metabolism. Animal studies show changes in endurance and lipid levels. Human effects and risks are not well established.
No, cardarine is not a steroid. It belongs to a different chemical class, the PPARδ agonists. It is also not a selective androgen receptor modulator.
Yes, WADA prohibits cardarine as a PPARδ agonist. It appears on the prohibited list and can be detected in urine or blood. Athletes using it risk sanctions.