circadian clock comes up often in conversation and rarely with the context attached. Here we lay out the basics in order, then work through the practical considerations.
Updated 2025-12-30. Numbers and descriptions here follow the published literature rather than marketing material.
In rodent studies, SR9009 has been reported to increase mitochondrial content in skeletal muscle and improve exercise endurance under some conditions. These findings led to popular descriptions such as an exercise mimetic, although that term oversimplifies the biology. Effects vary by dose, timing, tissue, and model. The compound's influence on circadian pathways means that time of administration can matter in experiments. Whether similar metabolic changes occur in humans remains largely unexplored in controlled published trials.
Pharmacokinetic data for SR9009 are limited in published literature. Some reports indicate low oral bioavailability and rapid clearance in animals, which complicates interpretation of exposure and effect. Researchers often use injected routes in preclinical work to achieve measurable systemic levels. Analytical studies rely on mass spectrometry to detect the parent compound and its metabolites. Questions about tissue distribution, active metabolites, and long-term consequences remain open. Species differences in metabolism can affect observed half-life and target engagement.
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 and metabolic gene expression. In laboratory experiments, SR9009 binds these receptors and alters transcription of genes involved in lipid handling, glucose metabolism, and mitochondrial function. It is not a naturally occurring compound and has no approved therapeutic use. Research interest stems from its ability to modify energy metabolism in cells and animal models.
SR9009 stability depends on temperature, moisture, light, and solvent. Solid material is generally kept cool and dry, while solutions may require protection from repeated warming and cooling. Degradation can appear as color changes, precipitate, or new chromatographic peaks. Researchers should follow supplier instructions and their own stability data. Long-term storage conditions for human use have not been established because the compound lacks approved clinical formulation.
SR9009 is supplied as a solid research chemical, often in milligram quantities. Laboratories typically weigh it in a controlled environment because fine powders can disperse. Stock solutions are commonly prepared in dimethyl sulfoxide and stored in small aliquots to reduce freeze-thaw cycles. Personal protective equipment and chemical fume hoods are standard when handling unknown or potent compounds. These practices address laboratory safety rather than human use.
Identity and purity of SR9009 samples are usually checked with chromatographic and spectrometric methods. High-performance liquid chromatography can separate the compound from related impurities, while mass spectrometry provides molecular mass confirmation. Nuclear magnetic resonance spectroscopy may be used for structural verification in research settings. No single method proves biological activity, and certificates of analysis should be reviewed alongside raw data. Independent testing is often needed because online products vary widely.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic small-molecule REV-ERB agonist | Not a hormone or natural product |
| Primary targets | REV-ERBα and REV-ERBβ | Nuclear receptors involved in circadian and metabolic regulation |
| Appearance | White to off-white solid | Typical for purified research samples |
| Solubility | Soluble in DMSO and ethanol; low water solubility | Laboratory solubility depends on solvent and purity |
| Common synonyms | SR9009; Stenabolic | Stenabolic is a colloquial name, not a formal chemical name |
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.
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.
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.
SR9009 is a synthetic small molecule developed as a REV-ERB agonist. It binds to REV-ERBα and REV-ERBβ, nuclear receptors that help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, the compound alters lipid and glucose handling and influences skeletal muscle oxidative capacity. Its exact effects in humans remain largely uncharacterized because controlled clinical trials have not been reported. The molecule is frequently described in preclinical literature as a metabolic modulator.
Research interest in SR9009 grew from studies showing improved running endurance in mice after short treatment periods. Those experiments linked the compound to increased mitochondrial content and fatty acid oxidation in muscle, but the findings come from animal models and specific dosing schedules. Independent replication has been limited, and the pathways connecting REV-ERB activation to exercise performance are still being mapped. Whether similar responses occur in humans is an open question.
=== Rest of 2008 === On 1 September 2008, Antonio Cassese wrote in The Guardian that none of Russian justifications used for the invasion of Georgia "holds water" and "the 1992 agreement authorises only monitoring of internal tensions, not massive use of military force." On 9 September 2008, scholar Frederick Kagan stated before the hearing of the 110th United States Congress that Abkhaz and South Ossetian separatists were engaged in provocations against Georgia and Russian peacekeepers were illegally aiding them instead of curbing them. Michael McFaul stated, "The initial skirmishes between Ossetian and Georgian forces that first sparked this conflict in early August 2008 should have been contained." He further stated, "Nonetheless, Georgian military action within its borders can in no way be equated with or cited as an excuse for Russia's invasion and then dismemberment of a sovereign country." He went on to say that Russian actions in Georgia "were not a mere defensive reaction to Georgian military actions in South Ossetia."
Ceftriaxone (a third-generation cephalosporin) use is a risk factor for VRE colonization and infection, and restriction of cephalosporin use has been associated with decreased VRE infection and transmission in hospitals. Lactobacillus rhamnosus GG (LGG), a strain of L. rhamnosus, was used successfully for the first time to treat gastrointestinal carriage of VRE. In the US, linezolid is commonly used to treat VRE. The combination of linezolid and fosfomycin has been reported to show synergistic activity against VRE. Similar findings have been described for other oxazolidinones, suggesting a class effect that also includes newer agents such as contezolid, delpazolid, and sutezolid. The combination of daptomycin and ampicillin is another option to treat VRE infections, especially for bacteremia. For invasive vancomycin-resistant E. faecalis infections, both ampicillin-ceftriaxone and ampicillin-gentamicin combinations have been used successfully, with the latter specifically showing success in treating endocarditis. If the VRE strain is vanB, teicoplanin and dalbavancin are suitable therapeutic options. Another antibiotic often used as off-label salvage therapy in systemic VRE infections is oritavancin, a semisynthetic glycopeptide that has demonstrated synergic activity with fosfomycin. With the emergence of resistance to last-resort antibiotics such as oxazolidinones (e.g., linezolid) and daptomycin, sustained research efforts are required to ensure the continuous development of treatment options.
== Legal status == Difenoxin is a Schedule I drug by itself in the US; the combination with atropine is in the less-restrictive category Schedule IV on account of the adulterant (the practice of making opioids more easily available by including an abuse-deterring adulterating agent is standard practice in the United States). Pure difenoxin, in Schedule I, has a quota of 50 grammes, and an ACSCN of 9168. The combination of difenoxin and atropine, in Schedule IV, has the DEA ACSCN of 9167 and being in Schedule IV is not assigned an aggregate annual manufacturing quota.
== Operations and technology == By 2015, Lineage's facility network was ranked the second-largest in the world by the International Association of Refrigerated Warehouses. With 111 facilities in 21 states, Lineage also ranked as the second largest temperature-controlled warehousing and logistics company in the United States. In September 2020, Lineage raised $1.6 billion in equity for technology and expansion. In March 2021, Lineage raised $1.9 billion in equity for global greenfield developments, facility expansions, M&A and research and development. In July 2021, Lineage partnered with 8VC logistics technology venture capital firm, to further invest in the transportation and logistics technology sector.
In a previous research study, the researchers found that the representation of the "outcast" character with mental illness in a movie tends to get negative evaluations from the children. Regarding this, the study found that it could make the children stick with the significant levels of stigmatization in negatively labeling individuals with mental illness even when they grow up. Other research specifically focused on a particular film, Joker, found that the depiction of individuals with mental illness appears to be negative towards the audience. Regarding this, the researchers demonstrated the concerns that the film Joker could aggravate the self-stigma of individuals with mental illness with an emphasis on negative depictions. Another troubling effect is that stereotypical imagery, coupled with the lack of alternative viewpoints, further dissuades mentally ill people from seeking help or treatment. Due to the generally negative view of mental illnesses, regardless of whether or not it is based on truth, those who experience mental illness often feel dejected, embarrassed, or shameful about their diagnoses. These feelings may lead people with mental illnesses to distance themselves from loved ones and often avoid seeking help or treatment due to fear of rejection.
Sources: en.wikipedia.org
This amounts to less than half of the original cardiomyocytes being replaced during the average lifespan. However, serious doubts have been placed on the validity of this research, including the appropriateness of the samples as representative of normally aging hearts. Further research has been conducted that supports the potential for human cardiac regeneration. Inhibition of p38 MAP kinase was found to induce mitosis in adult mammalian cardiomyocytes, while treatment with FGF1 and p38 MAP kinase inhibitors was found to regenerate the heart, reduce scarring, and improve cardiac function in rats with cardiac injury. One of the most promising sources of heart regeneration is the use of stem cells. It was demonstrated in mice that there is a resident population of stem cells or cardiac progenitors in the adult heart – this population of stem cells was shown to be reprogrammed to differentiate into cardiomyocytes that replaced those lost during a heart tissue death. In humans specifically, a "cardiac mesenchymal feeder layer" was found in the myocardium that renewed the cells with progenitors that differentiated into mature cardiac cells. What these studies show is that the human heart contains stem cells that could potentially be induced into regenerating the heart when needed, rather than just being used to replace expended cells. Loss of the myocardium due to disease often leads to heart failure; therefore, it would be useful to be able to take cells from elsewhere in the heart to replenish those lost.
The germ contains oil that is exposed by grinding, thus whole-grain cornmeal and grits turn rancid quickly at room temperature and should be refrigerated. Whole-grain cornmeal and grits require extended cooking times as seen in the following cooking directions for whole-grain grits: "Place the grits in a pan and cover them with water. Allow the grits to settle a full minute, tilt the pan, and skim off and discard the chaff and hulls with a fine tea strainer. Cook the grits for 50 minutes if the grits were soaked overnight or else 90 minutes if not." The milling of corn removes the aleurone and germ layers, removing much of the (already low) amounts of bioavailable niacin and tryptophan found within. The milling and degerming of corn in the preparation of cornmeal became feasible with the development of the Beall degerminator, which was originally patented in 1901 and was used to separate the grit from the germ in corn processing. Casimir Funk, who helped elucidate the role of thiamin in the etiology of beriberi, was an early investigator of the problem of pellagra. Funk suggested that a change in the method of milling corn was responsible for the outbreak of pellagra, but no attention was paid to his article on this subject.
In 1981, Ceaușescu began an austerity programme designed to enable Romania to liquidate its entire national debt (US$10,000,000,000). To achieve this, many basic goods—including gas, heating and food—were rationed, which reduced the standard of living and increased malnutrition. The infant mortality rate grew to be the highest in Europe. The secret police, the Securitate, had become so omnipresent that it made Romania a police state. Free speech was limited and opinions that did not favor the Romanian Communist Party (PCR) were forbidden. The large numbers of Securitate informers made organised dissent nearly impossible. The regime deliberately played on this sense that everyone was being watched to make it easier to bend the people to the Party's will. Even by Soviet Bloc standards, the Securitate was exceptionally brutal. Ceaușescu created a cult of personality, with weekly shows in stadiums or on streets in different cities dedicated to him, his wife and the Communist Party. There were several megalomaniac projects, such as the construction of the grandiose House of the Republic (today the Palace of the Parliament)—the biggest palace in the world—the adjacent Centrul Civic and a never-completed museum dedicated to Communism and Ceaușescu, today the Casa Radio. These and similar projects drained the country's finances and aggravated the already dire economic situation. Thousands of Bucharest residents were evicted from their homes, which were subsequently demolished to make room for the huge structures.
In humans, glucose is metabolized by glycolysis and the pentose phosphate pathway. Glycolysis is used by all living organisms, with small variations, and all organisms generate energy from the breakdown of monosaccharides. In the further course of the metabolism, it can be completely degraded via oxidative decarboxylation, the citric acid cycle (synonym Krebs cycle) and the respiratory chain to water and carbon dioxide. If there is not enough oxygen available for this, the glucose degradation in animals occurs anaerobic to lactate via lactic acid fermentation and releases much less energy. Muscular lactate enters the liver through the bloodstream in mammals, where gluconeogenesis occurs (Cori cycle). With a high supply of glucose, the metabolite acetyl-CoA from the Krebs cycle can also be used for fatty acid synthesis. Glucose is also used to replenish the body's glycogen stores, which are mainly found in liver and skeletal muscle. These processes are hormonally regulated. In other living organisms, other forms of fermentation can occur. The bacterium Escherichia coli can grow on nutrient media containing glucose as the sole carbon source. In some bacteria and, in modified form, also in archaea, glucose is degraded via the Entner-Doudoroff pathway. With glucose, a mechanism for gene regulation was discovered in E. coli, the catabolite repression (formerly known as glucose effect). Use of glucose as an energy source in cells is by either aerobic respiration, anaerobic respiration, or fermentation.
=== Biosynthesis === The biosynthetic route to TTX is only partially understood. It is long known that the molecule is related to saxitoxin, and as of 2011 it is believed that there are separate routes for aquatic (bacterial) and terrestrial (newt) TTX. In 2020, new intermediates found in newts suggest that the synthesis starts with geranyl guanidine in the amphibian; these intermediates were not found in aquatic TTX-containing animals, supporting the separate-route theory. In 2021, the first genome of a TTX-producing bacterium was produced. This "Bacillus sp. 1839" was identified as Cytobacillus gottheilii using its rRNA sequence. The researcher responsible for this study has not yet identified a coherent pathway but hopes to do so in the future.
Sources: en.wikipedia.org
A nutrient is a substance used by an organism to survive, grow and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi and protists. Nutrients can be incorporated into cells for metabolic purposes or excreted by cells to create non-cellular structures such as hair, scales, feathers, or exoskeletons. Some nutrients can be metabolically converted into smaller molecules in the process of releasing energy such as for carbohydrates, lipids, proteins and fermentation products (ethanol or vinegar) leading to end-products of water and carbon dioxide. All organisms require water. Essential nutrients for animals are the energy sources, some of the amino acids that are combined to create proteins, a subset of fatty acids, vitamins and certain minerals. Plants require more diverse minerals absorbed through roots, plus carbon dioxide and oxygen absorbed through leaves. Fungi live on dead or living organic matter and meet nutrient needs from their host. Different types of organisms have different essential nutrients. Ascorbic acid (vitamin C) is essential to humans and some animal species but most other animals and many plants are able to synthesize it. Nutrients may be organic or inorganic: organic compounds include most compounds containing carbon, while all other chemicals are inorganic. Inorganic nutrients include iron, selenium, and zinc, while organic nutrients include, protein, fats, sugars and vitamins. A classification used primarily to describe nutrient needs of animals divides nutrients into macronutrients and micronutrients.
==== Tryptamine and lysergamide psychedelics ==== Austrian anthropologist and ethnobotanist Blas Pablo Reko, traveling through Central and South America, wrote of the use of teonanacatl by native Mexican people in Oaxaca in 1919. Reko subsequently sent samples of teonanacatl (Psilocybe mexicana) as well as Ipomoea violacea (morning glory) seeds to Swedish anthropologist Henry Wassén in 1937. Reko had obtained the mushroom sample from Austrian engineer Robert Weitlaner who was working in Mexico. Eventually, Wassén forwarded Reko and Weitlaner's mushroom sample to Harvard University, where the mushrooms came to the attention of American ethnobotanist Richard Evans Schultes. However, they had decomposed so badly that they could not be identified. Prior to Wassén obtaining specimens around 1936, the existence of teonanacatl was very controversial and was debated and even denied by some. In 1938, a small group of Westerners, which included Weitlaner's daughter and American anthropologist Jean Basset Johnson, attended a mushroom ceremony. They were the first Westerners known to do so and described the event. Schultes published reviews of teonanacatl being a hallucinogenic mushroom in the late 1930s. Schultes obtained specimens of three of the hallucinogenic mushrooms used in ceremonies, including Psilocybe caerulescens, Panaeolus campanulatus, and Stropharia cubensis, but further investigations of the mushrooms were interrupted by World War II.
On 24 June 2013, while the Essendon Football Club was being investigated by the Australian Sports Anti-Doping Authority (ASADA) over the legality of its supplements program during the 2012 AFL season, Watson admitted on the Fox Footy program On the Couch that he believed he was given the substance AOD-9604 during the 2012 season with the assistance of the club. The World Anti-Doping Agency (WADA) released a statement clarifying that AOD-9604 fell into the "S0. Non-Approved Substances" category in their List of Prohibited Substances and Methods. ASADA also stated that the use of AOD-9604 is prohibited for use by athletes in any circumstances. During the investigation, Watson was among the thirty-four present and former Essendon players issued show cause notices by ASADA and infraction notices by the AFL, alleging the use of the banned peptide Thymosin beta-4 during the 2012 season. On 31 March 2015, the AFL Anti-Doping Tribunal found all thirty-four players not guilty of all charges. In January 2016, following an appeal by WADA against the AFL Tribunal's not-guilty finding, Watson, along with the other thirty-three players, had their not-guilty verdict overturned. All thirty-four players were suspended for two years, backdated to November 2016, causing him to miss the entire 2016 AFL season. As Watson had won the 2012 Brownlow Medal, during the season that the supplements program took place, the AFL Commission reviewed the award.
Some journalists and researchers have used the term narcoculture to describe this blend of subcultural references, while others have criticized the label as sensationalistic, noting that cartel recruitment also relies heavily on coercion, patronage networks, and legal businesses. The concept nonetheless points to how cultural symbols and narratives can help cartels normalize their presence and project power.
Sources: en.wikipedia.org
It is a synthetic research compound that activates REV-ERB nuclear receptors. It is not an approved drug or dietary supplement. Most information comes from cell and animal studies.
It binds REV-ERBα and REV-ERBβ and changes transcription of metabolic genes. This can affect circadian rhythm, lipid use, and mitochondrial function. The full downstream effects are still under study.
No. Some rodent studies show increased endurance, but controlled human trials are lacking. Claims about human performance are not established by published evidence.
Laboratories commonly use liquid chromatography coupled with mass spectrometry to detect SR9009. The method can identify the compound and estimate concentration in a sample. Detection limits depend on the matrix and instrument.