The Signs of Your Health in Your Hair and Scalp

 9.A Hair- and Heart-Healthy Diet
Help keep hair shiny by eating salmon and walnuts for omega-3 fatty acids; spinach and carrots for vitamin A; brazil nuts for selenium; and oysters and cashews for zinc. All help maintain scalp and hair health, as do low-fat dairy, whole grains, and vegetables. Double the results: Foods good for your hair are also good for your heart.

10.Premature Gray Hair Is Genetic
Going gray isn’t always related to aging. If you’re not yet 40 and see more than a few gray hairs, chances are it runs in your family. Gray usually isn’t a sign of poor health, though anemia, thyroid issues, vitamin B12 deficiency, and vitiligo can cause premature graying. You can highlight or color hair to cover the gray, but beware: Some people are sensitive to the chemicals in dyes. The result could be an itchy, burning scalp.