Metabolic modulator raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
Reviewed 2026-06-23. Anything still debated is marked as such rather than presented as settled.
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.
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.
In the fitness and bodybuilding literature, cardarine is frequently discussed as an endurance agent or fat-loss compound, although such claims are not supported by robust clinical evidence. Online descriptions often mix animal data, user anecdotes, and marketing language. Researchers who study PPARδ agonists distinguish between receptor activation in controlled experiments and unsupervised use of unverified products. The latter introduces unknown purity, dose, and interactions, making reported experiences difficult to interpret scientifically.
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.
| 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. |
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.
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.
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.
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.
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.
== Directed panspermia == During the 1960s, Crick became concerned with the origins of the genetic code. In 1966, Crick took the place of Leslie Orgel at a meeting where Orgel was to talk about the origin of life. Crick speculated about possible stages by which an initially simple code with a few amino acid types might have evolved into the more complex code used by existing organisms. At that time, proteins were thought to be the only kind of enzyme, and ribozymes had not yet been identified. Many molecular biologists were puzzled by the problem of the origin of a protein replicating system that is as complex as that which exists in organisms currently inhabiting Earth. In the early 1970s, Crick and Orgel further speculated about the possibility that the production of living systems from molecules may have been a very rare event in the universe, but once it had developed it could be spread by intelligent life forms using space travel technology, a process they called "directed panspermia". In a retrospective article, Crick and Orgel noted that they had been unduly pessimistic about the chances of abiogenesis on Earth when they had assumed that some kind of self-replicating protein system was the molecular origin of life. In 1976, Crick addressed the origin of protein synthesis in a paper with Sydney Brenner, Aaron Klug, and George Pieczenik. In this paper, they speculate that code constraints on nucleotide sequences allow protein synthesis without the need for a ribosome.
== Function == The encoded 22 kDa protein contains an N-terminal secretion signal and two coiled-coil domains and is a member of the angiopoietin-like (ANGPTL) protein family. However, in contrast to other ANGPTL proteins, ANGPTL8 lacks the C-terminal fibrinogen-like domain, and therefore it is an atypical member of the ANGPTL family. ANGPTL8 has been shown to form complexes with ANGPTL3 with an apparent stoichiometry of 3:1 of ANGPTL3 to ANGPTL8 respectively. Formation of these complexes appears to require intracellular co-folding as mixing of ANGPTL8 and ANGPTL3 extracellularly does not result in complex formation. ANGPTL8 is expressed in the hepatic tissue and secreted into circulation, in order for the efficient secretion of ANGPTL8 it must form a complex with ANGPTL3. ANGPTL8 alone shows little inhibitory capacity and must form a complex with ANGPTL3 to inhibit the enzyme Lipoprotein lipase (LPL) and has been shown to greatly promote the ability of ANGPTL3 to inhibit LPL. In mice ANGPTL8 is secreted by the liver and by adipose tissue, hepatic overexpression of ANGPTL8 causes elevation of circulating Triglyceride levels. Despite having elevated post-heparin plasma LPL activity, mice lacking ANGPTL8 exhibit markedly decreased uptake of Very low-density lipoprotein-derived fatty acids into white adipose tissue (WAT). The defect in fatty acids uptake by WAT in ANGPTL8-null mice is likely due to the enhanced fatty acid uptake by the heart and skeletal muscle, because of the elevated LPL activity in these two tissues, as suggested by the ANGPTL3-4-8 model.
=== Pinball table === In March 2025, Multimorphic released a Portal-themed pinball table which was also available as a P3 plug-in playfield module. Ellen McLain provided original GLaDOS voice lines, and Marc Silk recorded lines for an additional personality core.
Many homes have a large kitchen area devoted to preparation of meals and food, and may have a dining room, dining hall, or another designated area for eating. Most societies also have restaurants, food courts, and food vendors so that people may eat when away from home, when lacking time to prepare food, or as a social occasion. At their highest level of sophistication, these places become "theatrical spectacles of global cosmopolitanism and myth." At picnics, potlucks, and food festivals, eating is the primary purpose of a social gathering. At many social events, food and beverages are made available to attendees. People usually have two or three meals a day. Snacks of smaller amounts may be consumed between meals. Doctors in the UK recommend three meals a day (with between 400 and 600 kcal per meal), with four to six hours between. Having three well-balanced meals (described as: half of the plate with vegetables, 1/4 protein food as meat, [...] and 1/4 carbohydrates as pasta, rice) will then amount to some 1800–2000 kcal, which is the average requirement for a regular person. In jurisdictions under Sharia law, eating may be proscribed for Muslim adults during the daylight hours of Ramadan.
Heinz Kähler: Die Augustusstatue von Primaporta. Köln 1959. Erika Simon: Der Augustus von Prima Porta. Bremen, Dorn 1959. (Opus nobile 13) Hans Jucker: Dokumentationen zur Augustusstatue von Primaporta, in: Hefte des Archäologischen Seminars Bern 3 (1977) S. 16–37. Paul Zanker: Augustus und die Macht der Bilder. München, C. H. Beck 1987, ISBN 3-406-32067-8 Kaiser Augustus und die verlorene Republik, Ausstellung Berlin 1988. Mainz, Zabern 1988. S. 386 f. Nr. 215. Erika Simon: Altes und Neues zur Statue des Augustus von Primaporta, in: G. Binder (Hrsg.), Saeculum Augustum, Bd. 3, Darmstadt, WBG 1991, S. 204–233. Dietrich Boschung: Die Bildnisse des Augustus, Gebr. Mann Verlag, Berlin 1993 (Das römische Herrscherbild, Abt. 1, Bd. 2) ISBN 3-7861-1695-4 Thomas Schäfer: Der Augustus von Primaporta im Wechsel der Medien, in: H. J. Wendel u.a. (Hrsg.), Wechsel des Mediums. Zur Interdependenz von Form und Inhalt, Rostock 2001, S. 37–58. Vinzenz Brinkmann und Raimund Wünsche (eds.): Bunte Götter. Die Farbigkeit antiker Skulptur. Eine Ausstellung der Staatlichen Antikensammlungen und Glyptothek München in Zusammenarbeit mit der Ny Carlsberg Glyptotek Kopenhagen und den Vatikanischen Museen, Rom, Staatliche Antikensammlungen und Glyptothek, München 2004 ISBN 3-933200-08-3. In Italian
Sources: en.wikipedia.org
However this claim has been challenged by another report that the human musk-recognizing receptor, OR5AN1 that robustly responds to cyclopentadecanone and muscone, fails to distinguish isotopomers of these compounds in vitro. Furthermore, the mouse (methylthio)methanethiol-recognizing receptor, MOR244-3, as well as other selected human and mouse olfactory receptors, responded similarly to normal, deuterated, and carbon-13 isotopomers of their respective ligands, paralleling results found with the musk receptor OR5AN1. Hence it was concluded that the proposed vibration theory does not apply to the human musk receptor OR5AN1, mouse thiol receptor MOR244-3, or other olfactory receptors examined. In addition, the proposed electron transfer mechanism of the vibrational frequencies of odorants could be easily suppressed by quantum effects of nonodorant molecular vibrational modes. Hence multiple lines of evidence argue against the vibration theory of smell. This later study was criticized since it used "cells in a dish rather than within whole organisms" and that "expressing an olfactory receptor in human embryonic kidney cells doesn't adequately reconstitute the complex nature of olfaction...". In response, the authors of the second study state "Embryonic kidney cells are not identical to the cells in the nose .. but if you are looking at receptors, it's the best system in the world."
== First Ministry == The Governor, Ken Michael, designated 17 principal executive offices of the Government under section 43(2) of the Constitution Acts Amendment Act 1899. The following ministers and parliamentary secretaries were then appointed to the positions, and served until the reconstitution of the Ministry on 14 December 2010. The list below is ordered by decreasing seniority within the Cabinet, as indicated by the Government Gazette and the Hansard index. Blue entries indicate members of the Liberal Party, green entries indicate members of the National Party, and grey indicates an Independent.
Primary antioxidants scavenge free radicals formed during the initial (thermal) oxidation process (ROO•), thus preventing chain reactions that lead to polymer degradation. Examples: butylated hydroxytoluene, 2,4-dimethyl-6-tert-butylphenol, para tertiary butyl phenol, 2,6-di-tert-butylphenol, 1,3,5-Tris(4-(tert-butyl)-3-hydroxy-2,6-dimethylbenzyl)-1,3,5-triazinane-2,4,6-trione
==== MeSH E05.200.500 – cytological techniques ==== MeSH E05.200.500.105 – autoradiography MeSH E05.200.500.195 – cell count MeSH E05.200.500.195.107 – blood cell count MeSH E05.200.500.195.107.330 – erythrocyte count MeSH E05.200.500.195.107.330.725 – reticulocyte count MeSH E05.200.500.195.107.595 – leukocyte count MeSH E05.200.500.195.107.595.500 – lymphocyte count MeSH E05.200.500.195.107.595.500.150 – cd4 lymphocyte count MeSH E05.200.500.195.107.595.500.150.160 – cd4-cd8 ratio MeSH E05.200.500.195.107.740 – platelet count MeSH E05.200.500.195.870 – sperm count MeSH E05.200.500.251 – cell fractionation MeSH E05.200.500.307 – cell fusion MeSH E05.200.500.363 – cell separation MeSH E05.200.500.363.285 – cytapheresis MeSH E05.200.500.363.285.570 – leukapheresis MeSH E05.200.500.363.285.790 – plateletpheresis MeSH E05.200.500.363.400 – immunomagnetic separation MeSH E05.200.500.363.540 – leukocyte reduction procedures MeSH E05.200.500.383 – colony-forming units assay MeSH E05.200.500.383.910 – tumor stem cell assay MeSH E05.200.500.385 – cytogenetic analysis MeSH E05.200.500.385.130 – chromosome banding MeSH E05.200.500.385.500 – mitotic index MeSH E05.200.500.386 – cytophotometry MeSH E05.200.500.386.350 – flow cytometry MeSH E05.200.500.386.400 – image cytometry MeSH E05.200.500.386.400.500 – laser scanning cytometry MeSH E05.200.500.387 – diffusion chambers, culture MeSH E05.200.500.388 – drug screening assays, antitumor MeSH E05.200.500.388.930 – tumor stem cell assay MeSH E05.200.500.410 – electroporation MeSH E05.200.500.607 – histocytochemistry MeSH E05.200.500.607.512 – immunohistochemistry MeSH E05.200.500.607.790 – periodic acid-schiff reaction MeSH E05.200.500.607.810 – prussian blue reaction MeSH E05.200.500.620 – histocytological preparation techniques MeSH E05.200.500.620.530 – microtomy MeSH E05.200.500.620.530.160 – cryoultramicrotomy MeSH E05.200.500.620.530.160.260 – frozen sections MeSH E05.200.500.620.620 – replica techniques MeSH E05.200.500.620.620.150 – corrosion casting MeSH E05.200.500.620.620.260 – freeze fracturing MeSH E05.200.500.620.620.260.400 – freeze etching MeSH E05.200.500.620.670 – staining and labeling MeSH E05.200.500.620.670.130 – chromosome banding MeSH E05.200.500.620.670.325 – in situ hybridization MeSH E05.200.500.620.670.325.350 – in situ hybridization, fluorescence MeSH E05.200.500.620.670.325.350.125 – chromosome painting MeSH E05.200.500.620.670.325.680 – primed in situ labeling MeSH E05.200.500.620.670.520 – negative staining MeSH E05.200.500.620.670.620 – periodic acid-schiff reaction MeSH E05.200.500.620.670.660 – prussian blue reaction MeSH E05.200.500.620.670.770 – shadowing (histology) MeSH E05.200.500.620.670.780 – silver staining MeSH E05.200.500.620.720 – tissue embedding MeSH E05.200.500.620.720.610 – paraffin embedding MeSH E05.200.500.620.720.640 – plastic embedding MeSH E05.200.500.620.760 – tissue preservation MeSH E05.200.500.620.760.160 – cryopreservation MeSH E05.200.500.620.760.160.260 – freeze drying MeSH E05.200.500.620.760.160.260.270 – freeze substitution MeSH E05.200.500.620.760.720 – tissue fixation MeSH E05.200.500.695 – karyometry MeSH E05.200.500.800 – patch-clamp techniques
== History == Static SIMS was introduced by Benninghoven at the University of Münster in 1969. He applied the technique of SIMS to study surfaces in UHV by deliberately using low primary-ion currents covering large areas. Initially, most SSIMS was performed using quadrupole mass analyzers. However, in the mid-1980s, it was realized that time-of-flight mass spectrometers are more efficient for this mode of SIMS. Compared to other surface techniques, such as Auger and photoelectron spectroscopy, SSIMS offers some unique features, including isotope sensitivity, hydrogen sensitivity, direct compound detection by molecular secondary-ion emission, and extremely high sensitivity, very often in the ppm range. However, one problem in static SIMS applications may be quantification. This problem can be overcome by using a combination of electron-spectroscopic techniques such as Auger electron spectroscopy (AES) and photoelectron spectroscopy (UPS or XPS) with static SIMS.
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 binds and activates PPARδ, a nuclear receptor that influences gene expression related to fatty acid metabolism and energy balance. This mechanism has been studied mainly in animals and cell models, not established as a safe human therapy.