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Whether you get fix via store-bought cans or a DIY SodaStream, there's no denying that sparkling water makes hydrating a little bit more fun. For the most part, that's great news: Most flavored seltzers are made without sweeteners (real or artificial) and naturally contain zero calories, so they're a great swap for soda when you're craving bubbles. But, do these bubbles cause inconvenient side effects like belching or bloating? We asked a gastroenterologist to explain why this might happen, and what you can do it avoid it.