While sugared chewing gum is bad for both health and teeth, sugar-free chewing gum has been shown to help clean teeth, reduce appetite and even stimulate brain activity. Chewing sugar-free gum causes the mouth to salivate which helps clean teeth, and stimulating the jaw muscles through chewing helps blood flow to the brain.
Sugary gum corrodes teeth more than chewing gum helps the teeth. That being said, chewing sugar-free gum benefits the teeth by breaking off plaque and creating saliva to neutralize plaque acid. A study done by Louisiana State University suggests that chewing gum suppresses the appetite, which means chewing gum can help reduce caloric intake. Finally, Scientific American suggests that chewing gum stimulates the brain, which helps with focus and problem solving.