You may have heard that scientists are finally beginning to understand the genetic reasons why hair goes gray later in life. But what's the actual mechanism for hair's changing color? It comes down to the melanin-producing glands in the hair follicle, and what happens when those glands start to run low. But there's a lot that can affect melanin production besides age—watch the video below to learn more.
Why Does Your Hair Turn Gray?
Why Does Hair Grow so Long on Our Heads?
Why Can't Scars Tan Or Grow Hair?
What Makes Hair Curl?
Written by Curiosity Staff May 10, 2017
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