Everything below concerns unapproved substance. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2025-09-24. Numbers and descriptions here follow the published literature rather than marketing material.
Safety discussions about cardarine frequently cite rodent carcinogenicity findings reported in the 2000s. In those studies, treated animals developed tumors at multiple sites, leading sponsors to discontinue clinical development. The relevance of these findings to humans has not been resolved, but they are a major reason the compound is not approved. Current literature emphasizes uncertainty about long-term effects and the risks of unregulated use. Regulators and health agencies have not established a safe human exposure level.
Cardarine is a synthetic compound also known as GW501516, GW-501516, and sometimes endurobol. It was developed as a selective agonist of peroxisome proliferator-activated receptor delta, a nuclear receptor involved in fatty acid oxidation and energy metabolism. The compound was studied in preclinical models for metabolic and cardiovascular conditions, but it did not become a marketed human medicine. In regulatory and anti-doping contexts, it is treated as a prohibited substance rather than a licensed medicine.
The pharmacological interest in cardarine centers on PPARδ activation and its downstream effects on lipid handling and mitochondrial function. In animal studies, PPARδ agonists have been associated with changes in exercise endurance and fatty acid utilization, though results vary by model and protocol. Human data remain sparse, and the absence of large controlled trials limits conclusions about efficacy. Researchers often describe the compound as a tool for probing PPARδ biology rather than a proven therapeutic agent.
Regulatory treatment varies, but cardarine is not approved as a medicine. Sports authorities list GW501516 as a prohibited substance, and it is banned at all times under the World Anti-Doping Agency code. Many countries restrict sales for human consumption, while online vendors market it as a research chemical. Such products may lack purity data, and their actual contents can differ from the label. Purchasing or possessing cardarine may carry legal consequences depending on jurisdiction. The compound is not a dietary supplement ingredient in regulated markets.
Clinical development stopped after rodent studies showed tumors at multiple sites. Whether those findings predict human cancer risk remains an open question, but they led sponsors to discontinue programs. Human safety data are limited to small, short-term studies that were not designed to assess cancer risk. Reported effects in those studies included changes in blood lipids, but the evidence is insufficient for medical use. Long-term consequences of nonmedical use are not well characterized. Questions about dose, duration, and individual susceptibility remain unresolved.
Cardarine is a common name for GW501516, an investigational compound developed in the 1990s for metabolic conditions. It acts as an agonist at peroxisome proliferator-activated receptor delta, a nuclear receptor involved in lipid and energy metabolism. The compound is frequently mislabeled as a selective androgen receptor modulator, or SARM, but its molecular target is different. GW501516 reached early clinical testing before development was discontinued. It has no approved therapeutic use in any country. The name cardarine is not a formal international nonproprietary name.
| Property | Value | Notes |
|---|---|---|
| Common synonyms | GW501516, GW-501516, GW 501516, endurobol | Names vary in research and anti-doping documents. |
| Chemical class | Synthetic PPARδ agonist | Small-molecule nuclear receptor ligand. |
| CAS Registry Number | 317318-70-0 | Identifier commonly associated with GW501516. |
| Appearance | White to off-white powder | Typical for purified research material. |
| Solubility | Low in water; soluble in DMSO and ethanol | Organic solvents are common for laboratory stock solutions. |
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.
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.
Anti-doping laboratories detect GW501516 and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is the most common matrix, though blood and dried blood spots may also be used in some programs. Detection depends on factors such as dose, timing, metabolism, and the sensitivity of the assay. Published methods describe limits of detection in the low nanogram per milliliter range for related compounds. Exact detection windows are not fixed for all situations and remain an area of ongoing study.
Products sold as cardarine have been found to contain incorrect compounds, variable amounts, or no active ingredient at all. Independent testing is required to verify identity and purity. Common analytical approaches include high-performance liquid chromatography, mass spectrometry, and nuclear magnetic resonance for structural confirmation. These methods can distinguish GW501516 from related PPAR agonists and from unrelated steroids. For regulators and researchers, such verification is central to interpreting both biological results and adverse event reports.
Cardarine is prohibited in competitive sport under the World Anti-Doping Agency code, where it is classified as a metabolic modulator. It is not approved as a prescription medicine in the United States, European Union, or other major markets. Regulatory action has focused on its presence in sports and in products marketed as research chemicals. Because it has no accepted medical indication, supply is often unregulated. This status creates legal and safety uncertainties for anyone who encounters the substance.
Laboratory studies indicate that GW501516 activates PPARδ, a nuclear receptor involved in fatty acid oxidation and energy metabolism. In rodent experiments, treated animals often showed increased endurance and reduced fat mass. These effects were observed under controlled conditions and do not establish safe or effective use in humans. The exact dose-response relationship in humans remains poorly characterized. Species differences in metabolism can affect how results translate across animals and people.
Safety concerns emerged from long-term animal studies. In rodents given the compound for extended periods, researchers found an increased incidence of certain cancers, including liver and bladder tumors. These findings contributed to the discontinuation of clinical development. Whether similar risks apply to short-term or low-level exposure in humans is not established, and controlled human safety data are limited. The relevance of high-dose rodent carcinogenicity findings to human use remains a subject of debate.
Two days later, the most serious event occurred: "ultras" gunmen burst into the office of some labor lawyers linked to the Comisiones Obreras and the Communist Party, located in Atocha street in Madrid, and put against the wall eight of them and a janitor, shooting then. Five members of the firm died on the spot and four others were seriously wounded. But the 1977 Atocha massacre did not achieve its objective of creating a climate evoking the civil war. On the contrary, it raised a wave of solidarity with the Communist Party, which gathered in the streets an orderly and silent crowd to attend the burial of the murdered communist militants. The Army, therefore, had no reason to intervene and not even the government decreed a state of emergency, as claimed by the extreme right. And when it seemed that the crisis had been overcome the GRAPO reappeared, who like the extreme right also wanted to stop the process of political transition, and kidnapped the president of the Supreme Council of Military Justice, General Emilio Villaescusa Quilis ─ while they still held Antonio María de Oriol, president of the Council of State, hostage ─ and killed three policemen. But neither the Suárez government nor the Army fell for the provocation on this occasion either.
2015: Edgar Savisaar, Estonian politician, had his right leg amputated. He got the disease during a trip to Thailand. 2018: Alex Smith, an American football quarterback for the Washington Football Team of the National Football League (NFL), contracted the disease after being injured during a game. He suffered an open compound fracture in his lower leg, which became infected. Smith narrowly avoided amputation and eventually returned to playing professional football in October 2020. Smith's injury and recovery is the subject of the ESPN documentary E60 Presents: Project 11. 2019: OG Maco contracted NF after an untreated rash. 2021: Irish actor Barry Keoghan revealed in 2024 that he contracted NF shortly before filming The Banshees of Inisherin and nearly had his arm amputated.
The validation scope, boundaries and responsibilities for each process or groups of similar processes or similar equipment's must be documented and approved in a validation plan. These documents, terms and references for the protocol authors are for use in setting the scope of their protocols. It must be based on a Validation Risk Assessment (VRA) to ensure that the scope of validation being authorised is appropriate for the complexity and importance of the equipment or process under validation. Within the references given in the VP the protocol authors must ensure that all aspects of the process or equipment under qualification; that may affect the efficacy, quality and or records of the product are properly qualified. Qualification includes the following steps:
Morgan Freeman (born June 1, 1937) is an American actor, producer, and narrator. In a career spanning six decades, he has received numerous accolades, including an Academy Award and a Golden Globe Award, as well as a nomination for a Grammy Award and a Tony Award. He was honored with the Kennedy Center Honor in 2008, an AFI Life Achievement Award in 2011, the Cecil B. DeMille Award in 2012, and Screen Actors Guild Life Achievement Award in 2018. In a 2022 readers' poll by Empire, he was voted one of the 50 greatest actors of all time. Born in Memphis, Tennessee, Freeman was raised in Mississippi, where he began acting in school plays. He studied theater arts in Los Angeles and appeared in stage productions in his early career. He rose to fame in the 1970s for his role in the children's television series The Electric Company. Freeman then appeared in the Shakespearean plays Coriolanus and Julius Caesar, the former of which earned him an Obie Award. In 1978, he was nominated for the Tony Award for Best Featured Actor in a Play for his role as Zeke in the Richard Wesley play The Mighty Gents. Freeman received the Academy Award for Best Supporting Actor playing a former boxer in Clint Eastwood's sports drama Million Dollar Baby (2004). He was Oscar-nominated for Street Smart (1987), Driving Miss Daisy (1989), The Shawshank Redemption (1994), and Invictus (2009). He also performed in Glory (1989), Lean on Me (1989), Robin Hood: Prince of Thieves (1991), Unforgiven (1992), Se7en (1995), Amistad (1997), Deep Impact (1998), Gone Baby Gone (2007), and The Bucket List (2007).
Sources: en.wikipedia.org
=== Firestone recall and legal mandates === The Firestone recall in the late 1990s (which was linked to more than 100 deaths from rollovers following tire tread-separation), pushed the United States Congress to legislate the TREAD Act. The Act mandated the use of a suitable TPMS technology in all light motor vehicles (under 10,000 lb (4,500 kg)), to help alert drivers of under-inflation events. This act affects all U.S. light motor vehicles sold after September 1, 2007. Phase-in started in October 2005 at 20%, and reached 100% for models produced after September 2007. In the United States, as of 2008 and the European Union, as of November 1, 2012, all new passenger car models (M1) released must be equipped with a TPMS. From November 1, 2014, all new passenger cars sold in the European Union must be equipped with a TPMS. For N1 vehicles (trucks up to 3.5 tonnes), TPMS are not mandatory, but if a TPMS is fitted, it must comply with the regulation. On July 13, 2010, the South Korean Ministry of Land, Transport and Maritime Affairs announced a pending partial-revision to the Korea Motor Vehicle Safety Standards (KMVSS), specifying that "TPMS shall be installed to passenger vehicles and vehicles of GVW 3.5 tons or less, ... [effective] on January 1, 2013 for new models and on June 30, 2014 for existing models". Japan is expected to adopt European Union legislation approximately one year after European Union implementation. Further countries to make TPMS mandatory include Russia, Indonesia, the Philippines, Israel, Malaysia and Turkey.
Leaders reaffirmed support for Ukraine's sovereignty and territorial integrity, agreed to increase deliveries of air defence systems, interceptors and long-range capabilities, and said they would strengthen sanctions on Russia, including in the oil and gas sectors. The statement also supported Ukraine's energy resilience through the following winter and said G7 members were ready to consider extending licences to increase Ukrainian military production. The statement on the Middle East welcomed the announcement of a deal between the United States and Iran and said G7 members were ready to contribute to its implementation. It also supported efforts to resume maritime traffic through the Strait of Hormuz and called for diversified energy supply routes and higher energy stocks. It also supported efforts to disarm Hezbollah in Lebanon, accelerate humanitarian and reconstruction efforts in Gaza, and end violence in the West Bank.
== Safety and potential drug interactions == L-arginine is recognized as safe (GRAS-status) at intakes of up to 20 grams per day. L-arginine is found in many foods, such as fish, poultry, and dairy products, and is used as a dietary supplement. It may interact with various prescription drugs and herbal supplements.
== Skin == The stratum corneum – the outermost layer of the epidermis – is composed of terminally differentiated and enucleated corneocytes within a lipid matrix. Together with cholesterol and ceramides, free fatty acids form a water-impermeable barrier that prevents evaporative water loss. Generally, the epidermal lipid matrix is composed of an equimolar mixture of ceramides (about 50% by weight), cholesterol (25%), and free fatty acids (15%). Saturated fatty acids 16 and 18 carbons in length are the dominant types in the epidermis, while unsaturated fatty acids and saturated fatty acids of various other lengths are also present. The relative abundance of the different fatty acids in the epidermis is dependent on the body site the skin is covering. There are also characteristic epidermal fatty acid alterations that occur in psoriasis, atopic dermatitis, and other inflammatory conditions.
Historically, the birth rate of teenagers peaked in the late 1950s and early 1960s. However, at that time, most teenage parents were married. In the early twenty-first century, nine in ten births to the age group 15-19 are to unmarried mothers. Social norms have changed; it is now not unusual for teenagers to delay or avoid sexual intercourse altogether. Younger teenagers are more likely to practice abstinence than their older counterparts. A report published by the Center for Disease Control and Prevention (CDC) in early 2018 found the number of high school students who have had sex fell from 47% in 2005 down to 41% in 2015, with the most dramatic drop taking place between 2013 and 2015. On top of that, among never-married teens who have had sex, overwhelming majorities reported they used contraception the first time they did it. There are a few reasons for this. First, Millennials and Generation Z are more focused on the consequences of sex than their predecessors were. Second, there has been growing concern over unwanted sexual advances, especially in the wake of the Me-too movement. Writing for The Spectator, Douglas Murray dubbed this the "sexual counter-revolution." Third, as a consequence of the precarious contemporary economy, young adults today are more likely to be living with their parents rather than on their own, with a romantic partner, or a spouse. A 2016 analysis by the CDC discovered that teenage birthrates nosedived between 1991, when they reached a crisis point, and 2014, when they dropped by 60%, a record low.
Sources: en.wikipedia.org
by correcting the error – entering a new value for example or when the datapoint is updated by marking the variable as correct – some EDC systems required additional response or you can raise a further query if you are not satisfied with the response
=== Other applications === One of the most desirable uses for protein design is for biosensors, proteins that will sense the presence of specific compounds. Some attempts in the design of biosensors include sensors for unnatural molecules including TNT. More recently, Kuhlman and coworkers designed a biosensor of the PAK1. In a sense, protein design is a subset of battery design.
Bromazepam, sold under many brand names, is a benzodiazepine. It is mainly an anti-anxiety agent with similar side effects to diazepam. In addition to being used to treat anxiety, bromazepam may be used as a premedication prior to minor surgery. Bromazepam typically comes in doses of 1.5 mg, 3 mg and 6 mg tablets. It was patented in 1961 by Roche and approved for medical use in 1974.
=== Preparation of non-silica aerogels === Resorcinol–formaldehyde aerogel (RF aerogel) is made in a way similar to production of silica aerogel. A carbon aerogel can then be made from this resorcinol–formaldehyde aerogel by pyrolysis in an inert gas atmosphere, leaving a matrix of carbon. The resulting carbon aerogel may be used to produce solid shapes, powders, or composite paper. Additives have been successful in enhancing certain properties of the aerogel for the use of specific applications. Aerogel composites have been made using a variety of continuous and discontinuous reinforcements. The high aspect ratio of fibers such as fiberglass have been used to reinforce aerogel composites with significantly improved mechanical properties.
=== AI skills shortage === The UK AI sector faces a critical and worsening skills shortage. The AI Labour Market Survey 2025, commissioned by DSIT and published in January 2026, found that 97% of surveyed organisations identified at least one gap in AI-related skills in the labour market, and that 57% reported a technical skills gap. The most significant gap identified was in understanding AI concepts and algorithms, with 28% of organisations reporting that technical skills shortages had directly impacted their ability to achieve business goals. Women account for only 20% of AI roles, a figure that has fallen by four percentage points since 2020, and 41% of firms do not employ people from minority ethnic backgrounds, exacerbating the talent pipeline constraint through underrepresentation.
Sources: en.wikipedia.org
Cardarine is an investigational synthetic compound that acts as a PPARδ agonist. It is also known as GW501516 and has been studied mainly in preclinical research. It is not an approved medicine.
No. Cardarine is not a steroid hormone; it targets the nuclear receptor PPARδ. Its classification in anti-doping rules differs from anabolic steroids, though it remains prohibited in sport.
Early rodent studies reported tumor formation at multiple sites, which raised safety concerns. Sponsors stopped clinical development, and no approved human product exists.
No. Cardarine is GW501516, a PPARδ agonist, while SARMs act on androgen receptors. The two classes are often grouped in informal discussions despite different mechanisms.