The revolutionary negative calorie diet uses your own digestive system as a dieting tool. It is based on the simple fact that the digestive process takes up to 12 hours, and like all body activity, it BURNS calories. Scientific research for the Negative calorie Diet has identified more than 100 foods that require your body to burn more calories processing these foods through your digestive system than the actual calorie content of the food itself. This results in your body burning stored fat!