Question

why older persons have only white hairs..? why not black?????tell me??..​

Answer 1

Answer:

because As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent color — like gray, silver, or white — as it grows.

Answer 2

Explanation:

Gray hair has minimal melanin, while white has none. As you age, it's natural to lose melanin in your hair. In fact, it's estimated that the odds of your hair turning gray increase up to 20 percent each decade after you hit your 30s. Some people see grays a bit sooner due to health and genetics.