SR9009, also known as Stenabolic, is a selective androgen receptor modulator (SARM) that has been referred to as ‘exercise in a bottle’. Initial trials on mice showed an increase in muscle and metabolic rate without exercise, and enhanced stamina with exercise. Essentially, SR9009 has shown promise to improve endurance and metabolism to become leaner.

SR9009 was first developed by Professor Thomas Burris from The Scripps Research Institute. Initial findings were published in the journal Nature Medicine in 2012, with studies showing that Stenabolic significantly increases exercise endurance in animal models.

The compound affects the core biological clock, synchronizing the body’s circadian rhythm with the 24-hour cycle of day and night.



The compound SR9009 works by binding to one of the body’s naturally occurring molecules, called Rev-Erbα. This molecule influences lipid and glucose metabolism in the liver, the production of fat-storing cells, and the response of macrophages (cells that remove dead or dying cells) during inflammation.

The study showed that mice lacking Rev-Erbα had decreased muscle metabolic activity and running capacity. However, Burris’ group demonstrated that activation of Rev-Erbα using Stenabolic led to increased metabolic activity in skeletal muscle in both culture and mice. The difference was a 50% increase in running capacity for mice treated with SR9009 – even when exercise was restricted.

Professor Burris explained that the study resulted in animals developing muscles just like an athlete who has been training, even when they haven’t. He believes that Rev-Erbα affects muscle cells through the creation of new mitochondria, and the removal of defective mitochondria via macrophages.

Basically, SR-9009 is one of the strongest endurance boosters out there. It is often compared to GW-5051516 (Cardarine) because the benefits are comparable.

High Purity Stenabolic Sr9009 , Sarms Muscle Building CAS 1379686-30-2 1

There are 7 primary benefits of SR9009 that have been observed in both initial studies and user-reported reviews.

  1. SR9009 increases weight loss

  2. SR9009 increases stamina and endurance

  3. SR9009 may lower blood cholesterol

  4. SR9009 indicates a decrease in inflammation

  5. SR9009 may increase wakefulness

  6. SR9009 may reduce heart disease

  7. SR9009 may effectively reduce anxiety


The best SR9009 dosage should be roughly 30 to 40mg per day for a 10-12 week cycle. If you personally think that SR9009 dosage is too high, you can always start out with 10 to 20mg to see how you react to the compound. Although keep in mind that SR9009 has a very short half-life, so maybe that would not be the best idea.

SR9009 SARMs Dosage Table

SR9009 SARMs Dosage Table

As there are no clinical studies yet on human dosing, these are guidelines only and users should adjust their dose by 10mg to find their sweet spot. Always make sure to build the SR9009 dosage up gradually.

Due to the short half-life of SR9009, it is recommended to spread the dose across 3-4 times per day. Let’s say you are taking 40mg of SR9009, this means that you will have to take 10mg every 4 hours. This is essential, the drug needs to be stable within your body to produce the best results.

With other SARMs, you can get away with dosing once a day but unfortunately with your SR9009 dosage that is not the case. What’s also great about SR9009 is that it is used by both male and females.

30-40mg per day

30-40mg per day

If you want my advice regarding the best SR9009 dosage, start out small and build your dose up gradually. You can just start out by taking 10mg a day and see where that takes you.

High Purity Stenabolic Sr9009 , Sarms Muscle Building CAS 1379686-30-2 3

This anabolic drug has a short half-life i.e. around 4 hours. However, this does not mean that you should take a dose every 4 hours.

The ideal dosage for Sr9009 is 40 mg per day. You can split this dose into 2 or more intervals. It is recommended to take a dose of 1 to 2 hours before physical activity.

In addition, the recommended cycle duration for Sr9009 is 12 weeks maximum. Also, when you complete one cycle, make sure you take a 4 weeks break before starting the next one and take proper PCT meanwhile.