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Masteron is an injectable preparation containing the steroid drostanolone propionate. Drostanolone is a derivative of dihydrotestosterone, most specifically 2-alpha-methyldihydrotestosterone. As a result, the structure of this steroid is that a moderate anabolic/potent androgen which does not aromatize to estrogen is usually the culprit. Masteron may the fact exhibit antiestrogenic activity in the body, competing with other substrates for binding to aromatase.

Bodybuilders have a strong appreciation for non-aromatizing androgens, and find Masteron very useful as a cutting agent. It is likewise generally used a number of weeks prior to a competition. In a effort to bring out an improved look of density and hardness to the muscles. For this purpose Masteron should work exceptionally well so long as the body fat percentage is low enough. Provided everything fits as is should, the user can achieve that “ripped” look so popular to professional bodybuilding.

The androgenic effect can also be crucial during this period, a time when caloric intake is drastically lowered. The user is provided added “kick” or drive to push through the grueling training sessions leading uo to the show. Drostanolone was once also popular with athletes subject to drug testing, as for a period of time this compound was not screened for during competition.