If you are very frequent with eating something, though it may be a candy or a chewing gum then go for a sugar-free chewing gum. According to a research chewing sugar-free gum after lunch may reduce the risk of the cavity in your mouth as chewing gum activates saliva in your mouth which removes the material that causes tooth decay in your mouth, moreover, increased saliva produces calcium and phosphate which makes your enamel stronger. Moreover, chewing gum also gives a fresh smelling breath.