While sugars promote and feed the growth of oral yeast infections and thrush, it has been suggested in many studies that sugar-free Xylitol may actually have anti-fungal properties, thereby reducing both the incidence and severity of thrush. It is also renowned to have a pre-biotic effect on the digestive system, promoting the growth of good bacteria. As with all medical problems and for those following strict meal plans, however, please consult your health practitioner for more information.