This is the same diet that will produce a new, slimmer body. In order to see results you must limit carbohydrates completely for the initial phase, and only eat a fixed number of complex carbohydrates thereafter. Your job is to find that happy medium between your own carb intake level, along with the level the fact that your body enters ketosis. One gram of fats (9.4 calories) yields 8.9 calories of gasoline.