system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some people get white hairs while they're still fairly young?

I understand a little about melanin production slowing down as we get older, but does that also explain why I just found a white hair while I'm still in my 20's? What about people who get white hairs in their teens?
gpt
Hair gets it's color from melanin, like what gives your skin pigment. As people age, there is less pigment cells, or melanin in the hair follicle. When the follicle stops producing the pigment for your hair, it can become white or a gray color. This can be genetically determined so make sure to thank your parents for your white hair.