Is Saliva The New Lube? Ask. Dr. Lia Increases risk of sexually transmitted infections Why you should not use saliva as a lubricant during sex Saliva isn't just for digestion. It contains enzymes, antimicrobial compounds, and growth factors that help the body repair itself. But it's not sterile and should never replace proper wound care. Follow @ultimatefacts199 See what using saliva as sexual lubricant can cause The Surprising Benefits of Saliva for Oral Health 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