Have you ever wondered if carbonated water was bad for your health? I've heard both sides, that it's good for dieting because it can help you feel fuller, and that it might have negative side-effects due to acidity and lack of fluoride. So is it or isn't it a bad idea? Honestly, there haven't been enough studies looking at just water (as opposed to other carbonated beverages) to really know for sure, but experts say that all arrows point to a very small risk, if any, for negative health effects. A bigger risk? Not drinking enough water of any kind, period.