A practical reference on Anti-doping: what it is, how it behaves, what the literature reports, and where the honest uncertainties sit.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
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.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | PPARδ agonist | Not an anabolic steroid. |
| Common synonyms | GW501516, GW-1516 | Cardarine is an informal name. |
| Appearance | White to off-white powder | Typical for research-grade solid. |
| Solubility class | Poorly soluble in water; soluble in some organic solvents | Such as DMSO or ethanol in laboratory settings. |
| Typical storage temperature | Cool, dry, protected from light | Specific conditions vary by supplier and form. |
Detection of GW501516 in biological samples generally relies on liquid chromatography coupled with tandem mass spectrometry. Urine is a common matrix in anti-doping analysis, while blood or plasma may be used in research settings. Sample preparation can involve enzymatic hydrolysis, protein precipitation, or solid-phase extraction before instrumental analysis. Because the compound undergoes metabolism, assays may target the parent molecule, one or more metabolites, or both. Detection windows are not fixed; they depend on factors such as dose, route, individual metabolism, and assay sensitivity. Reference standards are required for accurate identification and quantification.
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.
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.
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.
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.
== Source == GsMTx-4 was isolated from the venom of Grammostola spatulata. After a blocking effect on mechanosensitive channels of the spider venom was detected in 1996, GsMTx-4 was isolated and identified from the venom later in 2000. Its concentration in the venom is ~2 mM.
== Detection == The high concentration of DPA in and specificity to bacterial endospores has long made it a prime target in analytical methods for the detection and measurement of bacterial endospores. A particularly important development in this area was the demonstration by Rosen et al. of an assay for DPA based on photoluminescence in the presence of terbium, although this phenomenon was first investigated for using DPA in an assay for terbium by Barela and Sherry.
Misuzu Henderson (観鈴・ヘンダーソン, Misuzu Hendaason) Voiced by: Yoko Hikasa Leader of the "Kasai" Reformist group. She's called "Gozen" and organized the attack on the Town of Winter where Hinagiku was kidnapped. In the past, Misuzu's father was the leader of the Insurgents. Misuzu once had a daughter, but her daughter died, leaving Misuzu traumatized. Feeling powerless, Misuzu decides to kidnap, ransom, and kill agents. She becomes obsessed with Hinagiku, whom she attempts to brainwash into acting as her daughter. After eight years of Misuzu's mental and physical torture, it finally becomes Misuzu's fatal mistake, especially of trying to impregnant Hinagiku with one of her henchmen. Hinagiku finally snaps and destroys the Insurgent base and escapes. Misuzu survives and goes into hiding, attempting to rebuild the organization in the meantime. Misuzu saw Nadeshiko and decided to do same thing she did to Hinagiku. Despite being nearly killed by Hinagiku, Misuzu wanted to recapture her. Mikami (美上, Mikami) Voiced by: Hinata Tadokoro Misuzu's right-hand man. He has strong feelings for Misuzu despite his desire to leave the Reformists and start a new life.
Simon enters the previously chained-up apartment and, after a long hallway where he hears a doctor describing an encounter with his patient and being attacked yet again, finds the fuses. While attempting to retrieve the fuses again to open a gate for a train, he enters another nightmare where he is chased through a maze by monsters hanging from the ceiling, escaping through a door that opens back up to a completely different hallway. After boarding the train, Simon is attacked by monsters yet again, and the train eventually crashes and derails, causing him to lose all of his belongings. As the train is about to fall off a cliff, Simon narrowly escapes and finds himself in a dark forest. Deep in the forest, Simon discovers an asylum as the doctor enters. Simon finds the doctor behind a gate where the doctor orders him to hand him a new gun in exchange for letting him pass. Simon can either oblige or refuse, but regardless, the doctor ends up betraying Simon and shoots him (with a greater penalty to maximum health if Simon complied). Simon eventually kills the doctor after a gunfight. Simon leaves the forest and rows a boat across a lake to his hometown. He finally reaches his house and expects his mother to be waiting for him, but the house is empty. He enters his bedroom and finds a book. Through a flashback, the player finds out that the entire story was a figment of Simon's imagination. After the car crash, Simon became reliant on a wheelchair. Depressed, his therapist (who was the doctor in the game) advised him to document his feelings in a book.
By the late 20th century, new fields like genomics and proteomics were reversing this trend, with organismal biologists using molecular techniques, and molecular and cell biologists investigating the interplay between genes and the environment, as well as the genetics of natural populations of organisms.
Sources: en.wikipedia.org
The involvement of the king's son-in-law Iñaki Urdangarín in the corruption scandal known as the Nóos affair caused enormous damage to the image of the monarchy, as polls immediately reflected. The first official reaction of the Casa del Rey came on December 12, 2011, when it was decided to remove Urdangarín from official acts due to his "non-exemplary" behavior. In the Christmas Message the king spoke of "justice being equal for all". Four days later, Urdangarín was charged and between Saturday 25 and Sunday February 26, 2012, he had to testify before the judge in Palma de Mallorca. Another hard blow to the prestige of the monarchy came two months later, when on April 14, 2012, it was learned that King Juan Carlos had broken his hip on an elephant hunt in Botswana and that he had been rushed to Madrid for surgery. The news sparked a huge controversy that forced the king to apologize when he left the clinic. "I am very sorry. I made a mistake and it won't happen again," he said. On November 21, 2013, the king underwent another hip operation. It was the third surgery in less than a year, and the ninth in the last five. At the first official act in which he intervened, the celebration of Pascua Militar on January 6, 2014, he appeared tired and unwell. Just one day later, the judge of the Nóos affair, José Castro Aragón, charged the infanta Cristina de Borbón for the second time – the first had been dismissed the previous year by the Audiencia de Palma – for money laundering and tax crimes.
A blood smear, peripheral blood smear or blood film is a thin layer of blood smeared on a glass microscope slide and then stained in such a way as to allow the various blood cells to be examined microscopically . Blood smears are examined in the investigation of hematological (blood) disorders and are routinely employed to look for blood parasites, such as those of malaria and filariasis.
It is formed as result of various attractive forces like hydrogen bonding, disulfide bridges, hydrophobic interactions, hydrophilic interactions, van der Waals force etc. When two or more polypeptide chains (either of identical or of different sequence) cluster to form a protein, quaternary structure of protein is formed. Quaternary structure is an attribute of polymeric (same-sequence chains) or heteromeric (different-sequence chains) proteins like hemoglobin, which consists of two "alpha" and two "beta" polypeptide chains.
=== Treatment research === The sugar cyclodextrin (CD) removed cholesterol that had built up in the arteries of mice fed a high-fat diet. CD is absorbed into the mouse bloodstream. It increases the production of oxysterols in macrophages and plaques, which causes the activation of LXR in macrophages. This, in turn, causes the macrophages to be more capable of cholesterol efflux and makes them more anti-inflammatory.
Sources: en.wikipedia.org
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.
No, cardarine is not a steroid. It is classified as a PPARδ agonist. Its structure and receptor target differ from anabolic steroids.
No regulatory agency has approved cardarine as a medicine. It was investigated in early research but development was discontinued. It is not available as a prescription drug.
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.