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Is Seltzer The New Diet Soda? And Is It Bad For Teeth?

Is Seltzer The New Diet Soda? And Is It Bad For Teeth?
by Tammy Adams

Dentists know to warn their patients about the perils of too much sugar in the form of sodas, juices and other sugary drinks. But is it time to steer them away from seltzer water, too?

The wildly popular La Croix has made its way into the hearts and hands of nutrition-minded people across the nation. Unflavored, tangerine, coconut, grapefruit, kiwi, lime — the bubbly water in a can contains no sugar, no artificial sweeteners, no sodium and can be guzzled guilt-free.

Or can it? (Record scratch.)

Dental professor Dr. Mark Wolff, chair of the Department of Cariology and Comprehensive Care at New York University's College of Dentistry, has this to say: "Be strategic with your La Croix obsession."

Buzzkill, Dr. Wolff.

Manufacturers add pressurized carbon dioxide to produce the carbonation, which is basically the process that makes those beloved seltzers bubbly and fizzy. This instantly makes the drink acidic, and that acid can cause the tooth's enamel to erode over time.

But in fairness to our much-loved La Croix, it's not just seltzers that do this. Acid in any drink can cause tooth enamel erosion, whether it comes from seltzer, flavored sparkling water, diet or regular soda. Fruit juices, wine and coffee are all acidic, too, Wolff said.

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