Frequent consumption of carbonated water can erode tooth enamel due to the beverage's acidic nature [1, 2, 4].
This health concern affects millions of consumers who view sparkling water as a healthy alternative to sugary sodas. Because the damage occurs gradually, many users are unaware that their choice of hydration may be compromising their long-term dental health.
The erosion process begins when carbon dioxide dissolves into water to create carbonic acid [3]. This chemical reaction lowers the pH level of the drink. According to Dr. Michael Glick of Columbia University, carbonated water typically has a pH of around 3.5 [1]. This value is significantly lower than the critical enamel demineralization threshold of 5.5 [1].
When the pH in the mouth drops below that critical threshold, the hard outer layer of the teeth begins to dissolve [1]. Some reports indicate that exposure to sparkling water for five minutes can result in an average enamel loss of 0.01 mm [2]. The risk may increase further with flavored varieties, which often contain citric acid [2, 3].
Experts suggest that the timing of oral care is critical to preventing further wear. Dr. Sarah Patel, a dentist in Newcastle, said that regular consumption can wear away enamel if users do not rinse or wait before brushing [2]. She said that users should wait at least 30 minutes after drinking before brushing the teeth to avoid accelerating enamel wear [2].
Public habits reflect the popularity of these drinks, with 30% of adults reporting that they drink sparkling water daily [5]. While some sources suggest sparkling water is a harmless alternative to soda [5], dental professionals emphasize that the acidity remains a factor in enamel degradation [1].
Anistacia Barber, a water-sommelière, said the carbonation process simply dissolves CO₂ into water, creating carbonic acid, which is mildly acidic [3].
“Carbonated water has a pH of around 3.5, which is well below the critical pH of 5.5 where enamel starts to dissolve.”
While sparkling water lacks the sugar found in soft drinks, its inherent acidity presents a different risk to oral health. The gap between the pH of carbonated water and the enamel's stability threshold suggests that frequent drinkers may experience gradual tooth wear. This highlights a tension between metabolic health goals, such as reducing sugar, and the preservation of dental minerals.
