This is a working overview of anti-doping, written for readers who want more than a one-paragraph summary but less than a textbook.
This page was last updated on 2025-12-29 and is reviewed periodically as new material appears.
Several misconceptions surround SR9009. It is often described as a SARM, a steroid, or an exercise pill, but its known target is the REV-ERB receptor family. Rodent studies have examined exercise capacity and metabolic markers, yet human outcomes remain unproven. Oral bioavailability appears low in animals, and human pharmacokinetics are not well characterized. Online products may contain impurities or different compounds, so identity and purity testing are important for research use.
Analytical chemists detect SR9009 with liquid chromatography-tandem mass spectrometry, commonly abbreviated LC-MS/MS. Sample preparation may involve protein precipitation, liquid-liquid extraction, or solid-phase extraction before analysis. Laboratories can target the parent compound or its metabolites, depending on the matrix and the purpose of testing. Anti-doping methods require sensitive and specific assays because concentrations in biological samples can be low. Reference standards and validated methods are essential for reliable identification and quantification.
Regulatory agencies have not approved SR9009 for human therapeutic use. It is typically sold as a research chemical with labels stating that it is not for human consumption. The World Anti-Doping Agency prohibits the substance in sport, generally under the category of non-approved substances. Customs and national laws may restrict importation, sale, or possession. Product quality and legal status can vary by country and vendor, and therapeutic claims are not permitted in regulated advertising because the compound lacks approval.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Research-use-only status in many markets |
| WADA status | Prohibited in sport | Generally listed as a non-approved substance |
| Detection technique | LC-MS/MS | Common for urine and blood analysis |
| Common alias | Stenabolic | Informal market nickname, not a pharmacopoeial name |
| Purity check | HPLC or LC-UV | Independent certificate of analysis is typical |
SR9009 is not approved as a medicine by major regulatory agencies. It is commonly sold as a research chemical, a category that may fall outside customary drug approval and quality rules. In sports, the World Anti-Doping Agency lists SR9009 as a prohibited substance. Athletes who use it can face sanctions if it is detected in a sample. Legal status varies by country, and importation may be restricted. Enforcement practices differ across borders.
Detection of SR9009 in biological samples usually employs liquid chromatography coupled with tandem mass spectrometry. This method can identify the parent compound and sometimes metabolites in urine or blood. Because exposure can be low and clearance may be rapid, sample timing and limits of detection matter. Laboratories validate assays for sensitivity and specificity. Results are interpreted alongside chain-of-custody and quality-control records. Urine is the common matrix for anti-doping analysis, while blood may be used in research settings.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
== Nomenclature == Despite formal recommendation to the contrary, the term partition coefficient remains the predominantly used term in the scientific literature. In contrast, the IUPAC recommends that the title term no longer be used, rather, that it be replaced with more specific terms. For example, partition constant, defined as
== Prevention == Infections can be prevented by antiseptic measures such as sterilizing the skin prior to piercing it with the needle of a syringe and by proper care of indwelling catheters. Surgical and dental instruments are also sterilized to prevent infection by bacteria. Disinfectants such as bleach are used to kill bacteria or other pathogens on surfaces to prevent contamination and further reduce the risk of infection. Bacteria in food are killed by cooking to temperatures above 73 °C (163 °F).
is known as the Lamb vector. For the special case of an incompressible flow, the pressure constrains the flow so that the volume of fluid elements is constant: isochoric flow resulting in a solenoidal velocity field with
777 was the owner of low-cost carrier Flair Airlines. In June 2022, the Canadian Transportation Agency ruled that Flair is a Canadian airline and can fly domestically, as 777 owns 25% of the shares and had limited its influence on the board since the beginning of the CTA investigation. On March 11, 2023, Airborne Capital Ltd. seized four of its planes operated by Flair over alleged non-payment. In a press conference, Flair CEO Stephen Jones suggested the seizures were motivated by competitors, and that the airline owed around US$1 million on the leases, and was in the process of making payment when the seizures occurred. The lessor, Airborne alleged that Flair had repeatedly missed payments amounting to several millions of dollars over a period of five months. Flair used other aircraft to continue to operate its schedule. In January 2024, it was reported that the lessors had filed claims at the UK High Court for costs and that there had been outstanding payments of $1.8 million on the four aircraft when notice of default was served. In August 2024, interim CEO Maciej Wilk said that 777's stake in Flair was down to 10% and the company's involvement was mostly as a lender, having no presence in the boardroom.
Sources: en.wikipedia.org
=== Tertiary structure === GALE structure has been resolved for a number of species, including E. coli and humans. GALE exists as a homodimer in various species. While subunit size varies from 68 amino acids (Enterococcus faecalis) to 564 amino acids (Rhodococcus jostii), a majority of GALE subunits cluster near 330 amino acids in length. Each subunit contains two distinct domains. An N-terminal domain contains a 7-stranded parallel β-pleated sheet flanked by α-helices. Paired Rossmann folds within this domain allow GALE to tightly bind one NAD+ cofactor per subunit. A 6-stranded β-sheet and 5 α-helices comprise GALE's C-terminal domain. C-terminal residues bind UDP, such that the subunit is responsible for correctly positioning UDP-glucose or UDP-galactose for catalysis.
=== Allied conferences, Polish governments === From the time of the Tehran Conference in late 1943, there was broad agreement among the three Great Powers (the United States, the United Kingdom, and the Soviet Union) that the locations of the borders between Germany and Poland and between Poland and the Soviet Union would be fundamentally changed after the conclusion of World War II. Stalin's view that Poland should be moved far to the west was accepted by Polish communists, whose organizations included the Polish Workers' Party and the Union of Polish Patriots. The communist-led State National Council, a quasi-parliamentary body, was in existence in Warsaw from the beginning of 1944. In July 1944, a communist-controlled Polish Committee of National Liberation was established in Lublin, to nominally govern the areas liberated from German control. The move prompted protests from Prime Minister Stanisław Mikołajczyk and his Polish government-in-exile. By the time of the Yalta Conference in February 1945, the communists had already established a Provisional Government of the Republic of Poland. The Soviet position at the conference was strong because of their decisive contribution to the war effort and as a result of their occupation of immense amounts of land in central and eastern Europe. The Great Powers gave assurances that the communist provisional government would be converted into an entity that would include democratic forces from within the country and active abroad, but the London-based government-in-exile was not mentioned.
An even better isolation of veratridine from veratrine is achieved using high-performance liquid chromatography (HPLC); as commercially available veratridine may vary in purity, HPLC purification of veratrine is a preferred method for isolation of veratridine for biological studies.
Sources: en.wikipedia.org
== Research == According to a study released in 2015, a stop gain mutation in HBB gene (p. Gln40stop) was shown to be associated with ESR values in Sardinian population. The red blood cell count, whose values are inversely related to ESR, is affected in carriers of this SNP. This mutation is almost exclusive of the inhabitants of Sardinia and is a common cause of beta thalassemia. According to a 2010 study, there is a reverse correlation between ESR and general intelligence (IQ) in Swedish males aged 18–20.
=== Efforts to reduce recreational use in the US === In 2011, the Obama administration released a white paper describing the administration's plan to deal with the opioid crisis. The administration's concerns about addiction and accidental overdosing have been echoed by numerous other medical and government advisory groups around the world. As of 2015, prescription drug monitoring programs exist in every state except for Missouri. These programs allow pharmacists and prescribers to access patients' prescription histories in order to identify suspicious use. However, a survey of US physicians published in 2015 found that only 53% of doctors used these programs, while 22% were not aware that the programs were available to them. The Centers for Disease Control and Prevention (CDC) was tasked with establishing and publishing a new guideline, and was heavily lobbied. In 2016, the CDC published its Guideline for Prescribing Opioids for Chronic Pain, recommending that opioids only be used when benefits for pain and function are expected to outweigh risks, and then used at the lowest effective dosage, with avoidance of concurrent opioid and benzodiazepine use whenever possible. Research suggests that the prescription of high doses of opioids related to chronic opioid therapy (COT) can at times be prevented through state legislative guidelines and efforts by health plans that devote resources and establish shared expectations for reducing higher doses. On 10 August 2017, Donald Trump declared the opioid crisis a (non-FEMA) national public health emergency.
Paracetamol, also known as acetaminophen, is a medication used to treat pain and fever. It is typically used for mild to moderate pain. In combination with opioid pain medication, paracetamol is now used for more severe pain such as cancer pain and after surgery. It is typically used either by mouth or rectally but is also available intravenously. Effects last between two and four hours. Paracetamol is classified as a mild analgesic, and is generally safe at recommended doses.
In January 2020, astronomers reported that silicon carbide grains from the Murchison meteorite had been determined to be presolar material. The oldest of these grains was found to be 3 ± 2 billion years older than the 4.54 billion years age of the Earth and Solar System, making it the oldest material found on Earth to date.
Sources: en.wikipedia.org
Legality depends on the country and the intended use. In many places it is not approved as a medicine and may be sold only as a research chemical. Importation or possession can be restricted, and sports organizations prohibit it.
Anti-doping laboratories typically use LC-MS/MS to detect SR9009 or its metabolites in urine or blood. The exact assay depends on the laboratory and the testing program. Detection can be challenging because the compound may be rapidly metabolized and present at low levels.
Stenabolic is an informal nickname used in online fitness and research-chemical markets, not an official drug name. It likely references reported effects on endurance in rodent studies. The nickname does not imply approval or proven human benefit.
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.