Negative Calorie Foods

Negative Calorie Foods ~ Vegetables
Asparagus beets broccoli cabbage (green)carrots cauliflower celery chicory chili peppers cucumbers garlic lettuce onions papayas spinach turnip zucchini

Negative Calorie Foods ~ Fruit
Apples cranberries grapefruit lemons mango's oranges pineapple raspberries strawberries tangerines

All foods have some calories. No food is actually "negative calorie" food. The overall effect of certain foods in our body is that of "negative calories". Negative calorie foods are foods, which use more calories to digest than the calories the foods actually contain!

Calories from these foods are much harder for the body to breakdown and process. In other words, the body has to work harder in order to extract calories from these foods. This gives these foods a tremendous natural fat-burning advantage.

A meal consisting of 500 calories may require only 150 calories to be digested by our body, resulting in a net gain of 350 calories which is added to our body fat! According to this theory, for example, if you eat 150 calories of a food that requires 200 calories to digest, then you've burnt an additional 50 calories simply by eating that food.
More info: http://weightlossinternational.com/newsletter/free-list-of-negative-calorie-foods.html