Recent studies and expert reports from July 2026 indicate that sparkling water may erode tooth enamel due to its acidic nature [2, 3].
This debate matters for millions of consumers who have switched from sugar-sweetened sodas to carbonated water as a perceived health alternative. If sparkling water significantly damages teeth, the perceived benefit of the switch may be partially offset by enamel loss.
The central issue is the pH level of the beverage. Carbonation lowers the pH in the mouth, which creates an acidic environment [1, 5]. This acidity can demineralise enamel, the hard protective outer layer of the teeth [1, 3]. Some health experts said sparkling water is far more acidic than tap water and can cause erosion [1].
However, other researchers suggest the risk is lower than previously thought. Some findings indicate that unsweetened sparkling water may be kinder to teeth than sugar-sweetened soda [2]. This is because unsweetened versions lack the sugars that further promote tooth decay [5].
Experts in the U.S. and New Zealand remain divided on the severity of the risk [1, 3]. While some said the main health risk of sparkling water is dental erosion [3], others said it remains a safer option than traditional soft drinks [2, 4].
Dental professionals generally recommend moderation. Those who consume carbonated water frequently may want to monitor their dental health, especially if they experience sensitivity, to ensure the acidity is not compromising their enamel [1, 3].
“Carbonation lowers the pH in the mouth, creating an acidic environment that can demineralise enamel.”
The conflicting data suggests that while sparkling water is likely less damaging than sugary sodas, it is not as neutral as still water. The dental risk is primarily chemical rather than bacterial, meaning the danger comes from the acid itself rather than sugar-feeding bacteria.
