bioavailability is one of those subjects where the details matter more than the headlines. This page pulls together the background, the mechanisms, and the practical points readers ask about most.
Last reviewed on 2025-08-21. Where a claim depends on a specific study, the study is described rather than over-claimed.
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 |
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.
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.
SR9009 is a synthetic small molecule studied as an agonist of REV-ERB nuclear receptors. REV-ERB alpha and REV-ERB beta help regulate circadian rhythms and metabolic gene expression. In laboratory research, SR9009 has been used to probe how these receptors affect skeletal muscle, liver, and adipose tissue. The compound was identified in academic drug-discovery work and is often described in scientific literature by its chemical name and research code. It is not an approved medicine, and human clinical data remain limited or absent.
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.
At the molecular level, SR9009 binds REV-ERBα and REV-ERBβ and alters their repressive activity on target genes. These nuclear receptors help regulate the circadian clock, lipid synthesis, glucose metabolism, and inflammatory pathways. By changing transcription, the compound can shift the timing or magnitude of downstream metabolic processes in model systems. It does not act through androgen receptors or adenosine receptors, which distinguishes it from several substances sold for athletic performance. Whether the same transcriptional changes occur in humans at tolerable exposures remains an open question because controlled human studies are lacking.
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.
=== Reports === "Combattre les violences faites aux femmes" [Combating violence against women] (in French). Archived from the original on April 23, 2021. "Bilan de l'application des dispositifs promouvant l'égalité professionnelle entre femmes et hommes" [Review of the implementation of measures promoting professional equality between women and men] (in French). Archived from the original on April 23, 2021. "Femmes éloignées du marché du travail" [Women who are distant from the labor market] (in French). Archived from the original on January 28, 2021. "Kit pour agir contre le sexisme" [Kit to take action against sexism] (in French). November 14, 2016. Retrieved May 8, 2025. "Le sexisme dans le monde du travail" [Sexism in the workplace] (PDF). Conseil Supérieur de l'égalité professionnelle (in French). Archived from the original (PDF) on March 31, 2015. "Écart de rémunération entre hommes et femmes en Europe : faits et chiffres" [Gender pay gap in Europe: facts and figures]. Parlement Européen (in French). March 4, 2020. Archived from the original on January 23, 2021.
=== Organ meats/offal === Lamb's liver, known as lamb's fry in New Zealand and Australia, is eaten in many countries. It is the most common form of offal eaten in the UK, traditionally used in the family favourite and pub grub staple of liver with onions, potentially also with bacon and mashed potatoes. It is a major ingredient, along with the lungs and heart (the pluck), in the traditional Scottish dish of haggis. Lamb testicles or lamb fries are a delicacy in many parts of the world. Lamb kidneys are found in many cuisines across Europe and the Middle East, often split into two halves and grilled (on kebabs in the Middle East), or sautéed in a sauce. They are generally the most highly regarded of all kidneys. Lamb sweetbreads are a delicacy in many cuisines.
=== The origin of plasmapheresis === Dr. José Antonio Grifols Lucas, a scientist from Vilanova i la Geltrú, Spain, founded Laboratorios Grifols in 1940. Dr. Grifols pioneered a first-of-its-kind technique called plasmapheresis, where a donor's red blood cells would be returned to the donor's body almost immediately after the separation of the blood plasma. This technique is still in practice today, almost 80 years later. In 1945, Dr. Grifols opened the world's first plasma donation center.
The associated enzymes are subject to regulation via feedback inhibition and/or repression at the genetic level. As is typical in highly branched metabolic pathways, additional regulation at each branch point of the pathway. This type of regulatory scheme allows control over the total flux of the aspartate pathway in addition to the total flux of individual amino acids. The aspartate pathway uses L-aspartic acid as the precursor for the biosynthesis of one-fourth of the building block amino acids.
Sources: en.wikipedia.org
The mechanism of this sub-type of muscular dystrophy consists of a mutation in the FKTN gene which results in a malformed fukutin protein. It is thought that fukutin modifies the alpha-dystroglycan protein, which is important in anchoring cells to certain molecules, specifically including some proteins. Alpha-dystroglycan in skeletal muscles helps to prevent the breakdown of muscle fibers through stabilization and protection. Alpha-dystroglycan also helps brain development by assisting in the migration of neurons. Most frequently, FKTN is mutated in such a way that creates a shortage of fukutin in the cell, which in turn creates problems during formation of alpha-dystroglycan leading to less stabilization of muscle cells. Use of the destabilized muscle fibers over time causes them to break down and a gradual decline in muscle tone and atrophy of muscle fibers occurs. The decline in cerebral fukutin causes neuronal cells to continue moving beyond their intended destination. Additionally, oxidative stress has some effect on astrocytes (as well as, neurons) when fukutin is subdued.
=== Pharmacokinetics === While riluzole is typically taken twice-daily and on an empty stomach, troriluzole may offer a potential once-daily dosing with or without food along with greater bioavailability.
The midterm elections are scheduled to be held on November 3. In the federal government, the offices up for election are all 435 seats of the House of Representatives, and roughly one third of the Senate. Most states and territories will hold elections for their governors and legislatures. In the Senate, nine senators have announced their intention not to seek re-election this cycle, including five Republicans and four Democrats. Republican seats in Maine, North Carolina, and Ohio are seen as vulnerable, while Democrats will be defending seats in Georgia, Michigan, and New Hampshire. In the House, numerous states have redrawn their congressional districts ahead of the election, with Republicans attempting to strengthen their narrow margins. On the state level, 36 states and three territories will hold gubernatorial elections, and most states and territories will hold elections for their legislatures. Many major cities, including Long Beach, Los Angeles, Louisville, Newark, Oakland, Oklahoma City, St. Petersburg, and Washington, D.C., will also elect their mayors and municipal governments.
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.