Sleeping with your mouth open does more than just leave you with dry mouth—it's as damaging to your teeth as frequently drinking soda.
Saliva naturally protects your mouth and teeth. Mouth breathing at night reduces saliva production, shifting your mouth's pH balance and increasing risks of enamel erosion and decay.
A healthy mouth maintains a pH around 7.7. Research on mouth breathers shows levels dropping to 6.6, and in some cases as low as 3.6—comparable to the acidity after drinking fruit juice. This erodes tooth enamel over time.
Did you know? About 30 percent of men sleep with their mouths open, compared to just 5 percent of women.