Can anyone summarize how much risk? I don't see that in the abstract. And how much amount of xylitol where it becomes a risk? (We all know, everything can kill

Can anyone summarize how much risk? I don't see that in the abstract. And how much amount of xylitol where it becomes a risk? (We all know, everything can kill you in the right volumes, even water, but there are also healthy volumes.) I go through a lot of chewing gum with xylitol.