Why do men start going grey at the temples?
As you age, your hair follicles stop producing the pigment melanin, but this doesn't happen all at once nor all in the same place.
Asked by: Anonymous
Men’s hair (indeed women’s too) goes grey when the follicles stop producing enough of the pigment, melanin, to provide the colour. Also, every hair makes some hydrogen peroxide, which is a bleach and this builds up over time, especially if you’re stressed. So hair bleaches itself from the inside out. Why greying usually starts around the temples remains unknown.