Propecia. Propecia (finasteride) is a highly-efficient treatment intended for patients that lose hair too early (some men can start losing hair in their early twenties). It has to do with high amounts of dihydrotestosterone in the body - and Propecia works to prevent the conversion of testosterone to dihydrotestosterone. Propecia (finasteride) is a prescription medication used for the treatment of male design hair reduction (thinning of hair on the scalp),
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