PPARδ agonist raises a handful of sensible questions. This page answers them in order, starting with the fundamentals and moving to applications.
This page was last updated on 2025-12-22 and is reviewed periodically as new material appears.
Sporting authorities added GW501516 to prohibited lists after it appeared in athlete samples and online markets. The World Anti-Doping Agency classifies it as a hormone and metabolic modulator, and its use can lead to an anti-doping rule violation. Some early laboratory work suggested effects on fatty acid oxidation and endurance-related metabolism in animals, but those findings do not establish safe or effective use in people. Reports of adverse events in humans are scarce and often anecdotal, which complicates risk assessment.
Legal status varies by country. In some places, cardarine is controlled under medicines or psychoactive substances laws; in others, it may be sold with minimal oversight as a research chemical. Customs agencies have intercepted shipments, and several national health agencies have issued warnings about products marketed for bodybuilding or performance enhancement. The lack of a standardized pharmaceutical supply means identity, purity, and contamination levels can differ widely between samples. These factors make cardarine a regulatory and public health concern rather than a conventional prescription drug.
Cardarine is a common name for GW501516, a synthetic compound first described in the 1990s as a selective agonist of the peroxisome proliferator-activated receptor delta. It was studied in preclinical models for metabolic and cardiovascular conditions, but it has not been approved as a medicine in the United States, Europe, or other major jurisdictions. Retail products labeled as cardarine are generally research chemicals or supplements, not pharmaceutical formulations. Because human safety and efficacy data remain limited, regulatory agencies treat it as an unapproved substance rather than a therapeutic product.
Quality assessment for cardarine samples usually combines identity, purity, and impurity testing. Nuclear magnetic resonance spectroscopy and mass spectrometry can confirm molecular structure, while high-performance liquid chromatography estimates purity. Certificates of analysis from testing laboratories may list these results, but they do not establish safety or legality. In the absence of approved manufacturing, products sold online may contain the wrong compound, variable amounts, or unlisted contaminants. Independent verification is therefore central to analytical work and to interpreting any reported biological activity.
Laboratory detection of GW501516 commonly uses liquid chromatography coupled with tandem mass spectrometry. The method can identify the parent compound or its metabolites in urine and blood after sample cleanup. Protein precipitation, solid-phase extraction, or enzymatic hydrolysis may precede analysis, depending on the matrix. Reference standards are required for accurate quantification and confirmation. Because the compound is not approved, testing often occurs in anti-doping, forensic, or research settings rather than routine clinical care. Results are reported with limits of detection and quantification.
Stability of GW501516 depends on form, temperature, light exposure, and moisture. Solid reference material is typically stored frozen or refrigerated in a desiccator and protected from light. Solutions in organic solvents such as dimethyl sulfoxide are often kept frozen in aliquots to reduce freeze-thaw cycling. Aqueous solubility is low, so aqueous stock solutions can be difficult to prepare without cosolvents. Degradation may appear as changes in chromatographic purity or mass spectral signal. Stability studies are needed to establish shelf life for any specific preparation.
| Property | Value | Notes |
|---|---|---|
| IUPAC name | {4-[({4-methyl-2-[4-(trifluoromethyl)phenyl]-1,3-thiazol-5-yl}methyl)sulfanyl]phenoxy}acetic acid | Systematic name for GW501516 |
| CAS Registry Number | 317318-70-0 | Unique identifier for the parent compound |
| Molecular formula | C21H18F3NO3S2 | Includes carbon, hydrogen, fluorine, nitrogen, oxygen, and sulfur |
| Molecular weight | 453.5 g/mol | Approximate value for the neutral form |
| Appearance | White to off-white powder | Typical description for purified laboratory material |
PPARδ is a nuclear receptor that influences transcription of genes involved in fatty acid oxidation, lipid transport, and energy homeostasis. GW501516 binds and activates this receptor with high selectivity relative to PPARα and PPARγ in laboratory assays. Activation alters expression of target genes in skeletal muscle, liver, and adipose tissue in animal models. The exact clinical consequences of these changes in humans remain incompletely characterized, and observed effects in animals do not establish therapeutic benefit or safety.
Published studies have examined GW501516 in animal models of obesity, insulin resistance, and exercise endurance. Early human trials reportedly ended, and development was discontinued after preclinical findings raised concerns about cancer in some rodent studies. Regulatory agencies have not approved cardarine for any medical use. Its availability through non-pharmaceutical channels raises questions about identity, purity, and legal status that are separate from its laboratory pharmacology. Those questions are often addressed through analytical testing rather than assumptions about product labels.
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.
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.
== Export == Sinokrot holding has expanded their businesses of medjoul dates (Pal Gardens Agriculture Company) to the european markets. Building relationships with big European Dates distributors such as Dadelskopen.
Unlike aerated chocolates produced with large bubbles, micro-aerated chocolate has nitrogen beaten into the mixture. The resulting chocolate, different not only in bubble size but also flavour and texture. This is theorised to arise from the gas having a different solubility. Aerated chocolates containing long tubes of air are also created using this technique, but their distinction comes from how the aerated chocolate is extruded rather than set in a moulded shell. The final type, those held together by a skeleton of solid particles, are produced using water evaporation methods. In the first of these, sugar is dissolved in water. This solution is emulsified with cocoa liquor and milk solids, which is evaporated and then dried using industrial machinery, until the product contains less than 2% water. In the second, water is emulsified with liquid chocolate and set and then freeze dried, removing the water.
A key assumption in this field is that the concept of well-being involves a commitment to what is desirable, functioning as an evaluative framework for guiding behavior and assessing lifestyles. Anthropologists compare these commitments and frameworks across different cultures, like the differences between Western and non-Western conceptions of well-being. They describe the similarities and differences, typically without taking a position on which view is superior.
At some time after the Norman conquest of England in 1066 a motte-and-bailey was erected on the present site of Castle Park. Bristol was held by Geoffrey de Montbray, Bishop of Countances, one of the knights who accompanied William the Conqueror. William ordered stone castles to be built so it is likely that the first parts of Bristol Castle were built by Geoffrey in his reign. After the Conqueror's death (1087), Geoffrey joined the rebellion against William Rufus. Using Bristol as his headquarters, he burned Bath and ravaged Somerset before submitting to Rufus. He eventually returned to Normandy and died at Coutances in 1093. Rufus created the Honour of Gloucester, which included Bristol, from his mother Queen Matilda's estates and granted it to Robert Fitzhamon. Fitzhamon enlarged and strengthened Bristol castle and in the latter years of the 11th century conquered and subdued much of south and west Wales. His daughter Mabel was married in 1114 to Henry I's bastard son Robert of Caen. Her dowry was a large part of her father's Gloucestershire and Welsh estate and Robert of Caen became the first Earl of Gloucester, c. 1122. He is believed to have been responsible for completing Bristol castle. In 1135 Henry I died and the Earl of Gloucester rallied to the support of his sister Matilda against Stephen of Blois who had seized the throne on Henry's death. Stephen attempted to lay siege to Robert at Bristol in 1138 but gave up the attempt as the castle appeared impregnable.
== In popular media == In the Rick and Morty episode "Get Schwifty", the character "Ice-T", voiced by show creator Dan Harmon, is portrayed as secretly being alien royalty exiled to Earth, whose natural shape is a letter T made of water. Ice-T reacted on Twitter by saying "This happens with cartoonists after lots of drugs…. Fn Crazy!!". Despite this, he would later voice the character Magma-Q, the fictional father of Ice-T, in the season 7 Rick and Morty episode "Rise of the Numbericons". Stand-up comedian John Mulaney dedicates a long segment on his comedy special New in Town to the humorous expositional nature of Ice-T's role on Special Victims Unit, saying that his function on the show is to be perpetually amazed by bad things, despite being in a sex crimes unit.
Sources: en.wikipedia.org
=== Tumor suppressor === Loss-of-heterozygosity (LOH) of the 7q22.1 chromosomal region, where CUX1 resides, was reported in 8–22% of various cancer, and in close to 50% in therapy-associated leukemias. As no inactivating mutations were found in the remaining allele, the notion that CUX1 could be the tumor suppressor gene on 7q22.1 was dismissed for some time. However, refined mapping in leiomyomas and myeloid leukemias eventually pointed to CUX1 as the sole tumor suppressor gene in this region. These genetic data suggest that CUX1 may be a haploinsufficient tumor suppressor gene. In addition to LOH events, large scale DNA sequencing identified inactivating point mutations in 1–5% of cancers where both alleles are present. There is no tumor case where both CUX1 allele are inactivated. While the biochemical activities of CUX1 that explain its role in tumor maintenance and progression have been well defined, the biochemical functions of CUX1 involved in tumor suppression have yet to be firmly established. Two mechanisms have been proposed. One study reported that CUX1 functions as a transcriptional activator of PIK3IP1, a gene that codes for the phosphoinositide-3-kinase interacting protein 1 (PIK3IP1), a direct inhibitor of the PI3K p110 catalytic subunit. CUX1 knockdown caused a decrease in PIK3IP1 expression that was associated with an increase in PI3K signaling and AKT signaling. A separate study, however, argued that CUX1 is itself a target of AKT signaling.
=== Political views and activities === Because of Hodgkin's political activities, and her husband's association with the Communist Party, she was banned from entering the US in 1953 and subsequently not allowed to visit the country except by CIA waiver. In 1961 Thomas became an advisor to Kwame Nkrumah, President of Ghana, a country he visited for extended periods before Nkrumah's ouster in 1966. Hodgkin was in Ghana with her husband when they received the news that she had been awarded the Nobel Prize. She acquired from her mother, Molly, a concern about social inequalities and a determination to do what she could to prevent armed conflict. Dorothy became particularly concerned about the threat of nuclear war. In 1976, she became president of the Pugwash Conference and served longer than any who preceded or succeeded her in this post. She stepped down in 1988, the year after the Intermediate-Range Nuclear Forces Treaty imposed "a global ban on short- and long-range nuclear weapons systems, as well as an intrusive verification regime". She accepted the Lenin Peace Prize from the Soviet government in 1987 in recognition of her work for peace and disarmament.
=== Genetics === The observation of high rates of autoimmune disorders in families with a history of Sjögren's disease is linked with a genetic predisposition to the disease. Studies on the polymorphisms of human leukocyte antigen (HLA)-DR and HLA-DQ gene regions in Sjögren's patients show differential susceptibility to the disease as the result of different types of the resulting autoantibody production.
Many women believe that sagging (ptosis) is caused by the failure of the Cooper's ligaments to support the breast tissue. In fact, ptosis is partly determined by genetic factors, but a review found that the biggest factors are higher body mass index, larger breast size, significant weight loss, smoking, number of pregnancies, and age. Many women incorrectly believe that wearing a brassiere prevents their breasts from sagging later in life and that breasts cannot anatomically support themselves. But bra manufacturers have stated that because breasts are formed of fatty tissue and not muscle, bras only affect the shape of breasts while they are being worn. Pathologically heavy breasts may cause pain in the woman's upper thoracic area, but this may be due to a poorly-fitting bra. Numerous reports state that 80–85% of women are wearing the wrong bra size. In middle-aged women, breast ptosis is caused by a combination of factors. If the woman has had children, postpartum hormonal changes will cause the depleted milk glands to atrophy. Women who experience multiple pregnancies repeatedly stretch the skin envelope during engorgement while lactating. As a woman's breasts grow in size during repeated pregnancies, the Cooper's ligaments that maintain the position of the mammary glands against the chest are stretched and gradually lose strength. Breast tissue and suspensory ligaments may also be stretched if the woman is overweight or loses and gains weight.
Sources: en.wikipedia.org
All chordates are deuterostomes. Which means, during embryonic development, the anus forms before the mouth does. All chordates are based on a bilateral body plan. All chordates are coelomates, and have a fluid-filled body cavity (coelom) with a complete serosal lining derived from mesoderm called mesothelium (see Brusca and Brusca).
=== Urine === A urine sample, originating from the bladder, is obtainable both voluntarily and taken post-mortem. Notably, urine is less prone to viral infections such as HIV or Hepatitis B in comparison to blood samples. Many drugs exhibit higher concentrations and more prolonged detection in urine compared to blood. The collection of urine samples is a non-invasive process that doesn't necessitate professional assistance. While urine is commonly used for qualitative analysis, it does not provide indications of impairment since the presence of drugs in urine merely signifies prior exposure. The duration of drug detection in urine varies; for instance, alcohol is detectable for 7–12 hours, cocaine metabolites for 2–4 days, and morphine for 48–74 hours. Marijuana, a substance with variable detection times depending on usage patterns, can be detected for 3 days after a single use, 5–7 days for moderate use (four times per week), 10–15 days for daily use, and less than 30 days for long-term heavy use; contingent upon frequency and intensity of consumption.
== History == In the historical era, the area of the Willamette Valley that makes up modern-day Albany was inhabited by one of the tribes of the Kalapuya, a Penutian-speaking, Native American people. The Kalapuya had named the area Takenah, a Kalapuyan word used to describe the deep pool at the confluence of the Calapooia and Willamette rivers. A variation of the place name can also be written as Tekenah. The Kalapuya population in the valley was between 4,000 and 20,000 before contact with Europeans, but they suffered high mortality from new infectious diseases introduced shortly afterward. The tribes were devastated by a smallpox epidemic that raged through the Pacific Northwest in 1782–83. A malaria outbreak swept through the region between 1830 and 1833. It is estimated that as many as 90 percent of the Kalapuya population died during this period. That, coupled with the treaties signed during the 1850s by the Kalapuya to cede land to the United States, left the area nearly free for European Americans to settle.
4-HO-MET binds to various serotonin receptors and is known to act as an agonist of the serotonin 5-HT2A, 5-HT2B, 5-HT2C, and 5-HT1A receptors. It is thought that the hallucinogenic effects of serotonergic psychedelics like 4-HO-MET are mediated by serotonin 5-HT2A receptor activation.
== Principle == In the case of M13 filamentous phage display, the DNA encoding the protein of interest is inserted into the gene encoding either the minor (pIII) or the major (pVIII) coat protein. The modified coat protein gene and the rest of the phage genome is then introduced into E. coli bacteria, which produce phage virions with the relevant protein fragment as part of their outer coat phage and the DNA encoding for these proteins packaged inside the phage. The phages can then be selected using e.g. DNA or protein molecules immobilized on the surface of a microplate. Specifically, phages that display proteins that binds to those targets will remain attached, while others will be removed by washing. Those that remain can be eluted and amplified by bacterial infection. The repeated cycling of selection, elution and amplification is sometimes referred to as 'panning', in reference to the enrichment of a sample of gold by removing undesirable materials. Phage eluted in the final step can be sequenced to identify the selected proteins. During amplification step, additional mutations may be introduced into the genes encoding the proteins of interest, enabling a directed evolution protocol. Elution can be done combining low-pH elution buffer with sonification, which, in addition to loosening the peptide-target interaction, also serves to detach the target molecule from the immobilization surface. This ultrasound-based method enables single-step selection of a high-affinity peptide.
Sources: en.wikipedia.org
No. Major drug regulators have not approved GW501516 for treating any medical condition. Products sold as cardarine are typically unapproved research chemicals or supplements, so their contents and safety are not assured.
It is prohibited by the World Anti-Doping Agency as a hormone and metabolic modulator. Athletes who test positive for GW501516 can face sanctions, including suspensions and loss of results.
Cardarine is a common or trade-style name, while GW501516 is the research code for the same chemical entity. Some sources also use Endurobol or GSK-516. The names refer to the same compound, not distinct drugs.
LC-MS/MS is common, often after sample cleanup. The assay targets GW501516 or its metabolites.