There are moments when a waiter walks by you with a steaming hot Italian pizza while waiting for food at a restaurant and your mouth starts watering. But why is this happening? What makes the ‘mouth-watering’ expression so precise? Science has a response.
First, knowing exactly what saliva does is crucial. As it is step one in breaking down foods, it plays a significant role in the digestion process. 99.5 percent water and 0.5 percent proteins, lipids, and electrolytes make up the saliva.