S-4

S-4 belongs to a class of chemicals known as SARMS or selective androgen receptor Modulators. Compared to testosterone and other anabolic steroids and pro hormones, advantage of the SARMS such as S-4 is that they do not have androgenic activity in non skeletal

muscle tissues.

S4 was designed for treatment of conditions such as muscle wasting, osteoporosis and benign prostatic hypertrophy, using the non-steroidal androgen antagonist bicalutamide as a lead compound.

S-4 also fits into a cutting protocol for concurrent reduction in body fat with maintenance of muscle mass in a hypocaloric environment.

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