How much carbonated water is too much?

I drink about 4 - 5 S. Pelligrinos per day. No ill effects so far.

Here is a website that claims sparkling water can be bad for your teeth:

And more specifically, an excerpt:

In other words, sparkling water can erode your tooth enamel. It’s probably not something you need to worry about though, unless you drink carbonated water several times per day. Our saliva can repair the enamel through a process called re-mineralization as long as your teeth aren’t being bathed in the acid constantly.

It’s not the things she knows that I’d be concerned about, it’s the things she knows that aren’t so.

Not really. When you dissolve carbon dioxide in water, it produces a small amount of carbonic acid. This is part of what gives carbonated water its flavor.

But carbonic acid’s a relatively weak acid. It’s weaker than the phosphoric acid which is often added to other soft drinks.

I admit that I was a bit surprised that the pH of carbonated water is so low. Comparing with many other drinks listed on their linked site ( http://www.oralanswers.com/nine-drinks-that-can-dissolve-your-teeth/ )carbonated water seems about average or slightly better than most popular drinks. But nothing beats water, I guess.

On a television program I saw about surgery to reduce stomach volume and help with morbid obesity, a doctor told a patient not to drink any carbonated beverages because the gas distends and stretches the stomach over time, somewhat undoing what the surgery accomplished.

Perhaps on people who have not had the surgery, there can still be a stretching effect, and perhaps this even contributes to overeating because the stretched stomach takes more food to fill. Just an idea, though.

Ok then. Other than drinking a can of LaCroix amounting to dropping some weak acid, it is okay in limited doses, yet inferior to ordinary, or “still”, water.