Going bald after the age of 50 is typical for around half of men (and for a quarter of women too). The reason for this is a widespread hereditary disease, androgenetic alopecia, which is also called “male pattern baldness.” Due to this condition, hair follicles shrink, and hair becomes thinner and shorter, and eventually disappears.Follicle shrinkage can be caused by sensitivity to dihydrotestosterone, a by-product of testosterone. This means that the more muscle-building hormone a man has, the more likely it is that he will become bald.