Saliva is a colorless watery liquid which is always present in our mouth.neurodrol It contains enzymes which digest food. These enzymes in saliva convert insoluble starches into water-soluble substances.Actually this is the process of digestion. Enzymes convert many complex food substances into simpler substances which then can be absorbed by the body and used for its needs.These enzymes are made by different organs glands.http://www.healthsupreviews.com/neurodrol/