Nuclear receptor 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 2026-08-01 and is reviewed periodically as new material appears.
Cardarine is a common name for GW501516, a synthetic compound developed in the 1990s through research collaborations involving GlaxoSmithKline. It belongs to a class of molecules known as peroxisome proliferator-activated receptor delta agonists. Early studies explored its effects on lipid metabolism and energy expenditure in animal models. The compound was never approved as a human medicine, and clinical development was discontinued. In the years since, it has appeared in fitness and bodybuilding communities as a performance-enhancing substance. Regulatory agencies classify it as an unapproved drug.
PPARδ is a nuclear receptor that regulates gene expression related to fatty acid oxidation, glucose homeostasis, and mitochondrial function. GW501516 binds to this receptor with high affinity and activates downstream signaling in skeletal muscle and other tissues. Animal studies reported increased endurance and altered fuel preference, but human data remain limited and inconsistent. The precise relationship between receptor activation and observed physiological changes is still an area of active investigation. Researchers have also examined whether the compound affects inflammation or cell proliferation. No approved therapeutic indication exists for cardarine.
Cardarine is a common name for GW501516, also GW-1516, a synthetic compound developed as a peroxisome proliferator-activated receptor delta (PPARδ) agonist. It belongs to a class of agents that modulate gene transcription related to lipid and energy metabolism. The compound was studied in preclinical and early clinical research for metabolic and cardiovascular conditions, but it did not progress to approved therapeutic use. Its name appears in fitness and sports contexts despite not being approved as a drug.
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.
| Property | Value | Notes |
|---|---|---|
| CAS Registry Number | 317318-70-0 | Unique identifier for the compound. |
| Chemical class | PPARδ agonist | Synthetic ligand for peroxisome proliferator-activated receptor delta. |
| Appearance | White to off-white solid | Typical form of research-grade material. |
| Solubility | Soluble in DMSO and ethanol | Poorly soluble in water. |
| Typical storage | -20°C | Recommended for long-term storage of stock solutions. |
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On November 2, 2007, Alice in Chains performed a four-song set at Benaroya Hall in Seattle for Matt Messina and the Symphony Guild's 10th anniversary benefit concert for the Seattle Children's Hospital & Regional Medical Center. In addition to the band's original material, they also played a cover of Led Zeppelin's "Kashmir" while backed by over 200 musicians, including the Northwest Symphony Orchestra and the Northwest Girlchoir.
Although the agreement was rejected in the subsequent October plebiscite, the same month, then-president of Colombia Juan Manuel Santos was awarded the Nobel Peace Prize for his efforts to bring the country's more than 50-year-long civil war to an end. A revised peace deal was signed the following month and submitted to Congress for approval. The House of Representatives unanimously approved the plan on November 30, a day after the Senate gave its backing.
Sources: en.wikipedia.org
=== Political changes === The revolution brought Romania vast attention from the outside world. Initially, much of the world's sympathy went to the FSN government under Ion Iliescu, a former member of the CPR leadership and a Ceaușescu ally prior to falling into the dictator's disfavour in the early 1980s. The FSN, composed mainly of former members of the second echelon of the CPR, immediately assumed control over the state institutions, including the main media outlets such as the national radio and television networks. They used their control of the media to launch attacks against their political opponents, newly created political parties that claimed to be successors to those existing before 1948. Around the same time, all Romanian numbers stations ceased transmitting, including a number station called "Ciocârlia/The Skylark", also known as "V01" after the revolution. Much of that sympathy was squandered during the Mineriads. Massive protests erupted in downtown Bucharest as political rallies organised by the opposition parties during the presidential elections, with a small part of the protesters deciding to stand ground even after Iliescu was re-elected with an overwhelming majority of 85%. Attempts by police to evacuate the remaining protesters resulted in attacks on state institutions, prompting Iliescu to appeal to the country's workers for help. Infiltrated and instigated by former Securitate agents, in the following days a large mass of workers, mainly miners, entered Bucharest and attacked and fought with anti-government protesters and gathered bystanders.
Johnny Kastl is an American lawyer and former actor, perhaps best known for his recurring role as Dr. Doug Murphy on the medical comedy Scrubs (2001–2009). He made cameo appearances in several Hollywood productions and played other parts on television, including the role of Todd Jaracki on The Beast (2009).
Disinfecting uses a chemical product, which is a process that kills the germs on the surfaces. In most situations, regular cleaning of surfaces with soap and detergent, not necessarily disinfecting those surfaces, is enough to reduce the risk of COVID-19 spread. Disinfection is only recommended in indoor settings — schools and homes — where there has been a suspected or confirmed case of COVID-19 within the last 24 hours. In most situations, regular cleaning of surfaces with soap and detergent, not necessarily disinfecting those surfaces, is enough to reduce the risk of COVID-19 spread." The CDC issued a special report "Knowledge and Practices Regarding Safe Household Cleaning and Disinfection for COVID-19 Prevention" due to the increased number of calls to poison centers regarding exposures to cleaners and disinfectants since the onset of the COVID-19 pandemic, concluding that "Public messaging should continue to emphasize evidence-based, safe cleaning and disinfection practices to prevent SARS-CoV-2 transmission in households, including hand hygiene and cleaning and disinfection of high-touch surfaces." CDC provides a Guideline for Disinfection and Sterilization in Healthcare Facilities.
Sources: en.wikipedia.org
Cardarine is a common name for GW501516, a synthetic PPARδ agonist developed for research. It has not been approved as a medication in any country. It is classified as an unapproved drug and a prohibited substance in sport.
No. Cardarine is not an anabolic steroid; it belongs to a different chemical class that targets PPARδ. Steroids act primarily through androgen receptors, while cardarine acts through a nuclear receptor involved in metabolism.
Some rodent studies reported increased endurance and changes in fat metabolism after cardarine exposure. Long-term studies in animals also raised concerns about cancer in certain tissues. Human trial data are limited, so these findings cannot be directly translated to people.
Cardarine is commonly known as GW501516 or GW-1516. These names refer to the same synthetic compound. It is not a brand-name approved medicine.