Role of Saliva in Digestion: Functions, Enzymes & Oral Health Importance Saliva plays a crucial role in digestion by initiating the breakdown of carbohydrates through salivary amylase, moistening and lubricating food Is Saliva Good Lubrication? Reasons to Avoid Using Spit as Lube Oral Lubrication, Xerostomia, and Advanced Macromolecular Lubricants for Treatment of Dry Mouth Lubrication of soft oral surfaces ScienceDirect Saliva is not lube. Especially not if you're trying to get pregnant! A healthy lube should be: pH balanced iso osmolar fragrance free non irritating Save this, and share it with your friends! #reproductivehealth #