Everything below concerns WADA Prohibited List. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Last reviewed on 2025-09-20. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
Human trials of GW501516 were small and short in duration. They examined lipid levels, glucose handling, and other metabolic markers, but the programs were halted after the animal cancer findings. No approved therapeutic product exists, and published human data are insufficient for establishing long-term safety. Reports of use for athletic performance come mainly from non-clinical settings and cannot be verified through controlled trials. Independent testing of products sold as cardarine has found inconsistent purity and labeling.
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 |
|---|---|---|
| Primary target | PPARδ (NR1C2) | Nuclear receptor involved in lipid metabolism |
| Preclinical effect | Increased fatty acid oxidation | Observed in rodent studies |
| Key safety signal | Tumors in rodents after long-term exposure | Contributed to halted clinical development |
| Human trial status | No approved product; development stopped | Limited short-term metabolic data |
| Sport regulatory status | Prohibited at all times | WADA hormone and metabolic modulators class |
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.
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.
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.
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.
A persistent misconception is that cardarine is a fat-burning drug or a safe alternative to anabolic steroids. No approved therapeutic product exists, and human safety data are limited. The tumor findings in rodents remain a central concern in scientific reviews. Products sold online may contain inaccurate labels, impurities, or different compounds entirely, which complicates any assessment of effects. Independent testing of such products has reported frequent mislabeling. For these reasons, discussions in the literature emphasize risks and unknowns rather than benefits.
Cardarine is not approved for human therapeutic use in any major jurisdiction. It appears on the World Anti-Doping Agency Prohibited List as a PPARδ agonist within the hormone and metabolic modulators category. Sports organizations test for it because it has been detected in athlete samples and seized products. Regulatory actions against marketed research chemical versions have occurred in several countries, though enforcement varies. Availability through unregulated channels complicates oversight.
Analytical laboratories typically identify cardarine and its metabolites using liquid chromatography-tandem mass spectrometry. Urine is a common matrix in anti-doping testing, while blood and tissue may be used in research settings. Detection windows depend on the assay, the sample matrix, and the compound's metabolism. Because cardarine is extensively metabolized, laboratories often target specific metabolites to improve sensitivity and confirmation. Reference standards are required for reliable quantification. Method validation includes checks for selectivity, linearity, and carryover.
Cytoplasmic hypereosinophilia on samples with H&E stain. It is seen as a darker stain of the cytoplasm. The cell membrane appears discontinuous when viewed with an electron microscope. This discontinuous membrane is caused by cell blebbing and the loss of microvilli. On a larger histologic scale, pseudopalisades (false palisades) are hypercellular zones that typically surround necrotic tissue. Pseudopalisading necrosis indicates an aggressive tumor.
Through studying the transport of biogenic substances in the Tatar Strait in the Sea of Japan, a Russian team noted that biogenic substances can enter the marine environment due to input from either external sources, transport inside the water masses, or development by metabolic processes within the water. They can likewise be expended due to biotransformation processes, or biomass formation by microorganisms. In this study the biogenic substance concentrations, transformation frequency, and turnover were all highest in the upper layer of the water. Additionally, in different regions of the strait the biogenic substances with the highest annual transfer were constant. These were O2, DOC, and DISi, which are normally found in large concentrations in natural water. The biogenic substances that tend to have lower input through the external boundaries of the strait and therefore least transfer were mineral and detrital components of N and P. These same substances take active part in biotransformation processes in the marine environment and have lower annual output as well.
20 September - 9 March 1970 Operation Diamond Arrow was an RLA operation to retain control of the strategic road intersection of Routes 16 and 23 at Thatheng in southern Laos. The RLA successfully defended Thatheng and killed an estimated 500 PAVN/Pathet Lao for the loss of 40 killed and 30 missing but ultimately abandoned the position on 4 April.
Any condition that results in the production of abnormal hemoglobin is included under the broad category of hemoglobinopathies. Worldwide, it is estimated that 7% of the population may carry a hemoglobinopathy with clinical significance. The most well known condition in this group is sickle cell disease. Newborn screening for a large number of hemoglobinopathies is done by detecting abnormal patterns using isoelectric focusing, which can detect many different types of abnormal hemoglobins. In the United States, newborn screening for sickle cell disease was recommended for all infants in 1987, however it was not implemented in all 50 states until 2006. Early identification of individuals with sickle cell disease and other hemoglobinopathies allows treatment to be initiated in a timely fashion. Penicillin has been used in children with sickle cell disease, and blood transfusions are used for patients identified with severe thalassemia.
Sources: en.wikipedia.org
=== Cellulose nanocrystals === Cellulose nanocrystals (CNCs), or nanocrystalline cellulose (NCC), are highly crystalline, rod-like nanoparticles. They are usually covered by negatively charged groups that render them colloidally stable in water. They are typically shorter than CNFs, with a typical length of 100 to 1000 nanometers.
=== Objective list theories === Objective list theories state that a person's well-being depends on several factors. These factors can include subjective components, like pleasure and desire-satisfaction, but also encompass objective factors that enhance a person's well-being independent of whether they subjectively care about them. Objective list theorists have proposed diverse lists of items to cover a wide variety of elements contributing to well-being, such as health, friendship, achievement, knowledge, and autonomy. Some versions argue that each element on the list is valuable by itself, while others hold that they complement each other and only promote well-being when combined. One criticism of objective list theories asserts that they define an incoherent concept of well-being by including diverse elements that have little in common. Another objection challenges the proposed objectivity of objective list theories, arguing that well-being is essentially a subjective phenomenon. According to this view, what is good for a person depends on their subjective attitude, and imposing an external definition of what is good leads to alienation.
Remains may be exhumed and reburied en masse when a cemetery is relocated, once local planning and religious requirements are met. It also enables construction agencies to clear the way for new constructions. One example of this is cemeteries in Chicago next to O'Hare International Airport to expand the runways. The remains of the Venerable or the Blessed are sometimes exhumed to ensure their bodies lie in their correctly marked graves, as their gravesites usually become places for devotees to gather, and also to collect relics. The bodies may also be transferred to a more dignified place. It also serves the purpose to see if they are supernaturally Incorrupt. An incorrupt corpse is no longer considered miraculous, but it is a characteristic of several known saints. Exhumation is no longer a requirement in the beatification process, but still may be carried out. For ethical and cultural reasons, repatriation and reburial of human remains may be carried out when museums and academic institutions return remains to their place of origin.
Sources: en.wikipedia.org
== Pharmacokinetics == Some pharmacokinetic data on hyperforin is available for an extract containing 5% hyperforin. Maximal plasma levels (Cmax) in human volunteers were reached 3–4 hours after administration of an extract containing 14.8 mg hyperforin. Biological half-life (t1/2) and mean residence time were 9 hours and 12 hours, respectively, with an estimated steady state plasma concentration of 100 ng/mL (approx. 180 nM) for 3 doses per day. Linear plasma concentrations were observed within a normal dosage range and no accumulation occurred. In healthy male volunteers, 612 mg dry extract of St. John's wort produced hyperforin pharmacokinetics characterized by a half-life of 19.64 hours.
On 1 October, the Israeli military began an invasion of southern Lebanon, also known as the Third Lebanon War by some Israeli sources, and announced that Israel had been carrying out small covert raids into Lebanon for months. The IDF announced that it had launched "limited, localized and targeted raids" against targets with strategic importance to Hezbollah. An Israeli strike on a house in Al-Dawoudiya killed at least 10 people and injured five others. Hours after the initial Israeli raids began, Iran launched ballistic missiles against Israel, citing "terrorist acts of the Zionist regime" such as the assassination of Hassan Nasrallah as justification for the attack. On 3 October, six days after Nasrallah's assassination, his successor, Hashem Safieddine, was also assassinated during an Israeli airstrike in Beirut. Israel kept the extent of its campaign vague. On 29 October, IDF officers said that while some Lebanese villages still pose a threat to Israel, most military goals in Lebanon border area were fulfilled and conditions were created to cement Israel's achievements in ceasefire negotiations. On 26 November, hours after IDF troops reached the Litani River, Prime Minister of Israel Benjamin Netanyahu announced the transfer of a sixty-day ceasefire deal to the Security Cabinet of Israel. Support for the deal in the Israeli government was "unanimous". The deal involved Hezbollah operatives withdrawing to the north of the Litani River, and Israel withdrawing from Lebanon at the end of the sixty days.
Alsos Digital Library – Radioactive Waste (annotated bibliography) Euridice European Interest Group in charge of Hades URL operation (link) Ondraf/Niras, the waste management authority in Belgium (link) Critical Hour: Three Mile Island, The Nuclear Legacy, And National Security (PDF) Environmental Protection Agency – Yucca Mountain[link removed] (documents) Grist.org – How to tell future generations about nuclear waste (article) International Atomic Energy Agency – Internet Directory of Nuclear Resources (links) Nuclear Files.org – Yucca Mountain (documents) Nuclear Regulatory Commission – Radioactive Waste (documents) Nuclear Regulatory Commission – Spent Fuel Heat Generation Calculation (guide) Radwaste Solutions (magazine) UNEP Earthwatch – Radioactive Waste Archived 2008-12-23 at the Wayback Machine (documents and links) World Nuclear Association – Radioactive Waste Archived 2010-06-11 at the Wayback Machine (briefing papers) Worries can't be buried as nuclear waste piles up, Los Angeles Times, January 21, 2008
== Warnings/Precautions == Pancreatitis has been reported in clinical trials, do not continue usage if any pancreatitis has been spotted or confirmed, other therapies should be considered in patients with a prior history of pancreatitis Hypoglycemia has been noted when used in combination with an insulin secretagogue or insulin, consider lowering the usage of insulin in order to reduce the risk of hypoglycemia Hypersensitivity reactions such as anaphylactic reactions and angioedema have occurred; in this case discontinue Trulicity/dulaglutide and seek medical advice Acute kidney injury, monitor the renal function in patients with renal impairment and report severe gastrointestinal reactions Severe gastrointestinal disease, as usage may sometimes be associated with severe gastrointestinal reactions. (Source)
Sources: en.wikipedia.org
Rodent studies reported increased endurance and fat oxidation after GW501516 exposure. Long-term studies also found higher rates of some tumors, which led to halted development.
Small short-term human trials examined metabolic markers such as lipids and glucose. The trials did not continue after rodent cancer findings, so long-term human safety is unknown.
Controlled human trials have not established a performance benefit. Anecdotal reports exist, but they are not reliable evidence.
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.