Statistics show that androgenetic alopecia is the cause of 94–97% of cases of hair loss in men. The very name of the condition points to the clear link between hair loss and androgens – male sex hormones. It has long been known that castration halts the hair loss process in men in absolutely all cases, while androgen intake (as replacement therapy, for example) causes it to resume.
Alopecia is not purely a male problem, however. Around 60% of women over 40 complain of increased hair loss and thinning of the hair on the head, and the presence of a problem is confirmed by a trichologist in 30% of cases. Hair loss in women is of course far less pronounced than in men, because of the significantly lower level of male sex hormones in their bodies. Still, it is women who most often visit hair loss specialists.