Is sparkling water bad? Myths and truths you should know
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Sparkling water has earned a place in Spanish kitchens, but it also carries a few myths: that it erodes enamel, that it decalcifies bones, that it hydrates less… Before putting the bottle (or your sparkling water maker) aside, it's worth separating what science says from what is repeated by habit.
We have gathered the most common questions and answer them clearly. Spoiler: for the vast majority of healthy people, sparkling water is simply water with bubbles. Still, here are the details question by question.
Is sparkling water bad for your health?
Generally, no. Sparkling water is water to which carbon dioxide (CO₂) has been added, forming small amounts of carbonic acid responsible for the bubbles and that characteristic acidic taste. It contains no sugar, no calories, and no sweeteners when you make it at home with just water and CO₂.
Nutritionist Boticaria García summarized it bluntly in a recent interview: sparkling water "has nothing wrong with it." The health problem we usually associate with bubbly drinks almost always comes from the sugar in sodas, not from the carbonation itself.
As with any food or drink, the key is your overall diet. If you have a specific medical condition, it's best to consult your healthcare professional.
Does sparkling water damage tooth enamel?
This is one of the most widespread myths. Sparkling water has a slightly lower pH than still water due to carbonic acid, but it is not acidic enough to cause significant enamel damage in a person with normal dental health.
What truly erodes enamel and causes cavities is the sugar and added acids in many soft drinks and juices, not the bubbles. Natural sparkling water, without added sugars or acidic flavorings, is a much gentler option for your teeth than a sugary soda.
If you want to be extra careful, a couple of simple actions help: drink sparkling water with meals and avoid holding it in your mouth for too long. And if you add lemon or lime, keep in mind that the extra acid comes from the fruit, not the gas.
Does sparkling water decalcify or damage bones?
No. This myth originated from old studies on cola drinks, which were indeed associated with lower bone density. But the "culprit" was not the bubbles, but other components of those drinks, such as phosphoric acid and caffeine, in addition to the fact that those who drank a lot of sodas usually consumed less milk and other calcium sources.
Sparkling water does not contain phosphoric acid or caffeine, so that reasoning does not apply. In fact, some natural sparkling waters provide minerals, and some preliminary studies (including some animal studies) suggest that carbonation does not harm bones. The evidence is still limited and does not allow for promises of benefits, but it does debunk the idea that sparkling water "decalcifies."
Does sparkling water hydrate as well as regular water?
Yes. Sparkling water is, in essence, water, and it performs exactly the same hydration function as still water. The presence of CO₂ does not reduce its ability to replenish fluids in the body.
For many people, the bubbles also make drinking water more appealing, which can help reach the amount of liquids you need throughout the day, especially in the warmer months.
Does sparkling water help or hinder digestion?
It depends on each person, and individual sensations are key here. Some research suggests that sparkling water can have a favorable effect on digestion: it would stimulate the production of gastric juices and could help relieve feelings of heavy digestion or mild constipation in some people.
On the other hand, if you are prone to bloating, gas, or reflux, you might find the bubbles make you feel worse and notice more abdominal distension. It's not that it's "bad," it's just that your body may tolerate it better or worse. Listen to your body: if it feels good, go ahead; if it causes bloating, reduce the amount or alternate with still water.
Does sparkling water make you gain weight or increase appetite?
Natural sparkling water, without sugar or sweeteners, has no calories, so it does not make you gain weight. It is an excellent alternative to soft drinks precisely for this reason.
Regarding appetite, the evidence is mixed and inconclusive: it has been speculated that bubbles could influence feelings of satiety or hunger, but there is no solid data to confirm this either way. What is certain is that replacing sugary drinks with sparkling water is a sensible decision for your diet.
Can I drink sparkling water every day?
For most healthy people, yes, completely normally. There is no reason to think that daily and reasonable consumption of sparkling water is harmful.
If you make your own sparkling water at home, you have an added advantage: you control the level of bubbles to your liking and ensure that you only drink water and CO₂, without sugars or additives. As always, if you have a particular digestive or medical condition, discuss it with your healthcare professional.
In summary
Most of the "dangers" of sparkling water are myths inherited from sugary soft drinks. Without sugar or additives, sparkling water hydrates just like regular water, does not significantly damage enamel, does not decalcify bones, and can even make the habit of drinking enough water more pleasant. The only real recommendation is the usual one: listen to your body and, for specific medical concerns, consult a professional.
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