What is the youngest age for you to start getting gray hair?

No telling: Genetics plays crucial role in that. Grey hair has been reported in small kids, and some are born with streaks of it, so it's hard to tell when you're going to get your first one.

There is no specific: Age. Reasons to gray early. 1. Genetics. 2. Age 3. Stressors. The age of initial graying is largely a matter of genetics. However stressors such as nutritional deficiencies, traumatic head injuries, low vitamin b levels, zinc deficiency, severe illness, surgery and marked emotional stress may impact earlier depigmentation in people who are already predisposed to gray hair. In general – genetics.