The mouth is the beginning of the digestive system, and, in fact, digestion starts here before you even take the first bite of a meal. Once you start chewing and breaking the food down into pieces small enough to be digested. More saliva is produced to begin the process of breaking down food into a form your body can absorb and use. In addition, "juice" are produced that will help to further break down food. Chew your food more -- it helps with your digestion