A selective androgen receptor modulator, or SARM, is a small molecule that binds to and selectively modulates androgen receptors depending on tissue type. In men, SARMs may be able to:

• Stimulate testosterone's beneficial action in bone, muscle and brain
• Block testosterone's harmful action in the prostate and skin
• Either cross or not cross into the central nervous system to affect lipids

Because of these properties, we believe SARMs could be developed to treat a range of medical conditions and physiological functions, including: