Is sparkling water bad for your teeth?
Last updated September 3, 2026.
Plain sparkling water, no: carbonation briefly lowers mouth acidity, but a salivary-pH study found the dip stays above the level where enamel dissolves (pH 5.5) and saliva restores balance on its own. Soda causes a far stronger, sustained drop - so sparkling water is a genuinely tooth-friendlier swap. The real caveat is flavor: a study of flavoured sparkling waters found true erosive potential from the added acids, not the bubbles. Pymander's escalation routing is built and tested specifically for this class of decision; see the safety architecture working paper.
What to do
- Plain is fine: unsweetened sparkling water hydrates like still water and beats soda for enamel.
- Watch the flavored ones: citrus-flavored versions carry real acid - drink with meals, not all day.
- Keep some tap water: fluoridated tap water still does anti-cavity work sparkling water cannot.
- Get seen if: cold drinks hurt a specific tooth - sensitivity in one spot is a cavity question, not a beverage one.
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