“Negative-calorie” foods are said to require more energy to chew and digest than they provide when eaten. Foods that have been given this label are usually fruits and vegetables with high fiber and water content, like celery, lettuce, tomatoes, and carrots. Proponents state that eating negative-calorie foods creates a calorie deficit, and thus you can achieve weight loss by consuming more negative-calorie foods. The truth is: there is no such thing as a negative-calorie food. All foods contain calories and their consumption results in a net energy gain.
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