Consuming too much xylitol gives me a stomach ache. I tried adding it to water for dental health on multiple occasions and got a stomach ache each time.
Yeah you don't want to consume a lot of it without easing into it. I have been using it for only about a week now and use it as a mouth wash after each meal and my teeth have gotten noticeably whiter. You will get diarrhea if you don't ease into consuming it because it is increasing the production of butyrate which is the mucus that lines yours intestines. If it is also killing off gram negative bacteria as studies claim, you may have some stomach irritability as those bacteria die off initially. I'm surprised xylitol isn't more ubiquitous given the research surrounding it.