There are more products on the market today which boast zero calories, and so it would seem that incorporating these products into healthy diets would make it much easier to lose weight. Unfortunately, it's not quite that simple because calories are the energy required by our bodies to operate properly.

Depriving yourself of too many calories on a daily basis will result in your metabolism slowing down to keep pace with the lower food intake. For this reason, you don't actually lose as much weight as you might assume when eating a lot of zero calorie foods, but you will feel sluggish and unhealthy. When you literally starve yourself of needed calories, you body slows down to burn fewer calories in response. A healthy diet will incorporate natural zero calorie foods and beverages like water, as well as negative calorie foods that take more energy to digest than they contain like fruits and vegetables.