DROSTANOLONE PROPIONATE 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 have significant anabolic and androgenic properties promoting an increase in strength and growth of muscle tissue while acting as an estrogen antagonist. The combination of a short-acting propionate ester with a long-acting enanthate ester produces rapid increases in serum drostanolone levels with a sustained duration of 5-8 days. CAS number: 521-12-0. Dosation: 1000mg/10ml. The package has been changed.