For some people, it becomes an obsession by the time they’re in college. For most, it’s a reality by the time they hit their 40s. While going gray isn’t even close to the worst thing that can happen to us as we age, we still worry about perceptions. Even if heredity tells you otherwise, doctors say there is a way to help keep the gray away. But it does come with some health risks. What you eat does have an impact on your hair. The question is, is it worth the risk? For many, the answer is a resounding yes…