Does Xylitol Prevent Cavities? The Facts You Need to KnowDental Tipsby Genesee Dental Group · published September 3, 2018Last updated July 6, 2018 · 4 min read · Xylitol makes many bold claims about its abilities. But are they myths or realities? Does xylitol prevent cavities? You’ll find out what causes cavities and the role this sugar alternative plays.