The benefits of chewing gum include the protection of teeth and the promotion of gastrointestinal motility. 1. Protect teeth: chewing gum can stick to the food debris, so as to achieve the role of cleaning up the oral cavity; chewing gum to make the salivary glands secretion, improve the pH value of the oral cavity, to prevent the decalcification of the teeth of the acid produced by putrefaction; at the same time containing xylitol gum can inhibit the reproduction of “Streptococcus mutans”, to prevent tooth decay. 2. Promote gastrointestinal peristalsis: chewing gum can promote gastrointestinal reflexes, leading to an increase in gastrointestinal peristalsis, which can help improve the symptoms of indigestion. But chewing gum also has some disadvantages, such as leading to bite muscle hypertrophy, so chewing gum should be moderate, not more than 20 minutes.