Dihydrotestosterone, also called DHT or androstanolone (INN), is a hormone androgen (male) mostly coming from testosterone in men, and especially of androstenedione in women, but generally produced in smaller quantities in their cases. DHT is the results from the combined effect of testosterone and 5a-reductase and its function is to stimulate the development and maintenance of masculine characteristics in humans. As androgenetic alopecia concerns 95% of cases of hair loss, DHT plays an important role. Indeed, when the hair follicle becomes more sensitive to dihydrotestosterone, its life cycle is disrupted, and you can see occur important hair loss and even baldness. In women, too much of DHT can cause some virilization, as the appearance of a mustache and deeper voice, etc..