Andarine (S4)

Andarine (S4) is a selective androgen receptor modulator (SARM) that binds to androgen receptors involved in muscle and bone tissue regulation. In bodybuilding, Andarine is primarily associated with cutting phases, lean muscle preservation, strength development and improved body composition.

Andarine is intended to support the maintenance of muscle mass during calorie-restricted periods while promoting anabolic activity in muscle tissue. It is also associated with potential benefits for bone metabolism and muscle strength. Unlike traditional anabolic steroids, Andarine is designed to act selectively on androgen receptors in certain tissues. S4 is simply another designation for Andarine, not a different compound or ester.