circadian rhythm 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 2026-03-24. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ, also called NR1D1 and NR1D2. These receptors help regulate circadian rhythms and metabolic gene programs. The compound was developed for laboratory research, not as an approved therapeutic. Its identity is distinct from steroid hormones and selective androgen receptor modulators. Scientific interest centers on how REV-ERB activation changes gene expression in cells and animal models.
At the molecular level, SR9009 binds the ligand-binding domain of REV-ERB and strengthens recruitment of corepressor proteins such as NCoR and HDAC3. This increases repression of target genes, including Bmal1 and other clock-controlled and metabolic genes. In rodent studies, such changes have been linked to altered lipid handling, glucose metabolism, and energy expenditure. The precise chain of events between receptor binding and whole-body effects remains an active area of research. Findings in animals do not automatically translate to humans.
Laboratory studies often administer SR9009 by injection because oral absorption appears poor in rodents. Reported pharmacokinetic properties include rapid metabolism and low systemic exposure after oral dosing. Human pharmacokinetic data are sparse, so absorption, distribution, metabolism, and excretion in people are not well defined. Some research explores related REV-ERB compounds with improved drug-like properties. Regulatory approval for any REV-ERB agonist as a human medicine has not been granted to date.
| Property | Value | Notes |
|---|---|---|
| Regulatory status | Not approved for human use | Investigational status in most countries |
| Sports status | Prohibited by WADA | Classified as non-approved or metabolic modulator |
| Common analytical method | LC-MS/MS | Used for trace detection in biological samples |
| Typical test matrices | Urine and blood | Sample choice depends on testing program |
| Human trial data | None published | Effects and safety are not established |
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.
Handling recommendations for SR9009 in a laboratory setting include storing the solid at low temperature, protected from light and moisture. The compound is often dissolved in dimethyl sulfoxide or ethanol for experiments. Solutions should be prepared with appropriate personal protective equipment and disposed of according to local rules. Stability data for long-term storage are limited, so stock solutions are typically kept cold and used within defined periods. Records of preparation date and concentration support reproducibility.
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.
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.
For long-term storage, SR9009 is typically kept as a solid at low temperature, protected from moisture and light. Desiccated conditions limit hydrolysis, while opaque containers reduce photochemical breakdown. Solutions are less stable than solids and are often stored frozen in aliquots to avoid repeated freeze-thaw cycles. Stability data are not standardized across all suppliers, so users should rely on certificate-of-analysis information when available. Degradation may appear as color change, precipitate, or decreased chromatographic purity.
Laboratory identification of SR9009 typically relies on chromatographic separation coupled to mass spectrometry, often with ultraviolet detection as a secondary check. Nuclear magnetic resonance spectroscopy can confirm molecular structure when a reference standard is available. Because many suppliers sell the compound as a research chemical, independent identity testing is important for experimental reproducibility. A single retention time is not sufficient proof of identity, especially when related compounds may be present. Purity assessments usually report a percentage based on area normalization.
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.
Analytical identification and purity assessment often use high-performance liquid chromatography with ultraviolet detection or mass spectrometry. Liquid chromatography–tandem mass spectrometry is used to detect and quantify SR9009 in biological matrices, including urine and blood, for anti-doping or pharmacokinetic studies. Nuclear magnetic resonance spectroscopy can confirm molecular structure. Stability depends on form and storage: the solid is generally more stable than solutions, and repeated freeze–thaw cycles may degrade samples. Purity is typically reported as a percentage from a certificate of analysis.
TATA-binding protein-associated factor 11 (TAF11) assembles the RLC by facilitating Dcr-2-R2D2 tetramerization, which increases the binding affinity to siRNA by 10-fold. Association with TAF11 would convert the R2-D2-Initiator (RDI) complex into the RLC. R2D2 carries tandem double-stranded RNA-binding domains to recognize the thermodynamically stable terminus of siRNA duplexes, whereas Dicer-2 the other less stable extremity. Loading is asymmetric: the MID domain of Ago2 recognizes the thermodynamically stable end of the siRNA. Therefore, the "passenger" (sense) strand whose 5′ end is discarded by MID is ejected, while the saved "guide" (antisense) strand cooperates with AGO to form the RISC. After integration into the RISC, siRNAs base-pair to their target mRNA and cleave it, thereby preventing it from being used as a translation template. Differently from siRNA, a miRNA-loaded RISC complex scans cytoplasmic mRNAs for potential complementarity. Instead of destructive cleavage (by Ago2), miRNAs rather target the 3′ untranslated region (UTR) regions of mRNAs where they typically bind with imperfect complementarity, thus blocking the access of ribosomes for translation. Exogenous dsRNA is detected and bound by an effector protein, known as RDE-4 in C. elegans and R2D2 in Drosophila, that stimulates Dicer activity. The mechanism producing this length specificity is unknown and this protein only binds long dsRNAs. In C.
=== Lean body mass === Studies have found that HGH reduces body fat and increases lean body mass. However, no increase in muscle strength was observed. This may be explained by short-term fluid retention.
=== Hyperthermia === Hyperthermia is an elevation of body temperature over the temperature set point, due to either too much heat production or not enough heat loss. Hyperthermia is thus not considered fever. Hyperthermia should not be confused with hyperpyrexia (which is a very high fever). Clinically, it is important to distinguish between fever and hyperthermia as hyperthermia may quickly lead to death and does not respond to antipyretic medications. The distinction may however be difficult to make in an emergency setting, and is often established by identifying possible causes.
Sources: en.wikipedia.org
=== Restructuring and acquisition by Embracer Group (2015–2024) === Gearbox established Gearbox Publishing in 2015, first announced to the public in December 2016, as to publish third-party games, starting with the remastered version of Bulletstorm from People Can Fly. Pitchford said that it wanted to start expanding into other areas of capital growth beyond games that Gearbox was traditionally known for, and planned to use Gearbox Publishing as a starting point. Later, in May 2019, Gearbox established The Gearbox Entertainment Company, Inc. (Gearbox Entertainment) as a parent company for both Gearbox Software and Gearbox Publishing. Co-founder Landon Montgomery, who had left the company around 2007, died on March 25, 2020. In April 2021, Gearbox Entertainment was wholly acquired by the Embracer Group for precisely $363 million rising to $1.378 billion should it reach specific operational targets. This addition would be the company's seventh major publishing group. Pitchford stated that while it was looking to raise capital from 2016, it came to meet with Embracer, and saw that its decentralized studio model would work well for Gearbox. 2K remained on Gearbox's board and continued to publish the Borderlands series. Gearbox Entertainment opened a second Canadian studio, Gearbox Studio Montreal, in August 2021, to support 250 new staff, bringing the total size of Gearbox to around 850 employees.
=== Fertility === The effect of feminizing hormone therapy on fertility is not clear, but it is known that testosterone suppression can prevent sperm production. The age of starting and stopping hormone therapy seems to be a significant factor, but no direct causation has been found between length of treatment and ability to reproduce. There is some research showing effective restoration of fertility by alternative means than HRT cessation alone. Dr. Will Powers has demonstrated the effectiveness of clomifene in restoring spermatogenesis in trans women. His study also includes an in-depth description of other methods for fertility restoration.
The parish church of St Peter and St Paul stands on Church Road. It was largely destroyed by German bombing on 16 April 1941 and rebuilt in the 1950s incorporating the medieval tower and reusing much of the flint and fragments of the original stone building. The most noteworthy historic building is Bromley College, London Road. The central public open spaces are; Queen's Gardens, Martin's Hill, Church House Gardens, Library Gardens and College Green.
== Occurrence == Pyrite is the most common of sulfide minerals and is widespread in igneous, metamorphic, and sedimentary rocks. It is a common accessory mineral in igneous rocks, where it also occasionally occurs as larger masses arising from an immiscible sulfide phase in the original magma. It is found in metamorphic rocks as a product of contact metamorphism. It also forms as a high-temperature hydrothermal mineral, though it occasionally forms at lower temperatures. Pyrite occurs both as a primary mineral, present in the original sediments, and as a secondary mineral, deposited during diagenesis. Pyrite and marcasite commonly occur as replacement pseudomorphs after fossils in black shale and other sedimentary rocks formed under reducing environmental conditions. Pyrite is common as an accessory mineral in shale, where it is formed by precipitation from anoxic seawater, and coal beds often contain significant pyrite. Notable deposits are found as lenticular masses in Virginia, U.S., and in smaller quantities in many other locations. Large deposits are mined at Rio Tinto in Spain and elsewhere in the Iberian Peninsula.
Sources: en.wikipedia.org
==== Heterozygous ==== MODY is inherited in an autosomal dominant fashion, and most patients therefore have other members of the family with diabetes; penetrance differs between the types (from 40% to 90%).
==== Actions ==== RO5073012 has high affinity for the mouse, rat, cynomolgus monkey, and human TAAR1 (Ki = 0.5–6 nM), is highly potent and selective as an agonist of the TAAR1 of these species (EC50Tooltip half-maximal effective concentration = 8.8–25 nM), and has relatively low intrinsic activity at the TAAR1 of these species (EmaxTooltip maximal efficacy = 24–43% relative to β-phenethylamine).
Although, according to the Alcohol and Tobacco Tax and Trade Bureau (TTB) cider producers can only label a product 'Ice Cider' if it is produced from apples naturally frozen outdoors. Two styles not mentioned in the USACM Cider Style Guide are Rosé and Sparkling Cider. Rosé cider can be produced from apple varieties that have reddish-pink pulp, like Pink Pearl and Amour Rouge. Rosé ciders can also be created through the addition of food-grade red dyes, previously used red grape skins, like Marquette with high anthocyanin concentration, red fruits, rose petals, or hibiscus. Lastly, sparkling ciders can be produced through methods of direct carbonation, addition of carbon dioxide (CO2) or by Méthode Champenoise to re-create the traditional Champagne style.
Individuals, particularly children experiencing abuse, may feel a loss of control over their life, circumstances, and their own bodies. Particularly sexual abuse, but also physical abuse, can make individuals feel that the body is not a safe place and an object over which another has control. Starvation, in the case of anorexia, may also lead to reduction in the body as a sexual object, making starvation a solution. Restriction may also be a means by which the pain an individual is experiencing can be communicated.
The spokesperson warned that as long as Pakistan's attacks inside Afghanistan will continue, Taliban forces will keep on responding. A spokesperson for Taliban-led Afghan Ministry of Defense said that Taliban forces has the ability to block Pakistan's air operations inside Afghanistan. United Nations Assistance Mission in Afghanistan (UNAMA) announced that at least 42 civilians were killed and 104 others injured in Afghanistan in six days of fighting between the Taliban and Pakistan. The figure include casualties caused by indirect fire during cross-border fighting that struck residential areas in provinces of Paktia, Paktika, Nangarhar, Kunar and Khost, as well as airstrikes in Paktika and Nangarhar. UNAMA urged both countries to halt the clashes, to comply with international law, including international humanitarian law, and to protect civilians. Pakistani officials claimed that since the start of hostilities, 464 Afghan Taliban personnel had been killed and more than 665 others had been injured. They added that 188 checkposts had been destroyed, 31 posts captured, 192 tanks, armoured vehicles, and artillery pieces destroyed, and 56 locations across Afghanistan targeted in air strikes. Pakistani officials also said that they had carried out intelligence based operation Bannu district against Pakistani Taliban, injuring multiple militants. In Lakki Marwat district, a Pakistani Taliban commander was killed by Pakistani forces, while in Tank district, a Pakistani police constable was shot dead by militants.
Sources: en.wikipedia.org
No. It is an investigational compound without approved therapeutic indications. It is sold for research purposes only in many jurisdictions.
Sports authorities prohibit it because it is not approved for human use and has potential performance-enhancing effects. It appears on anti-doping lists under non-approved or metabolic modulator categories.
Detection usually uses liquid chromatography-tandem mass spectrometry. The method targets the parent compound or its metabolites in urine or blood.
SR9009 is a synthetic research compound that activates the REV-ERBα and REV-ERBβ nuclear receptors. It is not an approved drug and has no established human therapeutic use. Most published biological data come from cell and rodent studies.