Proviron 55 - Stealth Labs

Schering launched Mesterolone as Proviron® in 1934, making it the earliest clinically used oral androgen for men. This compound played a pioneering role in hormone replacement therapy before injectable testosterone became standard. Its low anabolic activity limited its use in muscle-building, but strong androgenic effects, oral availability, and minimal hormonal suppression contributed to decades of medical acceptance, especially across Europe and parts of Asia. It was never marketed in the U.S..

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For detailed information about Proviron 55 by Stealth Labs, consult with your doctor or healthcare professional.