negative calorie foods are foods that require more energy to digest than is actually in the food itself for example if an apple had 60 calories and the body used 80 to digest it there would be negitive 20 cALORIES some negitve calorie foods are WATERMELON HONEYDEW MELON APPLES ORANGES LETTUCE CUCUMBER BROCCOLI ZUCCINI TOMATO MUSHROOMS AND PEACHES