I think with Xylitol, you have to be careful along with everything else. I don’t seem to react to it, but others do. Also, you need to make sure that your Xylitol is made straight from hardwoods. Some brands add stuff in, which you can see if you read the ingredients or look them up online. Also, for some people, Xylitol can have a laxative effect if too much is consumed.