If you have been reading about anti-doping testing 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 2026-04-12. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
SR9009 is a synthetic small molecule developed as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors help regulate circadian rhythms and metabolic gene expression. In cell and animal studies, SR9009 alters transcription of genes involved in lipid metabolism, inflammation, and mitochondrial function. It is not an approved medicine, and its pharmacological profile in humans remains largely uncharacterized. The compound is frequently discussed in the context of circadian biology and metabolic research rather than clinical use.
Preclinical reports have linked SR9009 to improved endurance and altered energy expenditure in rodents. Such findings have prompted interest in whether REV-ERB activation can influence skeletal muscle metabolism. However, the reported effects depend on dose, route, and experimental model, and replication across laboratories is limited. Human trials have not established comparable outcomes, so claims about exercise performance remain speculative. The absence of controlled human data is a central limitation in interpreting these observations.
The mechanism of action involves binding to REV-ERB receptors and recruiting corepressor complexes, which represses target gene transcription. This contrasts with many nuclear receptor agonists that activate transcription. Downstream effects may include changes in autophagy, mitochondrial biogenesis, and lipid handling, but the precise pathways remain an active area of study. Whether these molecular events translate into meaningful physiological effects in humans is unresolved. Most evidence comes from cultured cells and rodent models rather than human participants.
| 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 |
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.
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.
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.
SR9009 is generally described as poorly soluble in water and more soluble in organic solvents such as dimethyl sulfoxide and ethanol. Stock solutions are commonly prepared in an organic solvent before dilution into an aqueous buffer or vehicle. Precipitation can occur if the organic fraction is reduced too quickly or if the final concentration exceeds the compound's solubility limit. Sonication or gentle warming may aid dissolution in some protocols, but excessive heat can promote degradation. Container material and pH can also influence observed solubility.
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.
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.
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.
=== Electrochemical assembly === Highly ordered arrays of quantum dots may also be self-assembled by electrochemical techniques. A template is created by causing an ionic reaction at an electrolyte–metal interface which results in the spontaneous assembly of nanostructures, including quantum dots, onto the metal which is then used as a mask for mesa-etching these nanostructures on a chosen substrate.
== Mechanism == Obstructive sleep apnea The causes of obstructive sleep apnea are complex and individualized, but typical risk factors include narrow pharyngeal anatomy and craniofacial structure. When anatomical risk factors are combined with non-anatomical contributors such as an ineffective pharyngeal dilator muscle function during sleep, unstable control of breathing (high loop gain), and premature awakening to mild airway narrowing, the severity of the OSA rapidly increases as more factors are present. When breathing is paused due to upper airway obstruction, carbon dioxide builds up in the bloodstream. Chemoreceptors in the bloodstream note the high carbon dioxide levels. The brain is signaled to awaken the person, which clears the airway and allows breathing to resume. Breathing normally will restore oxygen levels and the person will fall asleep again. This carbon dioxide build-up may be due to the decrease of output of the brainstem regulating the chest wall or pharyngeal muscles, which causes the pharynx to collapse. As a result, people with sleep apnea experience reduced or no slow-wave sleep and spend less time in REM sleep. Central sleep apnea There are two main mechanism that drive the disease process of CSA, sleep-related hypoventilation and post-hyperventilation hypocapnia. The most common cause of CSA is post-hyperventilation hypocapnia secondary to heart failure. This occurs because of brief failures of the ventilatory control system but normal alveolar ventilation.
During the mid-19th century, one of the most remarkable painters was Ramón Torres Méndez, who produced a series of good quality paintings depicting the people and their customs of different Colombian regions. Also noteworthy in the 19th century were Andrés de Santa María, Pedro José Figueroa, Epifanio Garay, Mercedes Delgado Mallarino, José María Espinosa, Ricardo Acevedo Bernal, between many others. More recently, Colombian artists Pedro Nel Gómez and Santiago Martínez Delgado started the Colombian Murial Movement in the 1940s, featuring the neoclassical features of Art Deco. Since the 1950s, the Colombian art started to have a distinctive point of view, reinventing traditional elements under the concepts of the 20th century. Examples of this are the Greiff portraits by Ignacio Gómez Jaramillo, showing what the Colombian art could do with the new techniques applied to typical Colombian themes. Carlos Correa, with his paradigmatic "Naturaleza muerta en silencio" (silent dead nature), combines geometrical abstraction and cubism. Alejandro Obregón is often considered as the father of modern Colombian painting, and one of the most influential artist in this period, due to his originality, the painting of Colombian landscapes with symbolic and expressionist use of animals, (specially the Andean condor). Fernando Botero, Omar Rayo, Enrique Grau, Édgar Negret, David Manzur, Rodrigo Arenas Betancourt, Oscar Murillo, Doris Salcedo and Oscar Muñoz are some of the Colombian artists featured at the international level.
Sources: en.wikipedia.org
=== 2013 class action lawsuit === In 2013, a proposed class action lawsuit, Jennifer L Saavedra v. Eli Lilly and Company, was brought against Eli Lilly claiming that the Cymbalta label omitted important information about "brain zaps" and other symptoms upon cessation. Eli Lilly moved for dismissal per the "learned intermediary doctrine" as the doctors prescribing the drug were warned of the potential problems and are an intermediary medical judgment between Lilly and patients; in December 2013, Lilly's motion to dismiss was denied. In December 2014, class certification was denied. A second attempt at certification in 2015 also failed.
== Contributions to Science == Alexander von Humboldt’s scientific achievements are notable for their scope, empirical rigor, and transformative impact across the natural sciences. His American expedition (1799–1804) produced a vast array of new data and observations, which he synthesized in a remarkable body of published work. Humboldt’s enduring reputation is grounded in his relentless fieldwork, his innovative methods of data visualization, and above all in his vision of nature as a unified and dynamic system. His contributions to plant geography are evident in his Essai sur la géographie des plantes (1805), which introduced the idea that plant distributions are determined by environmental factors such as climate, elevation, and soil. This groundbreaking work was based on his ascent of equatorial mountains like Chimborazo and Pichincha, where he meticulously recorded changes in vegetation corresponding to altitude and temperature. Humboldt’s iconic “Chimborazo profile” visually mapped plant zones along the mountain’s slopes, integrating botanical, meteorological, and physical data. By demonstrating that the same climatic zones could produce similar vegetation types on different continents, Humboldt laid the foundations for modern biogeography and ecology, moving beyond Linnaean taxonomy to a dynamic understanding of the relationship between organisms and their environment.
== Risk factors == Identified risk factors for plantar fasciitis include excessive running, prolonged standing on hard surfaces, high arches, leg length inequality, and flat feet. The tendency of flat feet to excessively roll inward, or supinate, during walking or running makes them more susceptible. Obesity is seen in 70% of individuals who present with plantar fasciitis and is an independent risk factor. Plantar fasciitis is commonly a result of some biomechanical imbalance that causes increased tension along the fascia. Achilles tendon tightness and inappropriate footwear are significant risk factors.
The company was endorsed by Australian touring car driver Jamie Whincup from late 2009 to 2012. The deal was canceled abruptly for the 2013 season, when his team Triple Eight signed rival Red Bull as sponsor. Monster partnered with James Courtney and Holden Racing Team for the 2016 International V8 Supercars Championship, and is now associated with Tickford Racing as primary sponsor of Cameron Waters Ford Mustang Supercar. Monster Energy has been the main sponsor of Formula Drift champion Vaughn Gittin Jr. since 2010, and NHRA racer Brittany Force since 2015. The brand has sponsored rally drivers such as Ken Block, Liam Doran and Nani Roma. On May 18, 2022, it was announced that Monster Energy would sponsor Andreas Bakkerud and Robin Larsson of Dreyer & Reinbold Racing in Nitro Rallycross. Monster Energy also has a big presence in the desert racing scene. It is the main sponsor for the Baja 1000 and Baja 500, and a variety of teams in different classes, including Trophy Truck drivers Cameron Steele, Alan Ampudia and Kyle LeDuc.
Sources: en.wikipedia.org
=== Sheep meat consumption === According to the OECD-FAO Agricultural Outlook for 2016, the top consumers of sheep meat in 2015 were as follows: EU countries are not individually surveyed in this list. Among EU nations, Greece is the per capita leader in consumption at 12.3 kg, with Cyprus following right after, while the UK's annual per capita lamb consumption is 4.7 kg. Outside of the OECD, the largest per capita consumer overall is Mongolia, with 45.1 kg.
The pressure a liquid exerts against the sides and bottom of a container depends on the density and the depth of the liquid. If atmospheric pressure is neglected, liquid pressure against the bottom is twice as great at twice the depth; at three times the depth, the liquid pressure is threefold; etc. Or, if the liquid is two or three times as dense, the liquid pressure is correspondingly two or three times as great for any given depth. Liquids are practically incompressible – that is, their volume can hardly be changed by pressure (water volume decreases by only 50 millionths of its original volume for each atmospheric increase in pressure). Thus, except for small changes produced by temperature, the density of a particular liquid is practically the same at all depths. Atmospheric pressure pressing on the surface of a liquid must be taken into account when trying to discover the total pressure acting on a liquid. The total pressure of a liquid, then, is ρgh plus the pressure of the atmosphere. When this distinction is important, the term total pressure is used. Otherwise, discussions of liquid pressure refer to pressure without regard to the normally ever-present atmospheric pressure. The pressure does not depend on the amount of liquid present. Volume is not the important factor – depth is. The average water pressure acting against a dam depends on the average depth of the water and not on the volume of water held back. For example, a wide but shallow lake with a depth of 3 m (10 ft) exerts only half the average pressure that a small 6 m (20 ft) deep pond does.
=== Betaines and similar compounds === The compound trimethylglycine, named as "betaine", contain the same structural motif, a quaternary nitrogen atom with a carboxylate group attached to it via a –CH2– link. All compounds whose structure includes this motif are known as betaines. Betaines do not isomerize because the chemical groups attached to the nitrogen atom are not labile. These compounds may be classed as permanent zwitterions, as isomerisation to a molecule with no electrical charges does not occur, or is very slow. Other examples of permanent zwitterions include phosphatidylcholines, which also contain a quaternary nitrogen atom, but with a negatively-charged phosphate group in place of a carboxylate group; sulfobetaines, which contain a quaternary nitrogen atom and a negatively charged sulfonate group; and pulmonary surfactants such as dipalmitoylphosphatidylcholine. Lauramidopropyl betaine is the major component of cocamidopropyl betaine.
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.
It is a synthetic compound that acts as an agonist at REV-ERBα and REV-ERBβ. It is used mainly as a research chemical to study circadian and metabolic pathways. It is not approved for human therapeutic use.