Don’t let the name fool you, the contents of the food aren’t created of something like antimatter, which annihilate calories. Rather, they are filled with relatively less calories than it takes to consume them.
For instance, you eat a vegetable such as broccoli that contains 25 or so calories and your body naturally must expend about 80 calories in order to digest it. Simple math shows that more energy is used than received.
Apparently there is a new softdrink on the market called Celsius. Its creators claim that it not only fits this “negative calorie” paradigm, but that it also comes in three tasty flavors: cola, lemon & lime, and ginger ale.
Other foods that are considered to have “negative calories”:
Asparagus, Beets, Cabbage (green), Cauliflower, Clams, Celery root, Chile peppers, Cucumber, Dandelion, Carrots, Endive, Garden cress, Garlic, Papaya, Radishes, Spinach, Turnip, Zucchini, Cranberries, Apples, Oranges, Lettuce, Grapefruit, Pineapples, Tangerines, Strawberries, Raspberries, Onions.