High-Quality STROMUSC SR9009 10mg For Bodybuilding CAS:1379686-30-2
In the ever-evolving landscape of performance enhancement, few compounds have generated as much intrigue—and as much confusion—as SR9009. Commonly marketed under the trade name Stenabolic, this synthetic molecule has carved out a unique niche in bodybuilding circles, not because it builds muscle like traditional anabolic agents, but because it does something entirely different. Developed at the Scripps Research Institute in the laboratory of Professor Thomas Burris, SR9009 was never intended for the physique world. It was designed as a research tool to study circadian rhythm regulation and metabolic disease. Yet somewhere along the way, it escaped the lab bench and found its way into the hands of athletes and bodybuilders seeking an edge.
What SR9009 Actually Is
Before anything else, a fundamental clarification is necessary: SR9009 is not a SARM (Selective Androgen Receptor Modulator). It does not bind to the androgen receptor. It has zero anabolic androgenic activity. The widespread misclassification of SR9009 as a SARM is one of the great ironies of the research chemical market-a compound developed to study circadian biology being sold alongside compounds designed to modulate androgen signaling.
SR9009 is a synthetic small-molecule pyrrole derivative with a molecular weight of approximately 437.9 daltons and the chemical formula C₂₀H₂₄ClN₃O₄S. It functions as an agonist of the nuclear receptors REV-ERBα (NR1D1) and REV-ERBβ (NR1D2). These receptors are not involved in muscle growth pathways. Rather, they are core components of the mammalian circadian clock-the internal timekeeping system that regulates everything from sleep-wake cycles to metabolic activity to inflammatory responses.
When SR9009 activates these REV-ERB receptors, it modulates circadian gene expression and, through that mechanism, influences a broad array of downstream metabolic processes. In skeletal muscle, REV-ERB activation increases mitochondrial content and oxidative capacity. The compound upregulates genes involved in mitochondrial biogenesis, fatty acid oxidation, and glucose utilization. In the liver, it suppresses genes involved in lipogenesis (de novo fat synthesis) and gluconeogenesis. In adipose tissue, it reduces fat storage by downregulating genes involved in triglyceride synthesis.
The net effect, in animal models, is an increase in energy expenditure and a shift toward a leaner metabolic phenotype. The landmark 2013 rodent study by Woldt et al., published in Nature Medicine, demonstrated that REV-ERBα activation in skeletal muscle produced a gene-expression signature that resembled endurance training-more mitochondria, better mitophagy, and roughly a 50 percent increase in treadmill time to exhaustion.
Features of Top-Quality SR9009 10mg Tablets
A 10mg tablet of SR9009 represents a standardized unit dose designed for convenient administration. Top-quality products typically come in bottles containing anywhere from 60 to 90 tablets, providing sufficient material for a full cycle. The 10mg dosage is significant because it aligns with the most common per-administration recommendation in the bodybuilding community-one tablet taken multiple times throughout the day.
What distinguishes a top-quality product from a questionable one comes down to several factors: manufacturing standards, purity, third-party testing, and accurate labeling. The research chemical market is notoriously unregulated, and quality varies dramatically between suppliers. Regulatory agencies have issued warnings about products containing significantly less active ingredient than stated on the label. A top-quality SR9009 tablet should come from a manufacturer that provides certificates of analysis from independent laboratories verifying both identity and potency.
Applications in Bodybuilding
SR9009 serves a specific and somewhat narrow function in the bodybuilding toolkit. It is not a mass builder. It does not produce the dramatic size gains associated with anabolic steroids or even most SARMs. Instead, its value lies in what it does for conditioning, endurance, and metabolic efficiency.
Endurance Enhancement
The most consistently reported benefit of SR9009 is improved endurance. Users describe better work capacity-the ability to complete more sets, sustain higher training volumes, and push through cardio sessions with less perceived effort. This is consistent with the compound's mechanism: increasing mitochondrial density and oxidative capacity in skeletal muscle means muscles can produce energy more efficiently during prolonged activity.
Fat Loss Support
SR9009 has gained a reputation as a useful adjunct during cutting phases. By increasing metabolic rate and promoting fat oxidation, it can help bodybuilders achieve the low body fat percentages required for competition or photoshoots. Some users report that stubborn fat deposits-particularly abdominal fat that resists traditional dieting-become more responsive when SR9009 is added to the protocol.
Recomposition Aid
In combination with other compounds, SR9009 can support body recomposition-the simultaneous loss of fat and preservation (or modest gain) of muscle tissue. While SR9009 itself does not directly stimulate muscle growth, its metabolic effects create a more favorable environment for lean tissue retention during caloric deficits.
On-Cycle Lipid Support
Bodybuilders running suppressive cycles with anabolic steroids or certain SARMs often experience unfavorable changes in lipid profiles. SR9009 has been shown in preclinical studies to improve cholesterol parameters, making it a potentially useful addition to cycles where lipid management is a concern.
Benefits
Non-Hormonal Mechanism
The most significant advantage of SR9009, from a bodybuilding perspective, is that it operates through a completely non-hormonal pathway. Because it does not interact with the androgen receptor, it does not suppress natural testosterone production. It does not aromatize to estrogen. It does not affect the hypothalamic-pituitary-gonadal axis. This means it can be used by both men and women without the hormonal side effects associated with androgenic compounds.
No Testosterone Suppression
This is worth emphasizing: SR9009 does not suppress endogenous testosterone production. For bodybuilders who are not on testosterone replacement therapy, this is a major consideration. Many performance-enhancing compounds require post-cycle therapy to restore natural production. SR9009 does not.
Cognitive and Mood Effects
Some users report ancillary benefits including reduced anxiety and improved mood. While this is not the primary reason bodybuilders use SR9009, it is worth noting as a potential secondary benefit.
Anti-Inflammatory Properties
SR9009 has demonstrated anti-inflammatory effects in research settings, which may translate to faster recovery between training sessions.
Dosage Protocol
The dosage of SR9009 is where things get complicated-and where many users go wrong.
The Bioavailability Problem
Here is the uncomfortable truth: oral SR9009 has extremely poor bioavailability, estimated at approximately 2 percent in rodent models. The vast majority of an orally administered dose is destroyed by first-pass hepatic metabolism before reaching systemic circulation. The impressive preclinical results-the 50 percent increase in endurance, the mitochondrial biogenesis-were obtained via injection, not oral administration. The Burris laboratory, which developed SR9009, explicitly moved away from it as a chronic-dosing compound because of this bioavailability problem, describing optimized successor compounds with oral bioavailability around 23 percent as the useful in-vivo probes.
This means that the dosing protocols used in bodybuilding are, to some extent, attempts to compensate for a fundamental pharmacokinetic limitation.
Standard Dosing
Despite the bioavailability issues, the bodybuilding community has developed practical dosing protocols based on user experience. The standard recommendation is 20 to 30 milligrams per day, divided into multiple doses. With 10mg tablets, this translates to two to three tablets daily.
For men, the typical protocol is three 10mg doses, spaced approximately four to five hours apart. Common scheduling involves taking one tablet upon waking, one in the early afternoon, and one in the late afternoon or pre-workout.
For women, some sources recommend a lower total daily dose of 10 to 20 milligrams, which may mean one or two tablets per day.
The Split-Dose Rationale
The split-dosing protocol exists because SR9009 has a short half-life. Estimates vary widely-some sources cite approximately four hours, while others suggest it may be significantly shorter. Regardless of the exact number, the consensus is clear: a single daily dose will not maintain meaningful plasma concentrations throughout the day. Dosing every four to five hours helps maintain more consistent exposure.
Pre-Workout Timing
Many users time one of their doses to coincide with training. Taking a 10mg tablet approximately 30 to 60 minutes before a workout can provide elevated energy and endurance during the session.
Cycle Length
The typical SR9009 cycle runs from four to twelve weeks. Shorter cycles of four to eight weeks are common among first-time users. More experienced users may extend to ten or twelve weeks.
The variability in cycle length reflects the compound's non-hormonal nature-because it does not suppress testosterone, there is less concern about prolonged suppression. However, this does not mean there are no risks. The compound has never been tested in human clinical trials, and the long-term effects of chronic REV-ERB modulation are unknown.
A standard approach is to run an eight-week cycle followed by an equal period off. This "time on equals time off" protocol provides a buffer against potential effects and allows the body to reset.
Half-Life and Dosing Strategy
The half-life of SR9009 is a subject of considerable debate. Published estimates range from approximately four hours in some sources to as short as thirty minutes in others. This wide range reflects the fact that human pharmacokinetic data does not exist-all estimates are extrapolated from rodent studies or based on user reports.
What is not debated is that the half-life is short enough to require multiple daily administrations. A compound with a four-hour half-life will be largely cleared from the system within twelve to sixteen hours. A compound with a thirty-minute half-life will be cleared within hours. In either case, once-daily dosing is ineffective.
The practical implication for bodybuilders using 10mg tablets is straightforward: spread the doses throughout the day. Three tablets taken at morning, midday, and late afternoon provides coverage across the waking hours. Some users take doses as frequently as every three hours. The key is consistency-SR9009 is not a compound where a missed dose can be compensated for by doubling up.
Post-Cycle Therapy (PCT)
This is perhaps the simplest section of this entire article: SR9009 does not require post-cycle therapy.
Because SR9009 does not suppress natural testosterone production, there is nothing to "restart." The hypothalamic-pituitary-gonadal axis remains intact throughout the cycle. There is no need for SERMs like Clomid or Nolvadex. There is no need for aromatase inhibitors. There is no need for any of the pharmaceutical interventions typically associated with PCT.
Some bodybuilders choose to continue using SR9009 during PCT for other compounds-using it as a non-suppressive tool to maintain conditioning while recovering from a suppressive cycle. This is a reasonable strategy, though it should not be confused with PCT itself. SR9009 is an adjunct during PCT, not a replacement for PCT.
Side Effects and Considerations
The side effect profile of SR9009 is not well characterized due to the absence of human clinical trials. Reported side effects from user experiences include insomnia (particularly if dosed too close to bedtime), lethargy, gastrointestinal distress, and headaches.
There is also the broader consideration of sourcing. The research chemical market is unregulated. Products may be mislabeled, contaminated, or contain entirely different compounds. Regulatory agencies in multiple countries have issued warnings about the health risks associated with unregulated SARMs and related compounds.
SR9009 was added to the World Anti-Doping Agency (WADA) Prohibited List in 2016 under class S4.5 (hormone and metabolic modulators). Athletes subject to anti-doping testing should be aware that SR9009 is prohibited both in and out of competition.
Clinical Data
|
Brand |
STROMUSC |
|
Trade names |
SR9011,Stenabolic |
|
CAS |
1379686-29-9 |
|
Molar mass |
479.04 |
|
MF |
C23H31ClN4O3S |
|
Purity |
Above 98% |
|
Apprarance |
10mg*100 |
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ConclusionFinal Thoughts
SR9009 occupies an unusual position in the bodybuilding pharmacopeia. It is not a mass builder. It is not a SARM. It does not suppress testosterone. It does not require PCT. What it does offer is a genuinely interesting mechanism-circadian modulation that enhances mitochondrial function, increases oxidative capacity, and supports fat loss.
The 10mg tablet format provides a convenient way to implement the split-dosing protocol that the compound's short half-life demands. Three tablets daily, spaced four to five hours apart, represents the standard approach. Cycles of eight to twelve weeks are typical, followed by an equal period off.
The bioavailability problem is real and significant. The compound was never designed for oral administration, and the impressive results from animal studies were achieved through injection. Users should have realistic expectations-SR9009 is a useful adjunct for conditioning and metabolic support, not a magic bullet.
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