You really need to do something with that. I can propose you somewhat universal cure for that matter really. I do not get why it's not there yet - https://www.redorbit.com/say-goodbye-to-hair-dye-how-to-get-rid-of-gray-hair-naturally/ Post some feedback.
I do not know what to suggest in that case for you, many of my classmates already do have grey hair anyway and I do not recommend you to follow their route anyway. There are for sure something which you can really use in that case but you need to wary of fake cures.
How old are you that you already have it if you don't mind me asking please ? Care to share that all with us or it's some sort of secret info or so ? Let's make it possible in much more ways anyways. How else you could make it ?