What is a Paleo Diet? A Paleo diet, also known as paleolithic diet or caveman diet, is all about natural foods to help achieve great health and a perfect physique. The human body evolved for more than 2 million years with the food found in nature: game meat, fish, vegetables, wild fruits, eggs and nuts. The human race was thriving on this diet high in animal fat and proteins and low in carbohydrates, but things changed when we introduced unnatural foods to our bodies. I'm actually reading a book about Paleot diet. I'm at the middle of the book and already there is much truth in it! When I'll finish the book I'll let you know about my opinion!