The gastrointestinal tract is a long muscular tube that functions as the food processor for the human body.The digestive system includes the following organs: the mouth and salivary glands, stomach, the small and large intestines, colon, liver, pancreas, and the gall bladder. The gastrointestinal tract is not a passive system; rather, it has the capability to sense and react to the materials that are passed through it. For a healthy digestive system, every person requires different food selections that match their gastrointestinal tract capacity. The aging process and certain health issues cause a reduction in the body's enzyme production. One effect of this reduction is a bloated feeling soon after eating a large meal. Enzymes are essential to the body's absorption and full use of food. The primary digestive enzymes are proteases (to digest protein), amylases (to digest carbohydrate), and lipases (to digest fat). These enzymes function as a biological catalyst to help break down food. Raw foods also provide enzymes that naturally break down food for proper absorption