Yes, You Can Replace Regular Water With Seltzer Water
When it comes to hydration, the short answer is that seltzer water and flat water are equal, explains
Ron Maughan, PhD, professor in the school of medicine at St. Andrews University. A
2016 study authored by Dr. Maughan found that sparkling water and regular
water fall at the same point on a “beverage hydration index,” meaning the hydration effects will be exactly the same if the same volume of each liquid is consumed. However, there are some other factors that may affect seltzer’s hydration potential beyond just the beverage contents, he adds.