A separate study published in the journal Appetite found that gum-chewers ate 36% fewer calories each time they snacked because their appetite had been sated. Chewing gum burns eleven extra calories per hour. That’s 19% more calories than just sitting in front of your computer screen.
While that doesn’t sound like a lot, if you chew for four hours daily it adds up to 4.5lbs per year. And that’s without counting the calorie savings from the snacks you're not eating.