Any non-acidic liquid will help reduce acid-related upset stomach. Water works, but I'd assume the constant increase in gum probably has a longer effect than th

Any non-acidic liquid will help reduce acid-related upset stomach. Water works, but I'd assume the constant increase in gum probably has a longer effect than the temporary effect you get from a sip of water. I've never heard of saliva doing anything more than diluting your stomach acid, but I've never really tried to find if it does or doesn't. So I'll leave that for another commenter.