Everything below concerns research chemical. We keep the language plain, cite what the science says, and separate well-supported claims from open questions.
Updated 2026-05-29. 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.
Regulatory status varies by country and intended use. Major drug agencies have not granted marketing authorization for SR9009 as a medicine, and it is not listed as a controlled substance in many jurisdictions. It is often sold as a research chemical, a category that may fall outside pharmaceutical manufacturing rules. Buyers should verify local laws and supplier documentation, including certificates of analysis. The lack of standardized quality controls raises concerns about identity, purity, and actual content in products marketed online.
In laboratory settings, SR9009 is commonly identified by its molecular structure and its interaction with REV-ERB receptors. Vendors may list it under synonyms such as Stenabolic or REV-ERB agonist, but those names do not define purity or identity. Analytical confirmation typically uses high-performance liquid chromatography with ultraviolet detection or liquid chromatography–mass spectrometry. A reference standard is needed to compare retention time and mass spectrum, because the compound can be confused with related research chemicals.
Handling practices for SR9009 focus on minimizing degradation and contamination. The solid is generally stored desiccated at or below -20 °C, protected from light and moisture. Stock solutions are often prepared in dimethyl sulfoxide or ethanol, then aliquoted to avoid repeated freeze–thaw cycles. Aqueous solubility is low, so formulations for animal studies may require cosolvents or suspending agents. Personnel should follow institutional chemical safety procedures, because toxicological data for humans are incomplete.
| 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 |
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.
=== Regulation === In order to ensure proper functioning, Wnt signaling is constantly regulated at several points along its signaling pathways. For example, Wnt proteins are palmitoylated. The protein porcupine mediates this process, which means that it helps regulate when the Wnt ligand is secreted by determining when it is fully formed. Secretion is further controlled with proteins such as GPR177 (wntless) and evenness interrupted and complexes such as the retromer complex. Upon secretion, the ligand can be prevented from reaching its receptor through the binding of proteins such as the stabilizers Dally and glypican 3 (GPC3), which inhibit diffusion. In cancer cells, both the heparan sulfate chains and the core protein of GPC3 are involved in regulating Wnt binding and activation for cell proliferation. Wnt recognizes a heparan sulfate structure on GPC3, which contains IdoA2S and GlcNS6S, and the 3-O-sulfation in GlcNS6S3S enhances the binding of Wnt to the heparan sulfate glypican. A cysteine-rich domain at the N-lobe of GPC3 has been identified to form a Wnt-binding hydrophobic groove including phenylalanine-41 that interacts with Wnt. Blocking the Wnt binding domain using a nanobody called HN3 can inhibit Wnt activation. At the Fz receptor, the binding of proteins other than Wnt can antagonize signaling. Specific antagonists include Dickkopf (Dkk), Wnt inhibitory factor 1 (WIF-1), secreted Frizzled-related proteins (SFRP), Cerberus, Frzb, Wise, SOST, and Naked cuticle. These constitute inhibitors of Wnt signaling. However, other molecules also act as activators.
On 24 December 1944, the 82nd Airborne Division with an official strength of 8,520 men was facing off against a vastly superior combined force of 43,000 men and over 1,200 armored fighting and artillery vehicles and pieces. Due to these circumstances, the 82nd Airborne Division was forced to withdrawal for the first time in its combat history. The Germans pursued their retreat with the 2nd and 9th SS Panzer Divisions. The 2nd SS Panzer Division Das Reich engaged the 82nd until 28 December when it and what was left of the 1st SS Panzer Division Leibstandarte were ordered to move south to meet General George Patton's forces attacking in the area of Bastogne. Some units of the 9th SS Panzer including the 19th Panzer Grenadier Regiment stayed and fought the 82nd. They were joined by the 62nd Volksgrenadier Division. The 9th SS Panzer tried to breakthrough by attacking the 508 and 504 PIR positions, but ultimately failed. The failure of the 9th and 2nd SS Panzer Divisions to break through the 82nd lines marked the end of the German offensive in the northern shoulder of the Bulge. The German objective now became one of defense.
Fire (火) = Heart (心; xīn) and Small Intestine (小腸; xiaǒcháng) (and, secondarily, Sānjiaō [三焦, "Triple Burner"] and Pericardium [心包; xīnbaò]) Earth (土) = Spleen (脾; pí) and Stomach (胃; weì) Metal (金) = Lung (肺; feì) and Large Intestine (大腸; dàcháng) Water (水) = Kidney (腎; shèn) and Bladder (膀胱; pángguāng) Wood (木) = Liver (肝; gān) and Gallbladder (膽; dān) The zàng-fǔ are also connected to the twelve standard meridians – each yang meridian is attached to a fǔ organ, and five of the yin meridians are attached to a zàng. As there are only five zàng but six yin meridians, the sixth is assigned to the Pericardium, a peculiar entity almost similar to the Heart zàng.
Under Khosrow II, the Sassanids occupied the Levant and Egypt and advanced into Asia Minor, and the Avars and Slavs raided in the Balkans. The Empire's control of Italy also weakened. After successfully repelling a siege of Constantinople in 626, Heraclius won a decisive victory at the Battle of Nineveh, eventually defeating the Sassanids later that year. The triumph would prove short-lived. The Arab conquests soon saw the conquest of the Levant, Egypt, and the Sassanid Empire by the newly formed Arab Rashidun Caliphate. By Heraclius' death in 641, the empire had been severely reduced economically and territorially—the loss of the wealthy eastern provinces had deprived the empire of as much as three-quarters of its revenue. The next century is poorly documented. Arab raids into Asia Minor started quickly, and the Empire responded by holding fortified centres and avoiding battle wherever possible. Although Anatolia was invaded annually, it avoided permanent Arab occupation. The outbreak of the First Fitna in 656 gave the Empire breathing space, which it used sensibly: some order was restored in the Balkans by Constans II (r. 641–668) following his administrative reorganisation which over time evolved into the "theme system", a structure that allocated troops to defend specific provinces. Constantine IV (r. 668–685) repelled the Arab efforts to capture Constantinople in the 670s using Greek fire, but suffered a reversal against the Bulgars, who soon established an empire in the northern Balkans.
While iron is the most abundant element on Earth, most of this iron is concentrated in the inner and outer cores. The fraction of iron that is in Earth's crust only amounts to about 5% of the overall mass of the crust and is thus only the fourth most abundant element in that layer (after oxygen, silicon, and aluminium). Most of the iron in the crust is combined with various other elements to form many iron minerals. An important class is the iron oxide minerals such as hematite (Fe2O3), magnetite (Fe3O4), and siderite (FeCO3), which are the major ores of iron. Many igneous rocks also contain the sulfide minerals pyrrhotite and pentlandite. During weathering, iron tends to leach from sulfide deposits as the sulfate and from silicate deposits as the bicarbonate. Both of these are oxidized in aqueous solution and precipitate in even mildly elevated pH as iron(III) oxide.
Sources: en.wikipedia.org
== Sources == Flegel, Melinda J. (2004). Sport first aid: A coach's guide to preventing and responding to injuries. Hong Kong, Japan: Human Kinetics. Lindsay, R., Watson, G., Hickmont, D., Broadfoot, A., & Bruynel, L. (1994). Treat your own strains sprains and bruises. New Zealand: Spinal Publications. Lovering, R.M. (2008). "Physical therapy and related interventions". In P.M. Tiidus (ed.), Skeletal muscle damage and repair (pp. 219–230). United States of America: Human Kinetics. Prentice, William E. "Tissue Response to Injury", Principles of Athletic Training: A Competency Based Approach. 14th ed. New York: McGraw Hill Companies, 2011. 260–277. Subotnick, Steven (1991). Sports and Exercise Injuries: Conventional, Homeopathic and Alternative Treatments. California, United States of America: North Atlantic Books.
Grey matter is composed of cell bodies, dendrites, unmyelinated axons, protoplasmic astrocytes (astrocyte subtype), satellite oligodendrocytes (non-myelinating oligodendrocyte subtype), microglia, and very few myelinated axons. White matter is composed of myelinated axons, fibrous astrocytes, myelinating oligodendrocytes, and microglia. In the peripheral nervous system:
=== Parkinson's disease === Cannabis may provide limited relief for some Parkinson's disease (PD) symptoms, such as pain, sleep issues, or anxiety, based on small human studies (2023–2024, 10–50 participants), but it does not improve motor symptoms like tremors or stiffness (no significant change in Unified Parkinson's Disease Rating Scale scores). A 2023 US survey found 46% of PD patients reported benefits for pain or sleep. Raw Cannabis contains tetrahydrocannabinolic acid (THCA, 15–30% of the plant) and cannabidiolic acid (CBDA), which are non-psychoactive. No human studies have tested THCA or CBDA for PD as of 2025. In regions like India, raw cannabis is used traditionally for tremors, but scientific evidence is lacking. Risks include dizziness from THC (12–20% dropout in studies) and potential interactions with PD medications like levodopa.
The five most-visited websites in the world are Google, YouTube, Facebook, Instagram, and ChatGPT—all of them American-owned. Other popular platforms used include X (formerly Twitter) and Amazon. In 2025, the U.S. was the world's second-largest video game market by revenue (after China). In 2015, the U.S. video game industry consisted of 2,457 companies that employed around 220,000 jobs and generated $30.4 billion in revenue. There are 444 game publishers, developers, and hardware companies in California alone. In the Game Developers Conference (GDC) 2025 survey, 58% of responding game developers were based in the U.S. Media freedom was classified as "problematic" by Reporters Without Borders in 2026, and scholars have noted a significant rise in censorship and self-censorship in recent years.
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.
Liquid chromatography–mass spectrometry is common for identity and purity checks. High-performance liquid chromatography with ultraviolet detection can also be used. Both methods require a suitable reference standard.