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SR9009 (Stenabolic) Benefits, Side Effects & Safety Information

Published: 13th May 2018. Last updated: 21th July 2019.

Shaun Ward MSc ANutr

Staff Writer


SR9009, also known as stenabolic, is a synthetic drug that was initially developed for the purpose of studying the circadian rhythm. This is the natural process which regulates the sleep-wake cycle and repeats itself roughly every 24 hours.

However, as research on this compound started to be carried out it began to be continuously linked to weight loss, cholesterol levels, inflammation, anxiety, and endurance.

Although SR9009 is often referred to as a SARM, it actually does not belong to the SARMs family. SR9009 is better defined as a REV-ERB agonist, with REV-ERBs being a group of nuclear receptors that are essential components of the circadian clock.

Before reading this review, please note that the research on SR9009 is very new and is yet to be tested on humans. At the moment its efficacy is based on presumptions from the findings within animal and lab-based studies.

Does SR9009 Work?

Below is a list of every potential benefit that's backed by credible scientific research:

It May Protect Against Cancer

As REV-ERB agonists are closely linked to the circadian rhythm, SR9009 was hypothesized to be a potential therapeutic strategy for treating cancer.

These types of compounds have demonstrated many times to be lethal towards cancer cells while having no effect on the viability of normal cells or tissues [1].

In simple terms, drugs like SR9009 bind to REV-ERB receptors, suppress their activity, and influence metabolic processes such as the metabolism, growth, and differentiation of tumor cells.

Much data has confirmed that SR9009 possesses anticancer activity by also down-regulating a number of pathways involved in tumor development.

Given, multiple findings have suggested that pharmacological modulation of circadian regulators is an effective anti-tumor strategy [2].

It May Improve Fitness Levels

SR9009 may be more than just a treatment for cancer, as it has also been found to [3]:

  • Increase basal oxygen consumption
  • Decrease lipogenesis, cholesterol and bile acid synthesis in the liver
  • Increase mitochondrial content
  • Improve glucose and fatty acid oxidation in the skeletal muscle
  • Reduce fat storage in adipose tissue

Importantly, these types of metabolic improvements are all factors that can improve exercise capacity and body composition, making SR9009 a very attractive drug for athletes [4].

As it may significantly increase daily energy expenditure, this subsequently helps people to reduce fat mass. In clinical settings, this could be used for the treatment of several metabolic disorders caused by obesity [5].

It May Reduce Inflammation

There is more to REV-ERB agonists than just their ability to control the amount of adipogenesis [6], as much data also conveys their ability to lower inflammatory responses from immune cells such as macrophages [7].

REV-ERB’s are able to regulate several important genes involved in different steps of the autophagy process, including those dedicated to the removal of damaged mitochondria from within the cell.

Considering this, REV-ERB’s act through two separate mechanisms, the generation of new mitochondria, and the clearance of impaired mitochondria [8] [9].

It May Improve Endurance

From a performance enhancement perspective, as REV-ERB’s interact with the drivers of mitochondrial biogenesis such as PGC-1α, they are able to regulate gene expression and influence the amount and size of mitochondria present within muscle cells [10].

It is clear from animal studies that animals deficient in REV-ERB’s severely reduce their running capacities due to having a oxidative capacity that stems from the lack of mitochondrial content. Likewise, an over-expression of REV-ERB’s significantly improve running capacity, mitochondrial respiration, and muscle oxidative capacity [11].

An amazing finding so far is that SR9009 can significantly increase endurance within just 30 days of intake, with mice being able to run significantly longer distances for greater periods of time [12].

SR9009 Safety And Side Effects

Current studies have found that SR9009 can induce its benefits without without causing any overt toxicity [13].

However, this does not necessarily deem them completely safe.

Most studies do not report any significant amount of side effects to cause any major reason for health concerns with this drug, but long-term trials in humans are needed to clarify its safety.

How To Use SR9009?

There is currently no recommended human dose for SR9009, as clinical research is severely lacking.

Based on the research from animal studies, ~100mg per kg of bodyweight is used, however this does not necessarily apply to humans and it is not guaranteed that this dose is safe.

If people are going to experiment with SR9009, it is advised to take alongside a fat-rich meal, due to the compound being fat-soluble.

According to online forums, typical doses people are experimenting with are 10-50mg per day, split into 3-4 doses due to the short 4 hour half-life of SR9009.

Is SR9009 Legal?

Although SR9009 is not actually a SARM, it is still treated as one within legal frameworks.

REV-ERB agonists are currently undergoing clinical evaluation, and therefore they are not approved for therapeutic use in humans in any country.

At the moment they are only being produced and made available to purchase on the black market from non-pharmaceutical labs. This is a key reason why the safety of SR9009 cannot be guaranteed.

However, unlike other SARMs (although it technically isn’t one), SR9009 is not officially published on the “Prohibited List” by the world anti-doping agency. However, there is reason to believe it could potentially be classified within the “Hormone and Metabolic Modulator” class, as part of a grey area.

It is advised that athletes check the legality of the drug with their sporting federations, as it could result in an anti-doping violation.


SR9009, also known as stenabolic, is a drug that was initially developed to regulate the circadian rhythm.

However, newer evidence implies it may be useful for reducing inflammation, improving endurance performance, and preventing certain types of cancers.

At this time SR9009 has not proved its safety and is not recommended for human consumption.

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