S-23 is an orally bioavailable, nonsteroidal selective androgen receptor modulator (SARM) that has been proven to increase lean muscle and bone tissue while being tissue selective (unlike traditional steroids). Studies and user reports suggest that S-23 is the closest SARM to steroids, with a few key differences, such as decreased prostate size. Other user reports suggest that S-23 is a much more powerful version of S4 Andarine) and the benefits of this SARM falls in the category of hardening muscle and creating a grainier aesthetic look. S-23 works by specifically targeting chemical receptors in the muscles to skeletal bone masses of the body. After being stimulated, these muscle and bone groupings are encouraged to grow by utilizing stored energy reserves. Do not exceed 2-3 capsules per day.