S4 (Andarine) – 25MG 50CT

S4, also known as Andarine, Andarin, S-40503, or GTx-007, is a SARM that selectively binds to androgen receptors in skeletal muscle tissue. There is little danger of nonskeletal muscle tissues experiencing androgen activity.  Additionally, research has shown it does not cause aromatization (conversion of testosterone into estrogen), liver strain, or severe HPTA (hypothalamic pituitary testicular axis) suppression. Aside from building lean body mass, andarine is also used for benign prostatic hypertrophy, muscle wasting, and osteoporosis.