Mastro contains Drostanolone Propionate, a synthetic derivative of dihydrotestosterone (DHT) developed for clinical use in certain estrogen-dependent conditions and other androgen therapy needs. Known for its strong androgenic properties with mild anabolic activity, Drostanolone Propionate is valued for promoting muscle hardness and density without significant water retention.

Formulated to pharmaceutical-grade standards, Mastro ensures precise dosing, high purity, and reliable stability, making it suitable for controlled therapeutic protocols when prescribed by a qualified healthcare provider.