Propecia acts by inhibiting the conversion of testosterone into DHT. The desired consequence of lowered DHT in blood is that it can no longer attach itself to receptors in the hair follicles. Hair growth is therefore maintained. About 48% of men with pattern baldness treated with Propecia (1mg/day) reported an increase in hair growth. Nearly 42% of men in the same group have reported a decrease in hair loss. The effect of Propecia is more prominent in the crown area of the head, although some re-growth may occur on the sides as well.
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