The short version of WADA fits in a sentence. The long version — which is the one that helps — is below.
Reviewed 2026-05-25. Anything still debated is marked as such rather than presented as settled.
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.
Regulatory treatment of SR9009 varies by country and region. It is not approved as a pharmaceutical, and several jurisdictions restrict its sale for human consumption. Some authorities classify it as a research chemical, a prescription-only substance, or a prohibited performance-enhancing agent in sport. Purchasers may encounter certificates of analysis, but these documents do not guarantee identity, purity, or legality. In research settings, institutional safety reviews and controlled procurement help ensure that materials are handled under appropriate oversight. The absence of harmonized rules means that legal status can change and requires verification.
Analytical identification of SR9009 typically relies on liquid chromatography coupled with tandem mass spectrometry. In biological samples, researchers first separate the compound from matrix components using protein precipitation, liquid-liquid extraction, or solid-phase extraction. High-performance liquid chromatography with ultraviolet detection and nuclear magnetic resonance spectroscopy can support structural confirmation of reference materials. Because SR9009 is a small, relatively lipophilic molecule, reverse-phase columns and acidic mobile phases are common. Laboratories often include isotope-labeled internal standards to improve quantification and to correct for ion suppression.
| 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 |
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.
SR9009 is often grouped with compounds studied for circadian and metabolic regulation rather than with classical anabolic steroids. Its interactions with nuclear receptors differ from those of androgen receptor ligands, and its proposed mechanisms involve transcriptional control rather than direct hormone signaling. Some sources classify it as a metabolic modulator because of observed effects on energy utilization. The distinction matters for regulation and for interpreting research results across different compound classes.
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.
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.
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.
==== Disbandment ==== Though it was not until October 1999 that the split was made official, on 12 September 1998, William had a falling out in the tour bus with Lurie, the guitarist, before they were to play a sold out performance at the famous Los Angeles House of Blues. Jim appeared onstage apparently drunk and barely able to stand or sing. William walked offstage about 15 minutes into their set, and the show ended. The audience was later refunded the price of their tickets. The band finished up their U.S. and Japanese dates without William, but from that point, it was clear that the band was at its end. Jim Reid said in 2006 of the tension between himself and William: "After each tour we wanted to kill each other, and after the final tour we tried". On the final night of the tour in Providence, Rhode Island, the band's promoter ran off with the money and the band reportedly got in a fight with the cast of the show Riverdance.
English is the official language of Belize, a legacy of its former status as a British colony. Belize is the only country in Central America with English as the official language. English is the primary language of public education, government, and most media outlets. Although English is widely used, Belizean Creole is spoken in several situations, whether informal, formal, social, or interethnic dialogue, even in meetings of the House of Representatives. When a creole language exists alongside its lexifier language, as is the case in Belize, a continuum forms between the creole and the lexifier language. Approximately 52.9% of Belizeans self-identify as Mestizo or Hispanic. When Belize was a British colony, Spanish was banned in schools, but since then it has become widely spoken. "Kitchen Spanish" is an intermediate form of Spanish mixed with Belize Creole, spoken in the northern districts. Some good examples are Corozal and San Pedro. Over half the population is multilingual, owing to Belize's status as a small, multiethnic state, surrounded by Spanish-speaking nations. Belize is also home to three Mayan languages: Q'eqchi', Mopan (an endangered language), and Yucatec Maya. Approximately 7,481 people speak the Arawakan-based Garifuna language, and in the mid-1990s about 6,900 Mennonites in Belize spoke Plautdietsch while a minority of Mennonites spoke Pennsylvania Dutch.
Spread of cancer to the bone or spinal cord can lead to back pain. Bone is one of the most common sites of metastatic lesions. Patients typically have a history of malignancy. Common types of cancer that present with back pain include multiple myeloma, lymphoma, leukemia, spinal cord tumors, primary vertebral tumors and prostate cancer. Back pain is present in 29% of patients with systemic cancer. Unlike other causes of back pain that commonly affect the lumbar spine, the thoracic spine is most commonly affected. The pain can be associated with systemic symptoms such as weight loss, chills, fever, nausea and vomiting. Unlike other causes of back pain, neoplasm-associated back pain is constant, dull, poorly localized and worsens with rest. Metastasis to the bone also increases the risk of spinal-cord compression or vertebral fractures that require emergency surgical treatment.
=== Single-particle measurements === Generally speaking single-particle measurement instruments desorb particles one at a time using a pulsed laser. The process is called laser desorption/ionization (LDI) and is the primary ionization method used for single-particle measurements. The main advantage of using LDI over thermal desorption, is the ability to analyze both non-refractory and refractory (e.g., mineral dust, soot) components of atmospheric aerosols. Laser vaporization allows precise laser firing when individual particles fly through the vaporization zone, and the systems are thus dubbed single particle mass spectrometers (SPMS). Several versions of SPMS have been reported, including the aerosol time-of-flight mass spectrometer (AToFMS), the laser mass analyzer for particles in the airborne state (LAMPAS), particle analysis by laser mass spectrometer (PALMS), the rapid single-particle mass spectrometer (RSMS), the bioaerosol mass spectrometer (BAMS) b194 Steele et al., 2003), the nanoaerosol mass spectrometer (NAMS), the single-particle laser ablation time-of-flight mass spectrometer (SPLAT), the single-particle aerosol mass spectrometer (SPAMS), and laser ablation aerosol particle time-of-flight mass spectrometer (LAAP-ToF-MS). Among the most commons of these instruments is the aerosol time-of-flight mass spectrometer (AToFMS).
=== Pharmacokinetics === Similarly to the case of testosterone, epitiostanol shows poor bioavailability and weak therapeutic efficacy when taken orally due to extensive first-pass metabolism. As such, it must instead be administered via intramuscular injection.
Sources: en.wikipedia.org
However, up to 5% of individuals with CAIS do not have an AR mutation. The receptor in question is encoded by the AR gene located on the X chromosome at Xq11–12. At least 15 different mutations were known in 2003, and they are all recessive, which makes the disease follow X-linked recessive inheritance. Immature sperm cells in the testes do not mature past an early stage, as sensitivity to androgens is required in order for spermatogenesis to complete. Germ cell malignancy risk, once thought to be relatively high, is now thought to be approximately 2%. Wolffian structures (the epididymides, vasa deferentia, and seminal vesicles) are typically absent, but will develop at least partially in approximately 30% of cases, depending on which mutation is causing the CAIS. The prostate, like the external male genitalia, cannot masculinize in the absence of androgen receptor function, and thus remains in the female form. The Müllerian system typically regresses the same way it does in unaffected male fetuses due to anti-Müllerian hormone originating from the Sertoli cells of the testes. Thus, people with CAIS, despite having a vagina due to androgen insensitivity, are born without fallopian tubes, a cervix, or a uterus, and the vagina ends "blindly" in a pouch. Müllerian regression does not fully complete in some cases of CAIS, resulting in Müllerian "remnants". Although rare, a few cases of people diagnosed with CAIS and having Müllerian structures have been reported. In one exceptional case, a 22-year-old with CAIS was found to have a cervix, uterus, and fallopian tubes.
Though these events served as inspiration for the field, the actual breakthrough in practical approaches to synthesize artificial molecular machines (AMMs) took place in 1991 with the invention of a "molecular shuttle" by Sir Fraser Stoddart. Building upon the assembly of mechanically linked molecules such as catenanes and rotaxanes as developed by Jean-Pierre Sauvage in the early 1980s, this shuttle features a rotaxane with a ring that can move across an "axle" between two ends or possible binding sites (hydroquinone units). This design realized the well-defined motion of a molecular unit across the length of the molecule for the first time. In 1994, an improved design allowed control over the motion of the ring by pH variation or electrochemical methods, making it the first example of an AMM. Here the two binding sites are a benzidine and a biphenol unit; the cationic ring typically prefers staying over the benzidine ring, but moves over to the biphenol group when the benzidine gets protonated at low pH or if it gets electrochemically oxidized. In 1998, a study could capture the rotary motion of a decacyclene molecule on a copper-base metallic surface using a scanning tunneling microscope. Over the following decade, a broad variety of AMMs responding to various stimuli were invented for different applications. In 2016, the Nobel Prize in Chemistry was awarded to Sauvage, Stoddart, and Bernard L. Feringa for the design and synthesis of molecular machines.
Five members of Just Stop Oil who organised protests that brought the M25 to a standstill over four days are sentenced to prison terms at Southwark Crown Court. Public disorder breaks out in the Harehills area of Leeds, resulting in a bus being set on fire and damage to a police car. 19 July Global IT outages: A major, worldwide IT outage caused by a faulty CrowdStrike update results in severe disruption to many sectors, including banking, healthcare, retail, telecommunications, and travel. The hottest day of the year so far is recorded, with St James's Park in London reaching 31.9 °C, exceeding the previous high of 30.5 °C in Surrey on 26 June. Ukraine President Volodymyr Zelensky visits Downing Street and addresses the cabinet, becoming the first foreign leader to address a British cabinet since 1997, and urges Keir Starmer to "show your leadership" by helping to remove restrictions on the use of weapons supplied to Ukraine. Office for National Statistics data shows that UK national debt is at its highest since 1962, with government debt worth 99.5% of the value of the economy in June, exceeding levels reached during the COVID-19 pandemic. Unexpected mid-contract price rises from companies such as mobile phone, broadband and pay-TV providers are banned, with new rules coming in from 17 January 2025. 20 July Global IT outages: NHS England says that digital systems for GPs surgeries and pharmacies have been mostly restored, but warns there could be some disruption for the next few days as surgeries work through a backlog of appointments.
Nandrolone, also known as 19-nortestosterone (19-NT) or as estrenolone, as well as estra-4-en-17β-ol-3-one or 19-norandrost-4-en-17β-ol-3-one, is a naturally occurring estrane (19-norandrostane) steroid and a derivative of testosterone (androst-4-en-17β-ol-3-one). It is specifically the C19 demethylated (nor) analogue of testosterone. Nandrolone is an endogenous intermediate in the production of estradiol from testosterone via aromatase in mammals including humans and is present in the body naturally in trace amounts. It can be detected during pregnancy in women. Nandrolone esters have an ester such as decanoate or phenylpropionate attached at the C17β position.
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.
The most common approach is liquid chromatography-tandem mass spectrometry, often after extraction from blood, urine, or tissue. Ultraviolet detection and nuclear magnetic resonance spectroscopy are used mainly for reference material characterization. Isotope-labeled internal standards improve accuracy.