Running, gave the same 20 adults four beverages: sugar-sweetened soda, regular unsweetened sparkling water, calcium-fortified sparkling water, and plain water. Plain sparkling water caused a temporary dip at 2 minutes. Zulfiqar said unsweetened sparkling water "may be a lower-risk alternative to soda" when consumed in moderation alongside good oral hygiene. The Purdue design tested the two gentlest members of the sparkling water family and left out the flavored products that dominate supermarket shelves. Should anyone stop drinking sparkling water based on this?