Im 17 and I discovered a single grey hair in my hair. I did some research and most sites said that premature greying is curable. However, other people are telling me that this hair will always stay grey. Is premature greying really curable and will that grey hair grow back to black again?

If you found one or a couple of gray hair, this doesn't mean you are going prematurely gray. It's common for people or teenagers to get a few gray hair.

There's no cure for gray hair. The most common reason for premature graying is heredity, stress or hormonal changes. There are also others factors that can play a role in gray hair, such as lack of the proper vitamins in the diet or a medical condition. If you are bothered by the single hair gray, you could pull it out or dye it.