The natural aging process of hair involves the gradual loss of melanin, the pigment that gives hair its color. This loss of melanin can cause hair to turn gray or white. However, the question of whether hair turns gray or grows in gray is a matter of semantics.
When hair turns gray, the existing hair shaft loses its pigment. When hair grows in gray, the new hair that grows from the scalp is already devoid of pigment. Both processes can occur simultaneously, leading to a gradual graying of the hair.




