STEN X or scientifically known as Stenabolic (SR9009), is a supplement developed at Scripps research institute by Professor Thomas Burris. Do not mistake it for a selective androgen receptor modulator (SARM). This supplement is a Rev-Erba agonist. A study published by the Journal of Natural Medicine in 2013 concluded that the Stenabolic aided with endurance and obesity in animals. SR9009 is not FDA approved, but that has not stopped it from becoming popular amongst athletes as a means to help them increase endurance and promote fat loss.
The Journal of Natural Medicine study: “Rev-erb-α is a major physiological regulator of mitochondrial content and oxidative function. Thus, pharmacological activation of Rev-erb-α may be a promising approach for the treatment of skeletal muscle diseases with compromised exercise capacity.”