This is a working overview of bioavailability, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2026-08-01. Anything still debated is marked as such rather than presented as settled.
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.
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.
Regulatory treatment of SR9009 reflects its investigational status. The compound has no approved human therapeutic indication, and sports authorities prohibit its use. It appears on anti-doping lists as a non-approved substance or metabolic modulator, depending on the list version. Products sold online as research chemicals are not quality-controlled medicines, so their identity and purity can differ from the label. Such products may also contain unlisted compounds, which complicates both testing and safety assessment.
Scientific discussion of SR9009 often separates animal evidence from human anecdote. Rodent studies provide controlled data on endurance, metabolism, and gene expression, but they use specific strains, doses, and treatment durations. Human reports are mostly uncontrolled and cannot establish cause and effect. Open questions include oral bioavailability, tissue distribution, metabolic stability, and long-term effects. Review articles generally call for more rigorous pharmacokinetic and safety research before any clinical use could be considered.
| 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 |
Identity and purity testing for SR9009 commonly uses liquid chromatography coupled with tandem mass spectrometry. This method separates the compound from matrix components and detects it by mass-to-charge transitions, providing sensitive and specific confirmation. Nuclear magnetic resonance spectroscopy can support structural identification, while high-performance liquid chromatography with ultraviolet detection may estimate purity. Because online products labeled as SR9009 may contain other substances or no active compound at all, independent verification is important in research settings. Certificates of analysis are useful but not a substitute for in-house testing.
Laboratory samples of SR9009 are typically supplied as a white to off-white powder. The compound dissolves readily in organic solvents such as dimethyl sulfoxide and ethanol, while its solubility in water is low. Because of this solubility profile, researchers often prepare concentrated stock solutions in an organic solvent before diluting them into aqueous assay buffers. Light exposure, moisture, and repeated freeze-thaw cycles can degrade many small molecules, so handling procedures usually aim to minimize these factors. Purity is commonly checked before use.
Storage conditions for research-grade SR9009 generally involve a freezer at approximately minus twenty degrees Celsius, sometimes lower for long-term preservation. Containers should remain tightly closed and protected from light. Desiccants may be used to limit moisture uptake. Solutions are often stored in aliquots to avoid repeated warming and cooling. Stability data for the compound under various conditions are limited, so laboratories typically follow supplier recommendations and verify performance through periodic analytical checks rather than assuming indefinite stability.
SR9009 binds REV-ERB receptors and alters their repressive activity on target genes. This action can change transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. In rodent studies, treated animals have shown changes in muscle oxidative capacity and exercise performance, though effects vary by dose, duration, and model. The precise molecular steps connecting receptor binding to whole-body outcomes are still an active area of investigation. Findings in animals do not automatically translate to humans.
Because REV-ERB receptors are core clock components, SR9009 has been examined for effects on daily rhythms as well as metabolism. Research has explored whether the compound can shift or reinforce circadian gene expression in tissues such as liver and muscle. Some studies report improved metabolic markers in obese or diabetic mice, while others show context-dependent responses. Questions remain about which effects are direct, which are secondary to timing, and how they might differ across species.
Preclinical reports describe effects on exercise endurance, mitochondrial content, and lipid profiles in rodents, but these findings come from specific experimental conditions. Many studies use high doses or delivery methods that may not translate directly to human use. SR9009 has been reported to have low oral bioavailability and a short half-life, which complicates interpretation of oral dosing studies. It is not established as safe or effective for any indication. Literature discussions often separate its pharmacological mechanism from unverified claims made in fitness and supplement markets.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not an approved medicine and has no established human therapeutic use. The compound appears in scientific literature as a tool for probing circadian and metabolic regulation. Online sellers often label it as a research chemical, sometimes using the nickname Stenabolic. Its chemical identity is distinct from selective androgen receptor modulators, stimulants, and peroxisome proliferator-activated receptor delta agonists. Researchers use it mainly in cell and animal experiments.
He previously worked as an analyst with the International Crisis Group.; co-founder of J Street and has served on the organization's advisory council; also a founding board member of Molad: The Center for the Renewal of Israeli Democracy as well as the Diaspora Alliance; serves on board of New Israel Fund and as trustee of Rockefeller Brothers Fund; editor with Foreign Policy magazine as editor of their Middle East Channel He publishes and speaks widely on matters related to Israel and Palestine.; has appeared on and written for The Nation, The New York Times, Ha'aretz, the BBC, Al Jazeera, and CNN. Eylon Levy (born London, 1991) is an official Israeli government spokesman, serving since the start of Gaza war. He served previously as international media advisor to President Isaac Herzog, after a career as a television news anchor at i24News and IBA News. Levy's work has appeared in Newsweek, Jerusalem Post, Times of Israel, The Daily Caller, Arutz Sheva/Israel National News, Tablet Magazine, The Washington Post, The Guardian, and The Daily Telegraph. Martin Lewis (financial journalist) (born 9 May 1972) financial journalist and broadcaster, has worked for BBC, Channel 5 (British TV channel), ITV's This Morning (TV programme) and written for The Sunday Post, The Yorkshire Post, the Manchester Evening News, Express & Star, has been a columnist for The Sunday Times, News of the World, The Guardian and the Sunday Express. Tim Lott(born 23 January 1956); author and journalist for The Guardian.
== Activities == The CSCC monitors the quality of testing services and acts as technical experts to evaluate and select methods and instrumentation. They apply their clinical and technical knowledge to assist physicians in selecting and interpreting tests, as well as supporting the laboratory's research and teaching activities. The society also produces publications, including the scientific journal Clinical Biochemistry, a member newsletter CSCC News, and position papers on current issues such as cardiac troponin testing. Special interest groups have been developed to advance knowledge and produce solutions in Clinical Toxicology, Point-Of-Care Testing, Pediatric and Perinatal Biochemistry, Monoclonal Gammopathy, Autoverification of test results, and the Canadian Laboratory Initiative on Paediatric Reference Intervals - CALIPER.
== Historical context == In 1992, Stephen Kent and Martina Schnölzer at The Scripps Research Institute developed the "Chemical Ligation" concept, the first practical method to covalently condense unprotected peptide segments; the key feature of chemical ligation is formation of an unnatural bond at the ligation site. Just two years later in 1994, Philip Dawson, Tom Muir and Stephen Kent reported "Native Chemical Ligation", an extension of the chemical ligation concept to the formation of a native amide ('peptide') bond after initial nucleophilic condensation formed a thioester-linked condensation product designed to spontaneously rearrange to the native amide bond at the ligation site. Theodor Wieland and coworkers had reported the S-to-N acyl shift as early as 1953, when the reaction of valine-thioester and cysteine amino acid in aqueous buffer was shown to yield the dipeptide valine-cysteine. The reaction proceeded through the intermediacy of a thioester containing the sulfur of the cysteine residue. However, Wieland's work did NOT lead to the development of the native chemical ligation reaction. Rather, the study of amino acid thioester reactions led Wieland and others to develop the 'active ester' method for the synthesis of protected peptide segments by conventional chemical methods carried out in organic solvents.
== Overdose == In high doses, overdoses, or in some persons not tolerant to opioids, oxycodone can cause shallow breathing, slowed heart rate, cold/clammy skin, pauses in breathing, low blood pressure, constricted pupils, circulatory collapse, respiratory arrest, and death. In 2011, it was the leading cause of drug-related deaths in the U.S. However, from 2012 onwards, heroin and fentanyl have become more common causes of drug-related deaths.
Sources: en.wikipedia.org
And that's the S&D Group." One of the assistants whose flats were searched (Giuseppe Meroni) works for the EPP member Lara Comi, and the EPP member Maria Spyraki was later also put under investigation by the European Public Prosecutor's Office (EPPO). The S&D Group commissioned an inquiry conducted from March to June 2023 by three independent experts: former MEP Richard Corbett, auditor and governance expert Jean-Pierre Garitte, and expert in economic criminal law Silvina Bacigalupo. They presented their initial report to the Group in July. It warned of a heightened risk of geostrategic interference and geostrategic corruption and warned that the EU institutions need to strengthen their resilience by updating their rules and procedures. It pointed out that the existing regulatory framework laying down ethical requirements for MEPs and staff is distributed over at least 27 different documents at various levels of the legal hierarchy, from treaty-level provisions to EU legislation, inter-institutional agreements, parliamentary rules of procedure, the MEP code of conduct and a range of decisions by the Parliament, its Bureau, the Conference of Presidents and the Secretary General. The report identified some 50 shortcomings in them, from gaps to contradictions, weak wording, unclear obligations and inadequate enforcement. This part of the report fed into the subsequent revision of the European Parliament's Rules of Procedure and the Code of Conduct for Members (see below) adopted in September 2023.
In SN 12.59 and its counterpart SA 284, there is a chain that starts by saying that for someone who "abides in seeing [the Chinese has grasping at] the flavour in enfettering dharmas (saññojaniyesu dhammesu), there comes the appearance (avakkanti) of consciousness." There then follows the standard list. Then it states that if someone abides by seeing the danger (adinavanupassino) in the dharmas (the Chinese has seeing impermanence), there is no appearance of consciousness (Chinese has mind). SN 12.65 and 67 (and SA 287 and 288) begin the chain with both consciousness and name and form conditioning each other in a cyclical relationship. It also states that "consciousness turns back, it goes no further than name and form." SN 12.67 also contains a chain with consciousness and name and form being in a reciprocal relationship. In this sutta, Sariputta states that this relationship is like two sheaves of reeds leaning on each other for support (the parallel at SA 288 has three sheaves instead).
== Maintenance == When maintaining the aquariums for this breed, instead of using substrate, breeders go for driftwood roots or branches, bark of Beech or oak and position them in a way that offers some kind of shades to the fish. To add to the natural environment, dry leaves are also used, which along with the Tannin from the wood, act as a supplement fish food when decomposed. For king bettas, always dim lighting and aquatic vegetation like Microsorum pteropus and Taxiphyllum barbieri is advised. A sprinkling of floating aquatic plants also help to maintain the lighting in the tank. An air-powered sponge filter in place of other forms of filtration gadgets are preferred. As these species tend to make jumps, the tank should be covered, but care should be taken not to fill it to the brim as the fish seek the humid air that develops in the empty space.
Iodine-135 is a neutron-rich isotope of iodine with a half-life of 6.58 hours, and important to nuclear reactor physics. It is produced in relatively large amounts as a fission product, and decays to xenon-135, which is a nuclear poison with the largest known thermal neutron cross section, which is a cause of multiple complications in the control of nuclear reactors. The process of buildup of xenon-135 from accumulated iodine-135 can temporarily preclude restarting a reactor that has been shut down. This is known as xenon poisoning or "falling into an iodine pit".
=== The importance of intracrines in the cardiovascular system === Intracrines play a crucial role in the cardiovascular system by exerting intracellular actions that go beyond traditional extracellular signaling pathways. These factors, including VEGF, PTHrP, and Angiotensin II, influence key processes such as cardiac development, hypertrophy, fibrosis, angiogenesis, and electrical conductivity. By operating within the cells that synthesize them, intracrines regulate gene expression, protein synthesis, and intracellular signaling, allowing for precise control over physiological and pathological responses. The recognition of intracrine signaling has significant implications for cardiovascular disease treatment. Understanding the intracellular mechanisms of these factors opens new therapeutic avenues, particularly for conditions such as heart failure, ischemic heart disease, and arrhythmias. Targeting intracrine pathways could lead to more effective interventions by modulating disease progression at the cellular level rather than relying solely on extracellular receptor blockade. As research continues to uncover the complexities of intracrine physiology, it holds promise for the development of innovative strategies to improve cardiovascular health.
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.
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.