White beard. I convert them into black.

The most important thing that you can do to help yourself is modifying your lifestyle! By that I mean : 1. Eat healthy 2. Sleep on time 11 p.m. at the latest 3. EXERCISE I know these are difficult thing to do especially in today's Info technology age... but it is a must. A bad lifestyle is the biggest enemy of the self today. If you can change that you will keep all these cosmetic diseases at bay. Whatever hair has turned grey might not turn black again but modifying your lifestyle will prevent future greying for sure. Plus,there are medical conditions that can cause such premature greying. To rule those out you will need to visit a dermatologist as soon as possible. That will give you a better idea. And you will get treated appropriately.