negative calories

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There is a theory that the process of eating some foods, such as celery, uses more energy than the food contains. Such foods are said to have negative calories. It is true that these foods have few calories (mainly because of their high water content), and that there is an energy cost to chewing and digestion. However, the amounts of energy involved are very small and have no significant effect on weight control or loss.

Subjects: Medicine and Health.

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