Why is chewing gum bad for my teeth?

Is may not be: Sugar can be bad for the teeth if overused. Gums that contain sugar can lead to dental caries.

It's Usually Not: If you have healthy teeth, healthy gums, and healthy jaw joints and muscles, chewing gum is usuall fine. In fact, sugarless gum or a variety with xyletol as a sweetener can actually be beneficial to your oral health. Chewing gum also stimulates saliva, which can dilute oral acids and help to protect your teeth from cavities. Your dentist can tell you much more about it.