Wrigley's Orbit Spearmint Sugarfree Gum. Artificially flavored. 40% fewer calories than sugared gum. Calorie content of this size piece has been reduced from 5 to 3 calories. The ADA council on scientific affairs' acceptance of Wrigley's Orbit sugar free gum is based on its finding that the physical action of chewing Wrigley's Orbit sugarfree gum for 20 minutes after eating stimulates saliva flow, which helps to prevent cavities by reducing plaque acids and strengthening teeth. ADA Accepted American Dental Association®. Questions Comments Call 1-800-WRIGLEY (1-800-974-4539).