Mesterolone 25  is an oral androgen derived from dihydrotestosterone (DHT). It’s not considered a strong anabolic steroid for mass-building purposes but rather a performance and physique enhancer. Unlike many oral steroids, Proviron is not 17α-alkylated, meaning it does not place the same strain on the liver. It is often praised for its androgenic properties, which enhance muscle hardness, reduce estrogen-related water retention, and increase libido.