Im a teenager and iv got grey hair only at the roots from 6 years now...is there any cure for it?

GREY HAIR: While it may be unusual, hairs can turn grey in the teenage years. Doctors blame this harmless disorder on decreased melanin (pigment) production. This may be hereditary in some families. If your grandparents or greatgrandparents turned grey at an early age, you can blame it on their genes. Other than dyeing it, there's little else you can safely do. See a dermatologist if you are still worried.