Drostanolone Propionate 100 is a synthetic derivative of dihydrotestosterone, producing an anabolic effect and promoting protein synthesis as well as creating positive nitrogen balance in humans. Since it is a derivative of dihydrotestosterone, drostanolone does not aromatize to estrogens. Drostanolone Propionate 100 has significant anabolic and androgenic properties promoting an increase in 2 strength and growth of muscle tissue while acting as an estrogen antagonist. The combination of a short-acting propionate ester with a longacting enanthate ester pro- duces rapid increases in serum drostanolone levels with a sustained duration of 5-8 days.