Acidic beverages like soda break down the enamel of your teeth, leaving them vulnerable to decay. But like lemon water, seltzer isn’t acidic enough to cause erosion, explains Matthew Messina, DDS, Columbus, Ohio-based spokesperson for the American Dental Association. Regardless, since you create saliva and swallow throughout the night, remnants of the drink don’t linger in your mouth for long.
Plus, rather than sugar, flavored options typically contain ingredients such as sucralose and stevia, which don’t cause cavities, he adds.
The bottom line:
You can hydrate with seltzer between brushing your teeth and going to bed without risking dental damage. You should do a second cleaning if you’re drinking one that’s artificially colored, which may stain teeth over time, Messina notes.