Masteron is a injectable preparation containing the steroid drostanolone propionate. Drostanolone is a derivative of dihydrotestosterone, most specifically 2alpha-methyldihydrotestosterone. As a result, the structure of this steroid is that of a moderate anabolic/potent androgen which does not aromatize to estrogen. Water retention and gynecomastia are therefore not a concern with this compound; as of course here estrogen is usually the culprit. Masteron may in fact exhibit antiestrogenic activity in the body, competing with other substrates for binding to aromatase. This would reduce the conversion rate of other steroids, Masteron acting in the same manner as the oral steroid Proviron.
The propionate ester used with this compound will extend its activity for only a few days. With such a short duration of effect, injections need to be repeated at least every 3 or 4 days in order to maintain a consistent level of hormone in the blood. Factoring this in with its low strength (50mg/ml), men will generally inject a full 2ml ampule of Masteron (100 mg) every two or three days. The weekly dosage therefore lands in the range of 200350mg, a level more than sufficient to receive good results. We also should mention that while some women do profess to using this item before a show, it is much too androgenic in nature to recommend. Virilization symptoms can result quickly with its use, making Masteron a very risky item to experiment with. If attempted, the dosage should be limited to no more than 25 to 50mg each week. The female athlete would be further served by increasing the number of days between injections to prevent buildup of steroid in the body. In this case, Masteron can perhaps be administered once every 7 days.
Dosage instruction : 50mgs/week (100mg Every other day) to 500mg/week
Reference cycle : 150mg Testosterone propionate every other day
50mg Trenbolone acetate every day (or 100mg every other day)
150mg Masteron (propionate) every other day
50mg Winstrol every day, last 4 weeks of cycle only