Artificially flavored. Long lasting fruit flavor. Accepted by the American Dental Association. 35% fewer calories than sugared gum. Calorie content of this size piece has been reduced from 8 to 5 calories. Helps fight cavities by strengthening teeth. The ADA Council on Scientific Affairs' Acceptance of Extra is based on its finding that the physical action of chewing Extra sugar-free gum for 20 minutes after eating, stimulates saliva flow, which helps to prevent cavities by reducing plaque acids and strengthening teeth.