[SleepyButch]

So I'm lying here on my bed and got to thinking about the important topic of the day... why are my eyebrows still dark when the top of my head is almost all white? I know... you were thinking the same thing right?

So I looked it up and found a podcast called Ask the Naked Scientist. I started listening and it said that the reason we lose the color of our head hair is because the hair follicles that color the hair contain melanocytes and these are the cells that add melanin, the dark color to hair.

For some reason and not uniformly across the head, these melanocytes clap out after awhile and stop adding melanin to the hair so hair reverts back to its natural color which is white because it's made of keratin and the color of keratin is white.

So their theory is that the eyebrow hair grows more slowly than your head hair and are under less pressure so the melanocytes don't expire as quickly.

It's interesting. I guess I never really thought about it but it makes sense.