SARMs mimic testosterone by binding to hormone receptors in specific parts of the body. Similar to testosterone and other SARMs, S-23 powder targets the muscle and bone tissues to promote muscle growth and bone health. Unlike testosterone, S-23 powder does not target the prostate tissue so it does not cause prostate enlargement. It is allegedly effective at increasing muscle mass and decreasing fat all while having minimal side effects. Also S-23 has a unique and complicated effect on bones and muscles( it's stimulate the genes responsible for building muscle proteins and it does this by binding itself to androgens.) When activated, the body’s receptors will then help stimulate bone-building cells.