Zinc deficiency is a serious problem in many developing countries and can stunt growth and impair cognitive function. It can also lead to macular degeneration and nerve damage. Be sure you're getting enough zinc by eating oysters, spinach, cashew nuts, dark chocolate, mushrooms, pumpkin seeds and lean beef and lamb.
Of course, taking a multivitamin will help for when life gets a little too frantic and you just don't have the time to eat all the foods that contain these vital nutrients. How do you ensure you don't miss out on vital nutrients?