RU-58841 is a topical selective androgen receptor modulator (SARM) that can reduce hair loss and block androgenic acne. Active men, particularly bodybuilders, who experience acne and male pattern baldness can benefit from this specialized topical spray, as it blocks the byproducts of testosterone that lead to baldness and alopecia. RU-58841 has proven in recent years to be one of the top preventers of hair loss and acne on the market, with controlled studies that demonstrate its effectiveness.