Some people lose more importance on high protein diet than a high carb or high fat diet. It will take energy to digest sustenance. Consuming one gram of protein (5.65 calories) yields only iv.0 calories of energy. One gram of fats (9.4 calories) yields 8.9 calories of time. One gram of carbohydrates (4.1 calories) yields various.0 calories of energy. You lose nearly 30% within the energy when consuming protein, but only 7% from fat, and 2% from carbohydrates. This accounts around half the loss difference from people on a highly regarded carb as. low carb diet.