Saliva is a liquid made of water, mucus, proteins, minerals, and an enzyme called amylase. It’s made by the salivary glands, many small organs around the cheeks, lips, tongue, and other parts of the mouth. Tiny tubes called ducts carry the saliva from the glands into your mouth. Small amounts of saliva are sent into the mouth constantly, to keep the mouth moist. Then your glands make lots of saliva, and you can notice much more of it in your mouth.
In addition to keeping your mouth healthy, saliva may contain indicators of health concerns as well. Since it shares many properties with blood, the use of saliva to detect and diagnose oral diseases and other diseases that could affect your general health is being studied. Researchers have reported promising results in the use of saliva for the diagnosis of a variety of medical conditions.