PoshanSenseIs sparkling water bad for your teeth? Plain fizz and acidic flavours are different.
What an orthodontic enamel experiment can—and cannot—tell us about everyday sparkling water, with current dental guidance on flavouring, sugar and sipping.
Research explained · Published 2017
There is a big difference between “this drink is slightly acidic” and “this drink is ruining your teeth”. Sparkling water headlines often jump straight between the two. The useful answer depends on what is in the bottle and how you drink it.
Start by separating plain unsweetened sparkling water from sweetened fizzy drinks and citrus-acid flavoured products. Bubbles are only one feature. Added sugar and added acids can create different concerns.
Why one lab experiment sounds alarming
A 2017 Korean experiment found enamel changes after tooth specimens were immersed in carbonated water. But the tested surfaces had been deliberately etched with phosphoric acid, and some were covered with a bonding primer. This was designed around orthodontic bonding, not an ordinary intact tooth.
The researchers compared different carbonation levels and added calcium. Higher-carbonation conditions produced larger microhardness changes in some comparisons. One low-carbonation condition with calcium did not clearly differ from the control on that measure. Microscopy also showed changes to etched surfaces and bonding material.
That finding is relevant to a laboratory question about prepared enamel. It is not a clinical estimate of how many cavities or worn teeth will occur among people drinking a glass of plain sparkling water with dinner.
Is sparkling water bad for your teeth? Plain fizz and acidic flavours are different.
Plain or flavoured?
Added acids and sugar change the question.
75 extracted teeth
An orthodontic laboratory model, not 75 drinkers.
Living mouths differ
Saliva and intact enamel matter.
Avoid constant sipping
Dental guidance favours limiting repeated acidic exposure.
Why your mouth is not the lab container
The specimens were exposed for repeated 15-minute periods over seven days. Between exposures they sat in artificial saliva, deliberately formulated without calcium to isolate the role of calcium in the test drinks. Real saliva provides buffering and protective processes that this setup could not fully reproduce.
Previous exposure of the donated teeth, individual saliva flow, biofilms and drinking patterns also matter. The authors acknowledge these limitations and call for testing in living mouths. Their broad conclusion about harm should therefore not be lifted out of the experimental context.
Tooth erosion and tooth decay are also different processes. Erosion involves acid-related loss of tooth material. Decay involves bacterial processes, with sugars relevant to the bacteria. A sugar-free acidic drink and a sugary drink can pose different combinations of risks.
What current dental guidance says
The American Dental Association’s consumer guidance says plain sparkling water is generally fine for teeth and is preferable to sugary drinks. It still recommends regular fluoridated water and warns that citrus flavouring and added sugar change the picture. This is professional guidance, separate from the specific orthodontic laboratory experiment.
Check ingredients rather than assuming “water” means identical formulations. Citrus acids may be added even when a drink contains no sugar. Sweetened sparkling products should be considered sugary drinks for this purpose. The colour of the can or the word “natural” does not measure acid exposure.
For acidic flavoured drinks, having them with a meal or in one sitting limits repeated exposure compared with sipping all day. Plain still water can remain your easy default. You do not need to search for a special mineral mix based on one laboratory calcium comparison.
What if you have braces or sensitive teeth?
If you have braces, ongoing erosion, dry mouth or tooth sensitivity, ask your dentist about your own drinks and pattern of use. The lab model gives a reason to consider prepared tooth surfaces carefully, but cannot tell a particular person what will happen to their appliance.
Do not assume that avoiding sparkling water solves every dental problem. Regular dental care and the overall pattern of acidic and sugary foods still matter. This article does not diagnose the cause of sensitivity or establish that a particular product is safe for every mouth.
The experiment was supported by Wonkwang University and declared no commercial or financial interest in the products studied. That transparency helps assessment, while the laboratory limitations remain central.
The useful takeaway is a distinction: plain fizz can fit ordinary drinking habits, while added acids, sugar and constant sipping deserve separate attention. A headline about a tooth prepared for bonding should not become a blanket rule for every glass of water.
Sources & further reading
Study years differ from this article’s publication date. We reviewed full primary papers and relevant supporting material; access limitations are kept out of efficacy claims. Original illustrations and diagrams; no publisher figures reproduced. Educational writing, not clinical review.
Published 11 October 2026 · Sources checked 11 October 2026. Suggest a correction.