Let the Pyramid guide your food choices
Different foods contain different nutrients and other healthful substances. No single food can supply all the nutrients in the amounts you need. For example, oranges provide vitamin C and folate but no vitamin B12; cheese provides calcium and vitamin B12; but no vitamin C.
To make sure you get all the nutrients and other substances you need for health, build a healthy base by using the Food Guide Pyramid as a starting point. Choose the recommended number of daily servings from each of the five major food groups. If you avoid all foods from any of the five food groups, seek guidance to help ensure that you get all the nutrients you need. How many servings do I need each day?
Food group Children ages 2 to 6 years, women, some older adults (about 1,600 calories) Older children, teen girls, active women, most men (about 2,200 calories) Teen boys, active men (about 2,800 calories)

More Nutrition Information Can Be Found Here