Carbonated water can temporarily increase acidity in the mouth, but sweetened carbonated drinks have a much stronger effect. Switching from sugary beverages to still water may help protect tooth enamel.

The Impact of Beverages on Oral Acidity

Preliminary studies indicate that still water is less harmful to teeth compared to sweet sodas. In one experiment, researchers compared the effects of various popular drinks on the acidity levels in the mouth.

Tooth enamel begins to erode when the pH in the mouth drops below approximately 5.5. Recent data suggest that carbonated water can briefly lower pH, but this effect is milder than that of sweet sodas. Many people replace soda with sparkling water, and research shows that, when consumed in moderation and with good oral hygiene, still water is a safer alternative.

Study Design

It is well established that sweet sodas contribute to tooth decay by lowering pH below critical levels. Less is known about the effects of still water. To investigate, researchers tested sweet soda, regular sparkling water, calcium-enriched sparkling water, and still water on a group of 20 adults. Each participant tried all the drinks, which helped minimize the impact of individual differences.

The study measured saliva pH, not just the acidity of the drinks themselves. This approach allowed researchers to assess the immediate reaction in the mouth after each beverage and gain a more realistic understanding of potential oral health effects.

Experimental Results

Among the tested drinks, sweet soda caused the greatest increase in oral acidity. Saliva pH was significantly lower after consuming soda compared to water, both two and twenty minutes later.

Regular still water caused a brief drop in saliva pH after two minutes, while calcium-enriched water did so after five minutes. In both cases, pH nearly returned to baseline after twenty minutes. Saliva also helped restore normal acidity after drinking soda or sparkling water. In the short term, pH remained above the threshold associated with enamel damage.

Additional Factors

The experiment only assessed short-term changes in saliva pH. In everyday life, the risk of tooth decay also depends on how often a drink is consumed, how long it stays in contact with teeth, and whether it contains sugar.

Conclusions and Future Research

The results suggest that replacing sweet sodas with still water can reduce the risk of enamel erosion. Beverage manufacturers might consider adjusting their formulas to lower the erosive potential of acidic drinks. Future studies aim to examine the long-term effects of carbonated water on oral health and determine whether it influences other factors that support healthy teeth and gums.

It is important to note that these findings are preliminary and require confirmation in peer-reviewed scientific publications.