The short version of circadian rhythm fits in a sentence. The long version — which is the one that helps — is below.
This page was last updated on 2025-09-03 and is reviewed periodically as new material appears.
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.
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.
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.
| Property | Value | Notes |
|---|---|---|
| Chemical class | Synthetic REV-ERB agonist | Small molecule; not a steroid or peptide. |
| Primary targets | NR1D1 and NR1D2 | Also known as REV-ERBα and REV-ERBβ. |
| Studied routes | Intraperitoneal in rodents | Oral bioavailability in humans is not established. |
| Human approval | No approved therapeutic indication | No recognized clinical use. |
| Key uncertainty | Human physiological effects | Preclinical findings may not translate. |
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.
== Combination with vampire facials == Platelet-rich plasma (PRP) can be combined with collagen induction therapy treatment in a form of dermatologic autologous blood therapy. PRP is derived from the patient's own blood and may contain growth factors that increase collagen production. It can be applied topically to the entire treatment area during and after collagen induction therapy treatments or injected intradermally to scars. Efficacy of the combined treatments remains in question pending scientific studies. More serious safety concerns have been cited for these treatments, popularly known as vampire facials, when performed in non-medical settings by people untrained in infection control. The New Mexico Department of Health issued a statement that at least one such business offering vampire facials "could potentially spread blood-borne infections such as HIV, hepatitis B and hepatitis C to clients". In April 2024, the CDC announced that three women who had been patients at the Albuquerque, New Mexico, VIP Spa had been diagnosed with HIV after getting "vampire facials" there. Another almost 200 former clients and their sexual partners were also tested but were found to not have HIV. No mention was made of any testing for other possible blood-borne infections.
== Mechanism == Radioluminescence occurs when an incoming particle of ionizing radiation collides with an atom or molecule, exciting an orbital electron to a higher energy level. The particle usually comes from the radioactive decay of an atom of a radioisotope, an isotope of an element which is radioactive. The electron then returns to its ground energy level by emitting the extra energy as a photon of light. A chemical that releases light of a particular color when struck by ionizing radiation is called a phosphor. Radioluminescent light sources usually consist of a radioactive substance mixed with, or in proximity to, a phosphor.
== Chemistry == Taspoglutide is the peptide with the sequence His-Aib-Glu-Gly-Thr-Phe-Thr-Ser-Asp-Val-Ser-Ser-Tyr-Leu-Glu-Gly-Gln-Ala-Ala-Lys-Glu-Phe-Ile-Ala-Trp-Leu-Val-Lys-Aib-Arg-NH2, where Aib is 2-aminoisobutyric acid (2-methylalanine). In other words, it is the 8-(2-methylalanine)-35-(2-methylalanine)-36-L-argininamide derivative of the amino acid sequence 7–36 of human glucagon-like peptide I.
Sources: en.wikipedia.org
=== Vaccine manufacturers === The companies with the highest market share in vaccine production are Merck, Sanofi, GlaxoSmithKline, Pfizer and Novartis, with 70% of vaccine sales concentrated in the EU or US as of 2013. Vaccine manufacturing plants require large capital investments ($50 million up to $300 million) and may take between 4 and 6 years to construct, with the full process of vaccine development taking between 10 and 15 years. Manufacturing in developing countries is playing an increasing role in supplying these countries, specifically with regards to older vaccines and in Brazil, India and China. The manufacturers in India are the most advanced in the developing world and include the Serum Institute of India, one of the largest producers of vaccines by number of doses and an innovator in processes, recently improving efficiency of producing the measles vaccine by 10 to 20-fold, due to switching to a MRC-5 cell culture instead of chicken eggs. China's manufacturing capabilities are focused on supplying their own domestic need, with Sinopharm (CNPGC) alone providing over 85% of the doses for 14 different vaccines in China. Brazil is approaching the point of supplying its own domestic needs using technology transferred from the developed world.
After the memo began circulating on the internet, Baidu denounced, in a communiqué on 13 September 2008, the approaches by said agency on several occasions, saying the proposal was firmly rejected, as it violated their corporate principles of unbiased and transparent reporting. New Zealand Prime Minister Helen Clark said that she believed the Chinese government had been inclined to try to solve the problem quietly, without a recall. According to the Hong Kong-based South China Morning Post, a 21-point coverage directive issued by the Central Propaganda Department to domestic media includes this edict: "All food safety issues [are] off-limits." Some media outlets speculated that China's desire for a perfect summer Olympics contributed to the delayed recall of the baby milk, citing the 21-point coverage directive. The Central government denied issuing this guidance. Hebei provincial vice-governor said his administration was only notified by Shijiazhuang on 8 September. However, a journalist at Southern Weekend wrote an investigative report in late July for publication about infants who had fallen ill after consuming baby formula from Sanlu. Six weeks later, senior editor Fu Jianfeng made a post on his personal blog stating that this report had been suppressed by authorities because of the imminent Beijing Olympics. While this was happening, Sanlu was honoured in a national award campaign called "30 Years: Brands that Have Changed the Lives of Chinese".
Corticosteroids: Produced by the adrenal cortex, these hormones regulate stress responses, electrolyte balance, and immune function. Glucocorticoids: Involved in carbohydrate metabolism, anti-inflammatory actions, and immunosuppression. Cortisol, which increases blood glucose levels during stress and suppresses immune activity to prevent excessive inflammation. Mineralocorticoids: Control salt and water balance to maintain blood pressure. Aldosterone, which promotes sodium reabsorption in the kidneys, thereby regulating extracellular fluid volume. Sex steroids: Derived mainly from the gonads and adrenal glands, these influence sexual development, reproduction, and secondary sexual characteristics. Progestogens: Essential for preparing the reproductive system for pregnancy. Progesterone, which supports implantation and sustains early pregnancy by maintaining the uterine lining. Androgens: Promote male reproductive development and maintenance. Testosterone, which drives spermatogenesis and the growth of male secondary sex characteristics such as muscle mass and facial hair. Estrogens: Key to female reproductive cycles and skeletal health. Estradiol, which stimulates endometrial proliferation during the menstrual cycle and contributes to bone density. Other steroids extend beyond hormonal roles and include compounds involved in neuroprotection, digestion, and neuromuscular activity:
This would be the driving force behind Morpheus' descent into fanatical terrorism against the system in an attempt to force the machines to reveal Neo's fate; ultimately leading to his assassination. The subject of Neo then fell to the side lines for other struggles; until the arrival of the Oligarchs in Chapter 9. The original intruder, Halborn, was notably intrigued by the life of the One and was personally shocked about the implications of Neo's ability to affect Machines outside of the simulation had on his search for what he called the "Biological Interface Program". After Halborn's removal in Chapter 10, little more was questioned until the revelation of the Trinity project, originally headed by the Oracle, in Chapter 12. It was revealed that both Neo and Trinity were actually the culmination of decades of machine research into translating human DNA perfectly into machine code; allowing them to interface directly with technology without the need for simulated interfaces.
Sources: en.wikipedia.org
== Modern culture == In Richard Wagner's 1882 opera Parsifal, loosely based on Wolfram von Eschenbach's epic poem Parzifal, Amfortas, King of the Grail Knights, is the Fisher King figure who suffers an unhealable wound. The 1922 poem The Waste Land by T. S. Eliot loosely follows the legend of the Fisher King. In the 1945 novel That Hideous Strength by C. S. Lewis, the third book of The Space Trilogy, the philologist Elwin Ransom is, among other roles, the Fisher King. The 1952 novel The Natural by Bernard Malamud (and the 1984 movie) are structured around the basic legend. Pop Fisher is the Fisher King and Roy Hobbs the Percival figure. The 1974 book He: Understanding Masculine Psychology by Robert A. Johnson uses the myth of the Fisher King and Parsifal to explain masculine psychology using Jungian psychological concepts. In Tim Powers' 1979 novel The Drawing of the Dark, the Fisher King is the driving force behind the major plot, and his 1992 novel Last Call relates the Fisher King legend to the Tarot and viticulture, among other things. The 1981 film Excalibur by John Boorman largely bases its version of the Grail Quest upon the mythological pattern of the Fisher King tale, with its wounded Arthur wasting away and Percival healing him by discovering the truth of the Grail mystery. The 1984 comic series Mage: The Hero Discovered revolves around Kevin Matchstick, a character charged with protecting the mysterious Fisher King, as he is the modern Arthur. The second movement of the 1985 orchestral piece Harmonielehre by John Adams is titled The Anfortas Wound.
=== Within lancelets === The notochord of the lancelet (amphioxus) protrudes beyond the anterior end of the neural tube. This projection serves a second purpose in allowing the animal to burrow within the sediment of shallow waters. There, amphioxus is a filter feeder and spends most of its life partially submerged within the sediment.
Vitamin B12 is derived from a tetrapyrrolic structural framework created by the enzymes deaminase and cosynthetase which transform aminolevulinic acid via porphobilinogen and hydroxymethylbilane to uroporphyrinogen III. The latter is the first macrocyclic intermediate common to heme, chlorophyll, siroheme and B12 itself. Later steps, especially the incorporation of the additional methyl groups of its structure, were investigated using 13C methyl-labeled S-adenosyl methionine. It was not until a genetically engineered strain of Pseudomonas denitrificans was used, in which eight of the genes involved in the biosynthesis of the vitamin had been overexpressed, that the complete sequence of methylation and other steps could be determined, thus fully establishing all the intermediates in the pathway. Species from the following genera and the following individual species are known to synthesize B12: Propionibacterium shermanii, Pseudomonas denitrificans, Streptomyces griseus, Acetobacterium, Aerobacter, Agrobacterium, Alcaligenes, Azotobacter, Bacillus, Clostridium, Corynebacterium, Flavobacterium, Lactobacillus, Micromonospora, Mycobacterium, Nocardia, Proteus, Rhizobium, Salmonella, Serratia, Streptococcus and Xanthomonas.
Sources: en.wikipedia.org
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.
REV-ERB receptors generally repress transcription when bound by natural heme. SR9009 is described as an agonist that enhances this repressive activity. The result is altered expression of clock and metabolic genes.
Published controlled human trials are lacking. Some sources cite limited or unofficial reports, but these do not establish safety or efficacy. Claims about human performance effects remain unverified.
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.