If you have been reading about circadian rhythm and want a single page that covers the useful parts, this is it: definitions, context, how it is studied, and the questions that come up repeatedly.
Last reviewed on 2025-10-22. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Molecular formula | C20H24ClN3O4S | Derived from published structure. |
| Molecular weight | 437.94 g/mol | Calculated value. |
| Appearance | White to off-white solid | Typical for purified research samples. |
| Solubility | DMSO, ethanol; low in water | Class: poorly water-soluble. |
| Typical storage | -20 °C, desiccated, protected from light | Limits degradation. |
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.
Analytical methods for SR9009 typically rely on liquid chromatography coupled with tandem mass spectrometry. The technique can separate the parent compound from related substances and detect low concentrations in biological matrices. Urine and blood are common samples in anti-doping testing, while in vitro studies may use cell culture media. Rapid metabolism and low expected concentrations make method validation important for reliable identification. Exact metabolite patterns can vary by species and are not fully mapped.
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.
=== Insulin pricing === In January 2019, lawmakers from the United States House of Representatives sent letters to Eli Lilly and other insulin manufacturers asking for explanations for rapidly raising insulin prices. The annual cost of insulin for people with type 1 diabetes in the US almost doubled from $2,900 to $5,700 over the period from 2012 to 2016. Renewed attention was brought to Eli Lilly's pricing of insulin in November 2022, after a verified Twitter account impersonating Eli Lilly posted on Twitter that insulin would now be free. The following year, the company announced that it would be reducing the out-of-pocket price of insulin to $35 a month. The company also stated that it would lower the price of Humalog from $275 a month to $66 and that it would offer insulin glargine at a 78% discount compared to rival company Sanofi. Despite this, the reduced costs will not apply to Eli Lilly's newer brands of insulin, and the company's pricing is still significantly higher than it was several decades prior.
Meldal's innovation became the paradigmatic reaction of Click Chemistry. One set of particularly significant reports regarding azide couplings came from the Bertozzi lab who conducted the reaction within living cells. In 2022, the Nobel Prize in Chemistry was jointly awarded to Carolyn R. Bertozzi, Morten P. Meldal, and Karl Barry Sharpless, "for the development of click chemistry and bioorthogonal chemistry".
As part of Lenin's pragmatic compromise with external financial interests in 1918, Bolshevik state capitalism temporarily returned 91% of industry to private ownership or trusts until the Soviet Russians learned the technology and the techniques required to operate and administrate industries. Importantly, Lenin declared that the development of socialism would not be able to be pursued in the manner originally thought by Marxists. A key aspect that affected the Bolshevik regime was the backward economic conditions in Russia that were considered unfavourable to orthodox Marxist theory of communist revolution. At the time, orthodox Marxists claimed that Russia was ripe for the development of capitalism, not yet for socialism. Lenin advocated the need of the development of a large corps of technical intelligentsia to assist the industrial development of Russia and advance the Marxist economic stages of development as it had too few technical experts at the time. In that vein, Lenin explained it as follows: "Our poverty is so great that we cannot, at one stroke, restore full-scale factory, state, socialist production." He added that the development of socialism would proceed according to the actual material and socio-economic conditions in Russia and not as abstractly described by Marx for industrialised Europe in the 19th century. To overcome the lack of educated Russians who could operate and administrate industry, Lenin advocated the development of a technical intelligentsia who would propel the industrial development of Russia to self-sufficiency.
Sources: en.wikipedia.org
Trading Corporation of Pakistan (TCP) is the principal trading arm of the Government of Pakistan. Established as an international trading house in 1967, the corporation has gradually moved from barter, through commodity exchange to cash trade. TCP undertakes import of essential commodities to help ensure their availability to the common man at affordable prices.
On 9 November 1918, Philipp Scheidemann, a Social Democrat, proclaimed the German Republic, marking Germany's transition to a federal democratic state. Germany's new leadership signed the Treaty of Versailles in 1919, accepting defeat by the Allies. Germans perceived the treaty as humiliating, which was seen by historians as influential in the rise of Adolf Hitler. Germany lost around 13% of its European territory and ceded all of its colonial possessions. On 11 August 1919, President Friedrich Ebert signed the democratic Weimar Constitution. Communists briefly seized power in Bavaria and a few larger cities, while conservative elements failed to overthrow the central government in the 1920 Kapp Putsch. The occupation of the Ruhr by Belgian and French troops and a period of hyperinflation followed. A plan to restructure Germany's war reparations and the creation of a new currency in 1924 helped stabilise the government and ushered in the Golden Twenties, an era of artistic innovation and liberal cultural life. In 1929, the Great Depression hit Germany, and by 1932 the unemployment rate had risen to nearly 30%. The Nazi Party led by Adolf Hitler became the largest party in the Reichstag after the election of July 1932, and President Hindenburg appointed Hitler as chancellor on 30 January 1933. After the Reichstag fire, a decree abrogated basic civil rights, and the first Nazi concentration camp opened. On 23 March 1933, the Enabling Act gave Hitler unrestricted legislative power, overriding the constitution, and marked the beginning of Nazi Germany.
=== Scientific criticism === Herbalism has been criticized as a potential "minefield" of unreliable product quality, safety hazards, and the potential for misleading health advice. Globally, there are no uniform standards across various herbal products to authenticate their contents, safety or efficacy, and there is generally an absence of high-quality scientific research on product composition or effectiveness for anti-disease activity. Presumed claims of therapeutic benefit from herbal products, without rigorous evidence of efficacy and safety, receive skeptical views by scientists. Unethical practices by some herbalists and manufacturers, which may include false advertising about health benefits on product labels or literature, and contamination or use of fillers during product preparation, may erode consumer confidence about services and products.
Sources: en.wikipedia.org
SR9009 is a synthetic REV-ERB agonist used in laboratory research. It is not an approved drug, and its effects in humans are not well characterized. It is often sold as a research chemical under the name Stenabolic.
No. SR9009 targets the nuclear receptors REV-ERBα and REV-ERBβ, not the androgen receptor. This mechanism differs from selective androgen receptor modulators and from exercise mimetics that act on PPARδ.
Published evidence is mainly preclinical, using cell cultures and animal models. Controlled human trials are not well documented in the public literature. Claims about human performance or health effects therefore remain unsupported by robust clinical data.
SR9009 is a synthetic research compound that acts on REV-ERB nuclear receptors. It is not approved for human use and is sold only as a research chemical. Its effects have been studied mainly in cells and rodents.