Oil production
Sebum is the oily substance produced in the hair follicle that has both protective and nourishing characteristics. It creates a waxy layer that prevents the damage of the hair structure and keeps strands shiny and well hydrated. As long as this natural oil is produced in normal quantities, you won?t need to wash your hair too often ? twice a week should be more than enough, with an additional treatment or two with dry shampoo if needed. Hyperproduction of sebum will make your hair appear limp and oily, requiring a daily shampoo. Overuse of shampoo can dry your hair out but beware of the rebound effect: the more you clean your strands, the more your sebaceous glands struggle to compensate for the loss. The good news is, as you age, your hair will naturally become drier so you?ll probably notice that you won?t need to wash it as often as before.
...