This is a working overview of circadian rhythm, written for readers who want more than a one-paragraph summary but less than a textbook.
Reviewed 2025-08-30. Anything still debated is marked as such rather than presented as settled.
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.
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.
Research interest in SR9009 grew from studies of circadian biology and metabolic disease. Preclinical reports describe effects on exercise capacity, muscle metabolism, and blood lipid levels in rodents, but these findings come from controlled laboratory settings. The compound has low oral bioavailability in animals, which limits systemic exposure after swallowing. Investigators often use injected routes in experiments to achieve measurable plasma concentrations. Human clinical data are sparse, no approved therapeutic product exists, and whether animal effects translate to humans remains an open question.
Regulatory and sporting contexts treat SR9009 as a prohibited substance in many elite competitions. Its presence on banned lists reflects concerns about performance enhancement and unknown long-term safety. Analytical chemists have developed methods to detect the parent compound and its metabolites in urine and blood. Literature discussions distinguish between in vitro potency, animal pharmacology, and anecdotal human reports. The latter are difficult to verify because products sold online may lack purity or contain different compounds.
SR9009 is a synthetic small molecule studied as an agonist of the nuclear receptors REV-ERBα and REV-ERBβ. These receptors help regulate circadian rhythms, lipid metabolism, and inflammatory gene expression. In cell and animal experiments, SR9009 alters transcription of clock-controlled genes and metabolic pathways. The compound is not a hormone and does not resemble classical steroid structures. Its activity depends on binding to the ligand-binding domain of REV-ERB, where it can modify corepressor recruitment.
| Property | Value | Notes |
|---|---|---|
| Appearance | White to off-white solid | Visual inspection is not sufficient for identity. |
| Solubility | Soluble in DMSO and ethanol | Low solubility in water. |
| Typical storage | -20 °C, desiccated, dark | Protect from repeated temperature changes. |
| Common analytical method | LC-MS or HPLC-UV | Reference standard required for comparison. |
| Common synonyms | SR9009; Stenabolic; REV-ERB agonist | Vendor naming may vary. |
SR9009 is a synthetic small molecule that acts on the nuclear receptors REV-ERBα and REV-ERBβ. These receptors are part of the circadian clock machinery and normally repress transcription of certain target genes. In laboratory research, SR9009 is used as a chemical tool to study how REV-ERB activity influences metabolism, inflammation, and daily biological rhythms. The compound is not an approved medicine, and its effects in humans remain largely uncharacterized. It is often described as an investigational agent rather than a therapeutic product.
REV-ERB proteins typically suppress gene expression by recruiting corepressor complexes to DNA response elements. SR9009 binds these receptors and strengthens that repressive action in cell-based assays. Studies in rodents have reported changes in lipid handling, mitochondrial function, and exercise capacity after treatment. Such findings are often cited as evidence for metabolic effects, but species differences and limited pharmacokinetic data make direct translation to humans uncertain. Researchers continue to examine which effects are robust and which depend on specific experimental conditions.
SR9009 is frequently discussed alongside other REV-ERB ligands, including synthetic agonists and natural heme-related molecules. Its selectivity for REV-ERB over related nuclear receptors has been measured in binding and reporter assays, though off-target activity at higher concentrations is possible. The compound is prohibited in sport by the World Anti-Doping Agency, and it is not approved for any medical use in major jurisdictions. Products sold online may be labeled as research chemicals, and their identity and purity are not guaranteed by regulatory review.
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.
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.
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.
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.
SR9009 is frequently discussed in fitness and research-chemical contexts, yet it has no approved medical indication. Regulatory agencies have not authorized it for human use, and it is not a standard prescription drug. Some sports organizations list it as a prohibited substance because of its potential performance-enhancing properties. Published human data are sparse, so claims about its effects in people often rely on animal models or anecdotal reports. Quality and identity of online materials can vary widely.
SR9009 is a synthetic small molecule studied as a REV-ERB agonist. REV-ERBα and REV-ERBβ are nuclear receptors that help regulate circadian rhythms and metabolic gene expression. The compound was identified in academic screening efforts to find synthetic ligands for these receptors. In cell and animal studies, SR9009 alters transcription of genes involved in lipid and glucose metabolism, and it can shift circadian behavior. It is not an approved therapeutic agent.
The Spartanburg Pellagra Hospital in Spartanburg, South Carolina, was the first facility in the United States dedicated to discovering the cause of pellagra. It was established in 1914 with a special Congressional appropriation to the U.S. Public Health Service and set up primarily for research. In 1915, Dr. Joseph Goldberger, assigned to study pellagra by the surgeon general of the United States, showed it was linked to diet by observing the outbreaks of pellagra in orphanages and mental hospitals. Goldberger noted that children between the ages of 6 and 12 (but not older or younger children at the orphanages) and patients at the mental hospitals (but not doctors or nurses) were the ones who seemed most susceptible to pellagra. Goldberger theorized that a lack of meat, milk, eggs, and legumes made those particular populations susceptible to pellagra. By modifying the diet served in these institutions with "a marked increase in the fresh animal and the leguminous protein foods," Goldberger was able to show that pellagra could be prevented. By 1926, Goldberger established that a diet that included these foods, or a small amount of brewer's yeast, prevented pellagra. Goldberger experimented on 11 prisoners (one was dismissed because of prostatitis). Before the experiment, the prisoners were eating the prison fare fed to all inmates at Rankin Prison Farm in Mississippi. Goldberger started feeding them a restricted diet of grits, syrup, mush, biscuits, cabbage, sweet potatoes, rice, collards, and coffee with sugar (no milk).
=== New Jersey === Because streptomycin was isolated from a microbe discovered on New Jersey soil, and because of its activity against tuberculosis and Gram negative organisms, and in recognition of both the microbe and the antibiotic in the history of New Jersey, S. griseus was nominated as the Official New Jersey state microbe. The draft legislation was submitted by Senator Sam Thompson (R-12) in May 2017 as bill S3190 and Assemblywoman Annette Quijano (D-20) in June 2017 as bill A31900. The bill was passed on 2018-01-08 The bill designates Streptomyces griseus as New Jersey State Microbe (New Jersey Senate Bill 3190 (2017). Governor Phil Murphy signed the bill making it official in 2019.
Astrochemistry – study of the abundance and reactions of chemical elements and molecules in the universe, and their interaction with radiation. Cosmochemistry – study of the chemical composition of matter in the universe and the processes that led to those compositions. Computational chemistry – is a branch of chemistry that uses computer simulations for solving chemical problems. Environmental chemistry – study of chemical and biochemical phenomena that occur diverse aspects of the environment such the air, soil, and water. It also studies the effects of human activity on the environment. Green chemistry is a philosophy of chemical research and engineering that encourages the design of products and processes that minimize the use and generation of hazardous substances. Supramolecular chemistry – refers to the domain of chemistry beyond that of molecules and focuses on the chemical systems made up of a discrete number of assembled molecular subunits or components. Theoretical chemistry – study of chemistry via fundamental theoretical reasoning (usually within mathematics or physics). In particular the application of quantum mechanics to chemistry is called quantum chemistry. Since the end of the Second World War, the development of computers has allowed a systematic development of computational chemistry, which is the art of developing and applying computer programs for solving chemical problems. Theoretical chemistry has large overlap with (theoretical and experimental) condensed matter physics and molecular physics.
18 October – The body of former first minister Alex Salmond is flown from North Macedonia to Scotland in a private jet paid for by businessman Tom Hunter. Former Daily Record editor Murray Foote announces he is standing down as chief executive of the SNP after 14 months in the post. 19 October – The SNP appoints Carol Beattie, a former chief executive of Stirling Council, as interim chief executive following the resignation of Murray Foote. 20 October – An amber weather alert is in place for western Scotland and the north and west of Northern Ireland as Storm Ashley arrives in the UK; yellow alerts are issued for other parts of Scotland, Northern Ireland and the Welsh coast. 21 October – Non-teaching staff at primary schools in John Swinney's Perth and Kinross constituency go on strike over pay and conditions, threatening a walkout that could last two weeks. 23 October – Duncan Ferguson is dismissed as manager of Inverness Caledonian Thistle after the club goes into administration. Jack Crawley is sentenced to life imprisonment with a minimum of 37 years for the October 2023 murder of army veteran Paul Taylor with a hammer in. 25 October – Dylan Brister and Cameron Allan are sentenced to minimum prison terms of 23 and 19 years respectively for the drugging, rape and murder of Calum Simpson, which occurred in November 2021. 29 October – The funeral of Alex Salmond is held at the parish church in Strichen, Aberdeenshire.
Sources: en.wikipedia.org
== Structure == GRF (1-29), also known as sermorelin (Tyr-Ala-Asp-Ala-Ile-Phe-Thr-Asn-Ser-Tyr-Arg-Lys-Val-Leu-Gly-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met-Ser-Arg-NH2), the biologically-active portion of the 44 amino acid GHRH. Half-life "less than 10 minutes", perhaps as low as 5 minutes. Mod GRF (1-29) replacement of the 2nd, 8th, 15th, and 27th amino acids of GRF (1-29) yields modified GRF(1-29) (Tyr-D-Ala-Asp-Ala-Ile-Phe-Thr-Gln-Ser-Tyr-Arg-Lys-Val-Leu-Ala-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu-Ser-Arg-NH2). Half-life at least 30 minutes.
heredity Also inheritance. The storage, transfer, and expression of molecular information in biological organisms, as manifested by the passing on of phenotypic traits from parents to their offspring, either through sexual or asexual reproduction. Offspring cells or organisms are said to inherit the genetic information of their parents.
=== Nixon's key decision maker === On 17 February 1969, Nixon then told the Soviet ambassador Anatoly Dobrynin that all matters of substance were to go through Kissinger rather than the Secretary of State William Rogers. Shortly afterwards, Kissinger met with Dobrynin to tell him that Nixon would not accept any settlement that looked like a defeat nor did he want any change in the regime in Saigon, though "evolution" of the Saigon regime was acceptable. Dobrynin, who served in Washington for many years, had a favorable impression of Kissinger, who was not dogmatic and rigid like his predecessor W.W. Rostow nor dull and unimaginative like Dean Rusk. Kissinger then set about undermining Henry Cabot Lodge Jr., the head of the American peace delegation in Paris, as he asked Dobrynin to set up a secret meeting in Paris between him and Le Duc Tho, the most important member of the North Vietnamese delegation in Paris. On 22 February 1969, the Viet Cong launched an offensive in South Vietnam, which Kissinger called "an act of extraordinary cynicism". Nixon, on a trip to Europe, took the offensive as a personal insult and wanted to bomb Cambodia in retaliation. Kissinger persuaded Nixon to wait until his European trip was over. As part of the "linkage" concept, Kissinger in March 1969 sent Cyrus Vance to Moscow with the message that if the Soviet Union pressured North Vietnam into a diplomatic settlement favorable to the United States, the reward would be concessions on the talks on limiting the nuclear arms race.
Sources: en.wikipedia.org
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.
The solid is usually kept desiccated at -20 °C or lower and protected from light. Stock solutions are aliquoted to limit freeze–thaw cycles. Aqueous solutions are not generally recommended for long-term storage.
Laws differ by country and by intended use. It is not an approved medicine, and many vendors sell it as a research chemical. Purchasers are responsible for confirming local restrictions.
SR9009 is a synthetic small molecule studied as an agonist of the REV-ERB nuclear receptors. It is not an approved medicine, and its effects in humans are not well characterized.