I happen to be a registered dietitian and I control my weight easily on a whole foods, organic diet with very little animal protein. Most of my calories come from whole carbohydrates, such as whole grains, sweet potatoes, and small, colorful potatoes. I do believe that this is the diet nature intended for us. Getting too many calories from fat can put you in a state of ketosis, which is not a healthy state for your body to be in. My 2 cent.