when i am working,reading or doing any kind of work i have this habit of ruminating like a cow . now come on i am not serious ,i mean i like chewing gum.and it can be any kind of flavor but if it is watermelon that i like the most.my mother said that even after chewing gums ,my teeth still has a yellowish texture to it ? so now she decided and gave me Xylitol Gum and told me to chew it. what is the role of the Xylitol Gum in reducing teeth decay?will it convert the yellow to pearly white? and how long do i need to chew .also is it tasteless or have a nice flavor it? i wonder how they make such a gum that can taste well as remove the tooth decay!.