It’s a common assumption that still water is more hydrating than sparkling water, but dietitians say that’s not entirely accurate.

Is Sparkling or Still Water More Hydrating?

“Research shows that sparkling and still water hydrate the body equally, with no significant difference in fluid retention or urine output,” said Callie Krajcir, RD , a registered dietitian specializing in bladder health based in Breinigsville, Pennsylvania. “I usually tell people to choose the option they enjoy and will drink more of.”

In other words, whether you prefer your water flat or fizzy, both will keep your hydration levels topped off as long as you’re drinking enough water per day , which is about 11.5 to 15.5 cups, depending on personal factors.

“Sparkling waters can provide hydration for those

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