Proviron, or Mesterolone, is a synthetic anabolic steroid often used in bodybuilding and hormone replacement therapy (HRT) to improve androgenic activity and prevent estrogen-related side effects. Unlike other anabolic steroids, Proviron does not significantly promote muscle growth, but it helps enhance strength, libido, and mood. It is commonly used during steroid cycles to counteract estrogenic effects like water retention and gynecomastia. Proviron is also known for its ability to support natural testosterone levels and improve overall performance.