Everything below concerns HPLC-UV. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-06-25. Numbers and descriptions here follow the published literature rather than marketing material.
Most published work on SR9009 consists of preclinical studies. It is widely sold as a research chemical, a category that does not imply safety, efficacy, or pharmaceutical-grade quality. Sports anti-doping organizations have listed SR9009 as a prohibited substance, and its presence in an athlete sample can lead to sanctions. Legal status differs by country; in several jurisdictions it is not approved for human consumption and may be treated as an unapproved new drug.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. It is not a steroid, peptide, or natural hormone. In scientific literature, it appears under the code SR9009 and in non-scientific contexts as Stenabolic. The compound was identified through chemical screening efforts aimed at targeting circadian clock components. Its status remains investigational, and no regulatory agency has approved it as a human medicine.
REV-ERB proteins help regulate daily cycles in gene expression, including genes tied to lipid and glucose metabolism. SR9009 binds these receptors and alters their activity in cell and animal experiments. Consequences observed in rodents include changes in skeletal muscle oxidative capacity, blood lipid levels, and exercise performance. The precise chain from receptor occupancy to whole-body effects is still an active area of study. Human responses cannot be assumed from rodent data.
Regulatory treatment of SR9009 varies by country and context. It is not approved as a therapeutic drug by agencies such as the United States Food and Drug Administration or the European Medicines Agency. Sports authorities list it as a prohibited substance; the World Anti-Doping Agency classifies it among hormone and metabolic modulators. Legal status for personal possession or sale differs across jurisdictions, and some countries may restrict it under analog or research chemical laws. Buyers who seek verified material often rely on independent laboratory testing because online product labels may not match contents.
Laboratory samples of SR9009 are typically handled as research chemicals rather than pharmaceuticals. Suppliers usually state that the material is for research use only and not for human or veterinary administration. Storage recommendations generally call for a freezer at approximately −20 °C, protection from light, and a desiccated environment. The solid is often described as a white to off-white powder. Solubility is commonly reported in organic solvents such as dimethyl sulfoxide and ethanol, with low solubility in water.
| Property | Value | Notes |
|---|---|---|
| Common name | SR9009 | Also referred to as Stenabolic in non-scientific contexts. |
| Chemical class | Synthetic small molecule | Not a steroid or peptide hormone. |
| Receptor target | REV-ERBα and REV-ERBβ | Nuclear receptor agonist in preclinical studies. |
| Development status | Investigational | No approved human therapeutic indication. |
| Regulatory attention | Prohibited in sport | Listed by anti-doping authorities. |
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
Detection in biological samples can be complicated by rapid metabolism and low circulating concentrations. Some studies report phase I and phase II metabolites, and analytical methods may need to target those species in addition to the parent compound. Immunoassays are not broadly available, so mass spectrometry remains the main confirmatory approach. For anti-doping testing, laboratories look for SR9009 and its metabolites using validated LC-MS methods. Open questions include how long metabolites remain detectable and how different routes of administration alter detection windows.
In laboratory settings, SR9009 is typically characterized by liquid chromatography–mass spectrometry (LC-MS) or high-performance liquid chromatography with ultraviolet detection (HPLC-UV). These methods can confirm identity and estimate purity, but they require reference standards for accurate quantification. Because SR9009 is not a licensed pharmaceutical, no harmonized pharmacopeial monograph exists. Laboratories often validate in-house methods for matrices such as plasma, urine, or cell culture media. Sample preparation may involve protein precipitation or liquid-liquid extraction before analysis.
== Disease relevance == Due to its involvement in a great number of signaling pathways, GSK-3 has been associated with a host of high-profile diseases. GSK-3 inhibitors are currently being tested for therapeutic effects in Alzheimer's disease, type 2 diabetes mellitus (T2DM), some forms of cancer, and bipolar disorder. There is evidence that lithium, which is used as a treatment for bipolar disorder, acts as a mood stabilizer by selectively inhibiting GSK-3. The mechanism through which GSK-3 inhibition may stabilize mood is not known, though it is suspected that the inhibition of GSK-3's ability to promote inflammation contributes to the therapeutic effect. Inhibition of GSK-3 also destabilises Rev-ErbA alpha transcriptional repressor, which has a significant role in the circadian clock. Elements of the circadian clock may be connected with predisposition to bipolar mood disorder. GSK-3 activity has been associated with both pathological features of Alzheimer's disease, namely the buildup of amyloid-β (Aβ) deposits and the formation of neurofibrillary tangles. GSK-3 is thought to directly promote Aβ production and to be tied to the process of the hyperphosphorylation of tau proteins, which leads to the tangles. Due to these roles of GSK-3 in promoting Alzheimer's disease, GSK-3 inhibitors may have positive therapeutic effects on Alzheimer's patients and are currently in the early stages of testing. In a similar fashion, targeted inhibition of GSK-3 may have therapeutic effects on certain kinds of cancer.
Looksmaxxing (; LUUKS-MAK-sing) is an online self-improvement practice from the manosphere focused on maximizing one's physical attractiveness. The term is a neologism which was coined on incel message boards in the 2010s. Previously, the phrase had limited usage on obscure internet forums of the incelosphere, but was popularized on TikTok by primarily male content creators in the 2020s. Based on white supremacy, the term has commonly been associated with the black pill ideology, which espouses that female sexual selection is primarily based on external physical qualities such as height and facial attractiveness, while qualities such as kindness and personality are ignored or even cause rejection. Looksmaxxing methods range from benign practices such as skincare routines and gym use, to more extreme interventions such as invasive cosmetic surgery and injection of anabolic steroids, human growth hormone and other peptides. Commentators generally criticize the concept as being judgemental and harmful to its practitioners ("looksmaxxers"). Communities and influencers associated with the practice are described as rating individual's appearance without concern for their overall well-being which can lead to negative mental health outcomes such as body dysmorphia and suicidal ideation. The increasing popularity of the concept has also led to concerns over its potential to promote hegemonic masculinity.
Paralogous genes can shape the structure of whole genomes and thus explain genome evolution to a large extent. Examples include the Homeobox (Hox) genes in animals. These genes not only underwent gene duplications within chromosomes but also whole genome duplications. As a result, Hox genes in most vertebrates are clustered across multiple chromosomes with the HoxA-D clusters being the best studied. Another example are the globin genes which encode myoglobin and hemoglobin and are considered to be ancient paralogs. Similarly, the four known classes of hemoglobins (hemoglobin A, hemoglobin A2, hemoglobin B, and hemoglobin F) are paralogs of each other. While each of these proteins serves the same basic function of oxygen transport, they have already diverged slightly in function: fetal hemoglobin (hemoglobin F) has a higher affinity for oxygen than adult hemoglobin. Function is not always conserved, however. Human angiogenin diverged from ribonuclease, for example, and while the two paralogs remain similar in tertiary structure, their functions within the cell are now quite different. It is often asserted that orthologs are more functionally similar than paralogs of similar divergence, but several papers have challenged this notion. In collaborative work, Anton Yuryev and co-authors demonstrated that genome-wide protein–protein interaction networks contain a significantly higher frequency of self-interacting proteins (homodimers) and interactions between paralogous proteins than would be expected by chance.
== Sources == Crick, Francis (1990). What Mad Pursuit: a Personal View of Scientific Discovery (reprint ed.). New York: Basic Books. ISBN 0-465-09138-5. Maddox, Brenda (2002). Rosalind Franklin: the dark lady of DNA. London: HarperCollins. ISBN 0-06-018407-8. Olby, Robert (2009). Francis Crick: Hunter of Life's Secrets. Cold Spring Harbor Laboratory Press. ISBN 978-0-87969-798-3. Ridley, Matt (2006). Francis Crick: Discoverer of the Genetic Code. Ashland, OH: Atlas Books. ISBN 0-06-082333-X. Wilkins, Maurice (2003). The Third Man of the Double Helix: The Autobiography of Maurice Wilkins. Oxford University Press. ISBN 0-19-860665-6.
Valve is an American video game developer and publisher founded in 1996 by Gabe Newell and Mike Harrington. The company is based in Bellevue, Washington. Valve's first game was Half-Life, a first-person shooter released in 1998. It sold over nine million retail copies. Alongside Half-Life's launch, Valve released development tools to enable the player community to create content and mods. The company then proceeded to hire the creators of popular mods such as Counter-Strike. Valve continued their trend of developing predominantly first-person video games in the 2000s with a number of critically successful releases. In 2004, they released the highly anticipated sequel Half-Life 2 through their own digital distribution service Steam. The game sold over 10 million copies and was met with acclaim. Valve released two subsequent episodes for Half-Life 2 and later packaged those games together with the puzzle game Portal and the multiplayer shooter Team Fortress 2 in a collection known as The Orange Box. By the end of 2008, combined retail sales of the Half-Life series, Counter-Strike series and The Orange Box had surpassed 32 million units. Newell also projected that digital sales of Valve's games would eventually exceed retail sales as Steam continued to grow. In the late 2000s, Valve released two zombie-themed first-person shooters focusing on cooperative gameplay with the Left 4 Dead series. The company continued to release multiplayer games with the launches of Counter-Strike: Global Offensive and Dota 2, both of which have large esports communities fostered by Valve.
Sources: en.wikipedia.org
=== Sepsis === Measurement of procalcitonin can be used as a marker of severe sepsis caused by bacteria and generally grades well with the degree of sepsis, although levels of procalcitonin in the blood are very low. PCT has the greatest sensitivity (90%) and specificity (91%) for differentiating patients with systemic inflammatory response syndrome (SIRS) from those with sepsis, when compared with IL-2, IL-6, IL-8, CRP and TNF-alpha. Evidence is emerging that procalcitonin levels can reduce unnecessary antibiotic prescribing to people with lower respiratory tract infections. Currently, procalcitonin assays are widely used in the clinical environment. A meta-analysis reported a sensitivity of 76% and specificity of 70% for bacteremia. A 2018 systematic review comparing PCT and C-reactive protein (CRP) found PCT to have a sensitivity of 80% and a specificity of 77% in identifying septic patients. In the study, PCT outperformed CRP in diagnostic accuracy of predicting sepsis. In a 2018 meta-analysis of randomized trials of over 4400 ICU patients with sepsis, researchers concluded that PCT led therapy resulted in lower mortality and lower antibiotic administration.
== Research == Cuatrecasas is known for the invention and development of affinity chromatography, a process utilized within the Aethlon HemopurifierTM. He was involved in the discovery, development and marketing registration of more than forty medicines. Some of those medicines include: zidovudine (AZT, AIDS), acyclovir (Zovirax, anti-herpes), permethrin (Rid, head and body lice), bupropion (Wellbutrin, antidepressant), colfosceril palmitate (Exosurf, infant acute respiratory distress), remifentanil (Ultiva, analgesic/anesthetic), sumatriptan (Imigran, migraine), salmeterol (Serement, asthma), tacrine (Cognex, Alzheimers), gabapentin (Neurontin, epilepsy and neuropathic pain), troglitazone (Rezulin, diabetes), and atorvastatin (Lipitor, cholesterol lowering). In 1987, Cuatrecasas was awarded the Wolf Prize in Medicine in 1987 along with Meir Wilchek "for the invention and development of affinity chromatography and its applications to biomedical sciences."
== Clinical Applications == Since dermal fibroblasts play a critical role in wound healing, researchers are attempting to generate mature dermal fibroblasts to repair second and third degree burns. When the body sustains a third degree burn, the skin's dermal layer is completely destroyed by heat (and the all fibroblast cells within the wound site perish). Without fibroblasts, the wound site cannot regenerate extracellular matrix and epidermis skin cells cannot proliferate over the wound site. Therefore, without dermal fibroblasts the skin cannot properly recover from injury. Yet, by differentiating mesenchymal stem cells from other regions of the body and injecting them into the wound site, scientists can restore dermal fibroblasts to burned regions of the body. By restoring fibroblasts to the burned regions, the body can restore the ECM within the wound site and recover from the injury. As noted "The injured dermis is also repaired by the recruitment and proliferation of fibroblasts producing extracellular matrix and keratinocyte growth promoting factors." Similarly, FGF is being inserted into fibrin sealants to enhance the long term repair and sealing of tissue. FGF-1 has been experimentally shown to encourage the body’s own adhesive tissue to develop and effectively seal the wound (thereby stymieing infection and mitigating scar formation). Using FGF stimulate fibroblast activity is a more effective means of sealing tissue than current tissue sealants due to the robust nature of collagen which makes up connective tissue.
== External links == Biggest Collection of Medical Abbreviations Glossary of Medical Terms - Tufts University Medical Abbreviations EN English Medical Abbreviations for Android JD.MD, Inc. online Medical & Dental Abbreviations Glossary Acronyms for Medical & Dental professional organizations Medical Abbreviations for iPhone Medical abbreviations on mediLexicon Medical acronyms and abbreviations on allacronyms.com Over 20,000 medical abbreviations sorted into specialist categories Medical abbreviations in various categories such as Physiology, Oncology, Laboratory and more
Sources: en.wikipedia.org
It is a synthetic compound studied as an agonist of REV-ERB nuclear receptors. It is not an approved medicine and has mainly been examined in laboratory and animal research.
No. It is a small molecule that binds nuclear receptors involved in circadian regulation. Its classification differs from anabolic steroids or peptide hormones.
Published human clinical trial data are lacking. Most safety and activity information comes from preclinical models, so effects in people remain uncertain.
Legality depends on the country and the intended use. In many places it is sold as a research chemical, but sports and medicine regulations restrict it.