S4 SARM (Powder)
S4 SARM results
S4 SARMS Review
S4, also known as Andarine, Andarin, S-40503, or GTx-007, is a SARM that selectively binds to androgen receptors in skeletal muscle tissue.
Clinical studies have shown that it does not convert into estrogen, cause liver values to worsen, or severly affect testopsterone levels.