Structure and Mechanism

Proviron (Mesterolone) is a DHT-derived anabolic steroid with an added methyl group at the 1st carbon, allowing it to survive oral intake. Unlike other oral steroids, Proviron is not C17-alpha alkylated, making it gentler on the liver. Despite a high anabolic rating, its anabolic activity is minimal, while its androgenic effects are strong.

Primary Benefits

• Enhances Free Testosterone: Proviron binds strongly to Sex Hormone Binding Globulin (SHBG), increasing free testosterone and enhancing the effectiveness of other steroids.
• Mild Anti-Estrogenic Effect: It can inhibit aromatase activity, reducing estrogenic side effects, though not as effectively as dedicated Aromatase Inhibitors.
• Fat Loss: By binding to androgen receptors, Proviron can promote fat loss and a harder appearance when lean.
• Fertility Support: Proviron mildly boosts sperm production and quality without heavily suppressing gonadotropins.

Ideal Use Cases

• Cutting: Proviron enhances the hardening effects of other steroids and supports fat loss, especially useful with low-testosterone cutting cycles.
• Breaking Plateaus: Used towards the end of a cycle, Proviron can help break through plateaus by enhancing the potency of other steroids.
• Low-Testosterone Cycles: Adds an androgenic boost for users running lower testosterone doses in cycles.

Dosage and Administration

• Medical Use: 50-75 mg/day in divided doses.
• Performance Use: 50-150 mg/day for 8-12 weeks, often used with cutting steroids like Anavar, Masteron, and Winstrol for enhanced androgenicity and a harder look.