GRAY HAIR
Here are recommendations for graying hair:

Eat for hair health. The Chinese have long discovered that black sesame seeds, black beans, and walnuts reverse graying. For healthy and shiny hair, eat foods everyday that are rich in essential fatty acids and omega-rich nutrients: flaxseed oil, sesame oil, olive oil, virgin coconut oil, avocado, beans, nuts and seeds.
Chinese herbs for graying hair. "Shou wu" (also called "fo-ti" or polygonum root) is a hair nurture supplement available in Asian herb stores, used to restore hair growth and reverse graying. Rich in vitamin E and the B-complex vitamins, Shou wu has many other health benefits: It supports healthy estrogen profiles in women, stimulates red blood cell production, builds your immune system, maintains healthy cholesterol levels, and improves intestinal regularity.
Color your hair naturally. If you want to dye your hair, use the following natural colorants: Henna works well for shades of light brown and red, coffee or black tea may be used by brunettes, and chamomile and lemon juice can color light hair.