Can chewing gum with sugar lead to weight gain?

The odds are no. The average stick of gum contains about 5 calories, (one can of coke has about 200) so unless you are eating 20 sticks a day, you end up burning those calories chewing gum long enough.
Not likely. You would really have to chew a lot of gum to get a lot of calories into your system to gain weight, but the added sugar is really harsh on your teeth. I guess you really could gain weight but it would be difficult.

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