So what’s the alternative to the food pyramid? Enter the Paleo Diet! Nicknamed the Caveman Diet, the Paleo Diet gets rid of the Bread, Cereal, Rice, and Pasta group entirely! Supporters of this diet argue that grains are actually foods that humans have only been eating for a very short time: only a few thousand years, back when we started farming. And because these foods are so new, our bodies haven’t had time to fully adapt to them. In some ways, they are foreign substances.