Dr. Lee to Sara: "Have you ever wondered why your mouth makes spit? It is very important for healthy teeth."
The liquid in your mouth is called saliva, or spit. Healthy saliva is pH neutral or slightly alkaline. pH is a term used to indicate acid or alkaline, 7 is neutral, below 7 is acid and above 7 is alkaline. Saliva has five major functions:
The amount of protective saliva in the mouth decreases at night, which makes brushing well before bed especially important.