You may have heard a simple formula: Take a low-calorie food, do some chewing, and you wind up burning more calories than you take in. But negative-calorie foods are, in fact, just a myth, according to nutritionist Sharon Richter, RD. A study in the New England Journal of Medicine found that chewing gum burns about 11 calories an hour — and it definitely doesn’t take an hour to chew that celery stalk. The math doesn’t add up.
If you’re aiming to trim your calorie consumption, choosing some low-calorie veggies is a smart move, but celery, cucumbers and the like shouldn’t comprise your entire diet. “They should be part of a well-rounded diet with plenty of other kinds of fruits and vegetables to ensure you’re getting a range of vitamins, minerals, and other nutrients your body needs,” says Richter.
Sharon Richter is a registered dietitian with a private nutrition practice in New York City.
References
Academy of Nutrition and Dietetics. (2021). "Negative-calorie foods" still count.
Levine, J., et al. (1999). The energy expended in chewing gum. The New England Journal of Medicine.
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