Mesterolone (commonly known by its brand name Proviron) is an oral synthetic androgen and anabolic-androgenic steroid (AAS) derived from dihydrotestosterone (DHT)

  • SHBG Binding and Free Testosterone: Mesterolone has a high affinity for sex hormone-binding globulin (SHBG). By binding to SHBG, it can displace other androgens and increase free testosterone levels in the blood. [1, 2]
  • Estrogen Antagonist / Aromatase Inhibition: It exhibits weak competitive aromatase-inhibiting properties and helps reduce estrogenic side effects or water retention when stacked with aromatizing steroids. [1, 2, 3]
  • Libido and Mood Support: Because it is a DHT derivative, it is frequently used during cutting or steroid cycles to counteract drops in libido, mood, or energy. [1, 2, 3]
  • The “Lean/Dry” Look: Bodybuilders sometimes use it toward the end of a preparation phase to promote a harder, drier appearance, though its direct anabolic effect on skeletal muscle is considered weak

25mg to 50mg a day for 8 to 16 weeks