The following foods are allowed in a clear liquid diet: Water (plain, carbonated or flavored) Fruit juices without pulp, such as apple or white grape. Fruit-flavored beverages, such as fruit punch or lemonade. Carbonated drinks, including dark sodas (cola and root beer) Gelatin.
Your body has a mechanism and set of enzymes for digesting the carbs, protein and fat molecules in your food. Chemical digestion occurs in several steps beginning in the mouth and ending with absorption in the small intestinal cells.
Page 4: Carbohydrate digestion begins in the mouth. â¢ Plant starch and glycogen are long polymers of glucose; they are. abundant in the diet. â¢ Chemical digestion of starch begins in the mouth with the enzyme, salivary amylase (optimal pH ~ 7).