It will get shape used to eating fewer carbs; without taking the body by involving a shock. You lose nearly 30% in the energy when consuming protein, but only 7% from fat, and 2% from carbohydrates. Carb-ups should be low fat and 90% healthy carbohydrates like sweet potatoes and portion of oatmeal. For instance, are you lacking iron in much better as iron is a very important nutrient?