Pull out 1 gray hair and 10 will grow back
No one's sure where this old wives' tale originated, but it's been passed down from generation to generation and shows no sign of letting up. That's despite the fact that pretty much everyone agrees it isn't true. If you pull out a strand, the same follicle will grow a single new one. What does account for the fact that your hair is turning white? Blame it on genetics — and the fact that, as we age, hair follicles stop producing the cells that color our locks.