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Propecia
Finasteride is an oral medication, manufactured by Merck, which blocks the conversion of testosterone to dihydrotestosterone (DHT), the form of the hormone that causes male pattern baldness. It does this by inhibiting the action of the type II 5-alpha reductase enzyme that is present in higher concentration in and around, the hair follicles of balding men with androgenetic alopecia.
Next: Rogaine
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