Sparkling water has all the bubbly and none of the sugar of soda. But is there a downside?
“Sparkling water is made by pumping carbon dioxide into water,” explains John Ruby, a retired professor of pediatric dentistry at the University of Alabama, Birmingham. “The CO2 turns into carbonic acid, and the pH drops.”
A lower pH means that the liquid has become more acidic. (Pure water has a neutral pH of 7 on the 0-to-14 pH scale.)