Sparkling water has become a popular alternative to soda for people who want the fizz without the sugar. But if you’ve ever wondered whether those bubbles could be harmful to your teeth, new research offers some reassuring news.
A study presented by the American Society for Nutrition found that sparkling water caused considerably less enamel erosion than regular soda. While both types of sparkling water temporarily lowered salivary pH, the effect was short lived, with levels returning to normal within about 20 minutes.
The findings suggest that unsweetened sparkling water could be a lower risk option for people trying to replace sugary soft drinks. However, moderation and good oral hygiene still matter.
It temporarily changes your mouth’s acidity
One reason carbonated drinks have received scrutiny is their potential effect on the acidity of the mouth.
When salivary pH drops below about 5.5, tooth enamel can begin to dissolve. Soda can cause a substantial decline in mouth pH, increasing the conditions associated with enamel erosion.
Sparkling water can also lower salivary pH, but the new research found that the change was considerably less pronounced than the effect produced by regular soda.
That distinction may make unsweetened sparkling water a more appealing option for people who want to cut back on soft drinks without giving up carbonation.
Your saliva can recover relatively quickly
The study found that the acidity associated with sparkling water was temporary.
Researchers observed that both regular and calcium fortified caused a decline in salivary pH. In the tested beverages, however, pH returned to normal within approximately 20 minutes.
Calcium fortified sparkling water showed a noticeable change around the five minute mark before recovering.
That quick return toward normal conditions is important because prolonged exposure to acidic beverages can be more concerning for enamel than a brief change.
Soda had a stronger effect
The difference between soda and sparkling water was one of the most notable findings.
Researchers had 20 adults consume regular soda, regular sparkling water, calcium fortified sparkling water and still water. Each participant tried all four beverages, allowing the researchers to compare their effects.
Regular soda produced the lowest salivary pH among the beverages tested, indicating a more acidic environment in the mouth.
The results support the idea that replacing sugar sweetened soda with plain, unsweetened sparkling water could reduce exposure to conditions that contribute to enamel erosion.
Unsweetened varieties may be the better choice
Not all carbonated beverages are necessarily equal when it comes to dental health.
The study specifically points toward unsweetened sparkling water as a potentially lower risk alternative to soda. Removing added sugar is an important distinction because sugary drinks can contribute to tooth decay in addition to concerns about acidity.
If you’re choosing it, plain varieties without added sugar may therefore be the simplest option.
That doesn’t mean every flavored or carbonated beverage should automatically be considered harmful, but checking the label can help you understand what you’re drinking.
How often you drink it matters
The researchers noted that factors such as consumption frequency, duration and sugar content can influence how beverages affect teeth.
Even a relatively tooth friendly drink can become part of a less healthy routine if you’re constantly sipping it throughout the day.
Instead of keeping a carbonated drink beside you for hours, consider drinking it during a meal or in a shorter period. This can reduce the amount of time your teeth are exposed to changes in acidity.
Good oral care still matters
Sparkling water isn’t a replacement for basic dental care.
The researchers emphasized that unsweetened sparkling water may be a lower risk alternative to soda when consumed in moderation and alongside good oral hygiene practices.
That means continuing to brush your teeth regularly, clean between your teeth and maintain routine dental visits.
If you’re concerned about enamel erosion, tooth sensitivity or changes in your teeth, a dentist can also help determine whether your beverage habits may be contributing to the problem.
The bottom line
If you love fizzy drinks but want to make a more tooth conscious choice, unsweetened sparkling water may be worth considering. New research found that it temporarily lowers salivary pH but has a substantially smaller effect than regular soda, with mouth acidity returning to normal within about 20 minutes.
The study was relatively small, involving just 20 adults, so more research is needed to understand how different sparkling waters and long term drinking habits affect dental health.
Still, the findings offer encouraging news for people trying to move away from sugary soft drinks. Choosing plain sparkling water, limiting prolonged sipping and maintaining good oral hygiene can help you enjoy the bubbles while being more mindful of your smile.
