research chemical 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.
Last reviewed on 2026-08-01. Where a claim depends on a specific study, the study is described rather than over-claimed.
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.
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.
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.
| 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 |
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.
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.
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.
=== Sham acupuncture and research === It is difficult but not impossible to design rigorous research trials for acupuncture. Due to acupuncture's invasive nature, one of the major challenges in efficacy research is in the design of an appropriate placebo control group. For efficacy studies to determine whether acupuncture has specific effects, "sham" forms of acupuncture where the patient, practitioner, and analyst are blinded seem the most acceptable approach. Sham acupuncture uses non-penetrating needles or needling at non-acupuncture points, e.g. inserting needles on meridians not related to the specific condition being studied, or in places not associated with meridians. The under-performance of acupuncture in such trials may indicate that therapeutic effects are due entirely to non-specific effects, or that the sham treatments are not inert, or that systematic protocols yield less than optimal treatment. A 2014 review in Nature Reviews Cancer found that "contrary to the claimed mechanism of redirecting the flow of qi through meridians, researchers usually find that it generally does not matter where the needles are inserted, how often (that is, no dose-response effect is observed), or even if needles are actually inserted.
== Adverse effects == The US prescription label includes warnings and precautions for central nervous system adverse reactions, QTc interval prolongation, interstitial lung disease/pneumonitis, skeletal fractures, myalgia with creatine phosphokinase elevation, pancreatic toxicity, and embryo-fetal toxicity.
=== Genetics === In MCTD, major histocompatibility complex (MHC) and non-MHC genes have been linked to disease vulnerability. HLA-DR4 in the MHC is linked to both anti-RNP antibody responses and MCTD. The HLA class II phenotype/genotype most closely connected with scleroderma, HLA-DR5, and its subgroups, has been demonstrated to have a negative connection with MCTD. Another genetic feature of MCTD is the presence of anti-RNP antibodies. However, these antibodies are not present in all patients. Genome-wide association studies have revealed that there are parts of a patient’s genetic material that cause production of these anti-RNP antibodies. The mechanism is not yet thoroughly defined.
Cannabinoids () are several structural classes of compounds found primarily in the Cannabis plant or as synthetic compounds. Cannabinoids can be classified into two categories: major cannabinoids, which are present in high amounts in the Cannabis plant, and minor cannabinoids, which are present in smaller amounts in the Cannabis plant. The most notable and the most abundant major cannabinoid is the phytocannabinoid tetrahydrocannabinol (THC) (delta-9-THC). It is a primary psychoactive compound in Cannabis, capable of inducing the feeling of extreme euphoria and loss of memory. Cannabidiol (CBD) is a major constituent of temperate cannabis plants and a minor constituent in tropical varieties. Unlike THC, CBD is non-psychoactive and helps with anxiety and psychosis symptoms. Minor cannabinoids, such as cannabinol (CBN) and cannabichromene (CBC), have not been shown to induce any intoxicating or psychotropic effects. At least 113 distinct phytocannabinoids have been isolated from cannabis, although only four (THCA, CBDA, CBCA, and their common precursor CBGA) have a confirmed biogenetic origin. Phytocannabinoids are also found in other plants, such as rhododendron, licorice, and liverwort. Phytocannabinoids are multi-ring phenolic compounds structurally related to THC, while endocannabinoids are fatty acid derivatives. Nonclassical synthetic cannabinoids (cannabimimetics) include aminoalkylindoles, 1,5-diarylpyrazoles, quinolines, and arylsulfonamides, as well as eicosanoids related to endocannabinoids.
While many languages and dialects are spoken in the United States, English is by far the most commonly spoken and written. English was designated the official language of the United States by Executive Order 14224 in March 2025. However, the U.S. has never had a statutory official language, as Congress has never passed a law to designate English as official for all three federal branches. Some laws, such as U.S. naturalization requirements, nonetheless standardize English. Twenty-eight states and the United States Virgin Islands have laws that designate English as the sole official language; 19 states and the District of Columbia have no official language. Three states and four U.S. territories have recognized local or indigenous languages in addition to English: Hawaii (Hawaiian), Alaska (twenty Native languages), South Dakota (Sioux), American Samoa (Samoan), Puerto Rico (Spanish), Guam (Chamorro), and the Northern Mariana Islands (Carolinian and Chamorro). In total, 169 Native American languages are spoken in the United States. In Puerto Rico, Spanish is more widely spoken than English. According to the American Community Survey (2020), some 245.4 million people in the U.S. age five and older spoke only English at home. About 41.2 million spoke Spanish at home, making it the second most commonly used language. Other languages spoken at home by one million people or more include Chinese (3.40 million), Tagalog (1.71 million), Vietnamese (1.52 million), Arabic (1.39 million), French (1.18 million), Korean (1.07 million), and Russian (1.04 million).
Sources: en.wikipedia.org
== External links == American Society for Clinical Pathology website ASCP’s Support of the CDC OneLab Initiative "American Society Of Clinical Pathologists". Internal Revenue Service filings. ProPublica Nonprofit Explorer.
=== Priming and deblocking === To become functional, the 4'-phospho-pantetheine sidechain of acyl-CoA molecules has to be attached to the PCP-domain by 4'PP transferases (Priming) and the S-attached acyl group has to be removed by specialized associated thioesterases (TE-II) (Deblocking).
=== General observations === There is limited safety information available on the effects of kava consumption, but in general, moderate consumption appears unlikely to be harmful, while there is evidence of harm from heavy use.
== Applications == ECM biomaterials are used to promote healing in a number of tissues, especially the skin and tendons. Surgimend, a collagen matrix derived from fetal bovine dermis, can trigger the healing of tendons (which do not heal spontaneously) in the ankle. This intervention can shorten healing time by almost half and allows the patient to return to full activity much sooner. Open wounds, like tendons, do not spontaneously heal and can persist for long stretches of time. When ECM biomaterials are added in multiple layers to the ulcer, the wound begins to close quickly and generates host tissue. Although preliminary studies seem promising, little information is available on the success of and direct comparisons between different ECM biomaterial devices in human trials. Alloderm, an acellular dermis derived from the skin of donated cadavers, is used in reconstructive and dental surgeries. In gingival grafts, the acellular dermis is an alternative to tissue cut from the palate of the patient's mouth. It has also been used for abdominal hernia repair, and to rebuild resected turbinates in the treatment of empty nose syndrome. Alloderm and other acellular dermal matrices are used routinely in implant based breast reconstruction after mastectomy for improved soft tissue coverage and thus decrease the risk of visible rippling, capsular contraction, implant malposition, bottoming out and implant exposure.
Sources: en.wikipedia.org
In modern everyday life there are many observations that can be successfully explained by application of Bernoulli's principle, even though no real fluid is entirely inviscid, and a small viscosity often has a large effect on the flow.
==== Dairy consumption ==== It has been suggested that consumption of IGF1 in dairy products could increase cancer risk, particularly prostate cancer. However, significant levels of intact IGF1 from oral consumption are not absorbed as they are digested by gastric enzymes. IGF1 present in food is not expected to be active within the body in the way that IGF1 is produced by the body itself. The Food and Drug Administration has stated that IGF-I concentrations in milk are not significant when evaluated against concentrations of IGF-I endogenously produced in humans. A 2018 review by the Committee on Carcinogenicity of Chemicals in Food, Consumer Products and the Environment (COC) concluded that there is "insufficient evidence to draw any firm conclusions as to whether exposure to dietary IGF1 is associated with an increased incidence of cancer in consumers". Certain dairy processes such as fermentation are known to significantly decrease IGF1 concentrations. The British Dietetic Association has described the idea that milk promotes hormone related cancerous tumor growth as a myth, stating "no link between dairy containing diets and risk of cancer or promoting cancer growth as a result of hormones".
For infant circumcision, devices such as the Gomco clamp, Plastibell and Mogen clamp are commonly used in the USA. These follow the same basic procedure. First, the amount of foreskin to be removed is estimated. The practitioner opens the foreskin via the preputial orifice to reveal the glans underneath and ensures it is normal before bluntly separating the inner lining of the foreskin (preputial epithelium) from its attachment to the glans. The practitioner then places the circumcision device (this sometimes requires a dorsal slit), which remains until blood flow has stopped. Finally, the foreskin is amputated. For older babies and adults, circumcision is often performed surgically without specialized instruments, and alternatives such as Unicirc, Shang ring or stapler circumcision are available.Depending on the specific surgical technique or anatomical requirements, the frenulum—an elastic band of tissue on the underside of the penis—may be either preserved or excised during the surgery. If this tissue is removed concurrently, the adjunctive procedure is known as a penile frenulectomy.
=== Local florist === Local florist websites offer arrangements and bouquets for direct delivery in the geographic area physically serviced by their companies' own vans and personnel. This service is also known as "hand delivered" and has the advantage of presenting shoppers with the precise items available for delivery on a same-day basis. Local delivery charges are generally displayed as a separate fee from the price of each product.
A sperm bank will aim to provide donor sperm that is safe by screening donors and their semen. A sperm donor must generally meet specific requirements regarding age and medical history. Requirements for sperm donors are generally strictly enforced; in a study of 24,040 potential sperm donors, only 5,620 (23.38%) were eligible to donate their sperm. Sperm banks typically screen potential donors for a range of diseases and disorders, including genetic diseases, chromosomal abnormalities, and sexually transmitted infections that may be transmitted through sperm. Donors are generally subject to tests for infectious diseases such as human immunoviruses HIV (HIV-1 and HIV-2), human T-cell lymphotropic viruses (HTLV-1 and HTLV-2), syphilis, chlamydia, gonorrhea, hepatitis B virus, hepatitis C virus, cytomegalovirus (CMV), Trypanosoma cruzi and malaria as well as hereditary diseases such as cystic fibrosis, sickle cell anemia, familial Mediterranean fever, Gaucher's disease, thalassaemia, Tay–Sachs disease, Canavan's disease, familial dysautonomia, congenital adrenal hyperplasia, carnitine transporter deficiency. Some sperm banks may also use karyotyping to ensure donors are 46XY. Some sperm banks disallow sexually active gay men from donating sperm due to the population's increased risk of HIV and hepatitis B. The screening procedure generally also includes a quarantine period, in which the samples are frozen and stored for at least six months after which the donor will be re-tested for the STIs.
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.
Legality depends on the country and the intended use. In many places it is not approved as a medicine and may be sold only as a research chemical. Importation or possession can be restricted, and sports organizations prohibit it.