Negative Calorie Diet
The Negative Calorie Diets encourages dieters to eat and drink food products that have a negative caloric effect.
While there are multiple versions of this diet, they usually have people eating foods that are extremely low in calories. In fact, the calorie content is so low that more calories are burned in the digestive process than are gained from the foods being digested.
The negative calorie foods that are allowed in this diet include mainly vegetables and fruits such as: asparagus, beets, broccoli, green cabbage, carrots and cauliflower and apples, blueberries, cantaloupes, and cranberries respectively. The surplus of vitamins stored in these foods will create a reaction in your digestive process that is said to lead to weight loss.
The negative calorie diet does benefit the metabolism, but people should eat such foods as a snack and not base their diet completely on them. There is no scientific proof that this diet actually works. Negative calorie foods alone may not be enough to create permanent and satisfactory weight loss. Also, due to the lack of information in general regarding this diet, it seems to be more theoretical then practical.