You're concerned about your weight gain over the holidays? Here is a list of 15 Negative calorie foods--that take more energy to digest than contained in the food item itself....
Celery
Oranges
Strawberries
Tangerines
Grapefruit
Carrots
Apricots
Lettuce
Tomatoes
Cucumbers
Watermelon
Cauliflower
Apples
Hot Chili Peppers
Zucchini
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