Calcium is essential to maintaining total body health; it keeps bones and teeth strong and ensures proper functioning of muscles and nerves. When blood calcium levels drop too low, the vital mineral is "borrowed" from the bones.

Carbohydrates provide energy for your body; they are converted into glucose, which is used by the muscles and brain. Carbohydrates come in two forms, simple (like those found in fruit) and complex (present in most grain products and some vegetables).