The taking in and use of food and other nourishing material by the body.
Nutrition is a 3-part process. First, food or drink is consumed. Second, the
body breaks down the food or drink into nutrients. Third, the nutrients travel
through the bloodstream to different parts of the body where they are used as
"fuel" and for many other purposes. To give the body proper nutrition, a
person has to eat and drink enough of the foods that contain key nutrients.