Did you know chewing gum ( sugar free) helps to clean your teeth after meals? Chewing gum can help prevent tooth decay, as long as you choose a sugarless gum. Chewing gum causes your mouth to produce more saliva, which helps neutralize and rinse away some of the acid that forms in your mouth when you break down food. So, if you chew gum after a meal, you may be helping to protect your teeth and promote oral health.