In a nearly year-long study xylitol cut cavities in half. The natural sweetener is found in fresh blueberries, cranberries, mushrooms, lettuce and corn. Xylitol is also added to mouth rinse, sugarless gum and mints.
"Xylitol will stick to the teeth so bacteria will not adhere to the tooth. So it actually helps the cavity from being formed," said Dr. Nancy Rosen, dentist.
Still, dentists say nothing prevents caveats as well as brushing and flossing.
You can learn more about the study in the Archives of Pediatrics and Adolescent Medicine.