High fat foods are more calorie dense than either high carb or high protein foods. As an aside, homemade pizza dough is typically very low in fat, so it is usually the toppings that add the fat in homemade pizza, which, by the way, I have found is not that hard or time consuming to make. Pizza crust is most often made of refined flour which may be why those doing a 180 on diet may be a fan of recommending pizza. Refined foods are easier to digest and so are more warming…. Also pizza can be very tasty and is often eaten in a social/good time setting – all conducive things to recovery and healing.