Paleolithic eating or the 'caveman diet' as it is otherwise known mimicks the way our ancestors ate. It claims to help followers achieve optimal health, minimise the risk of chronic disease and lose weight. The Paleo diet is based on grass-fed meat, fish and seafood, eggs, and non-starchy fruits and vegetables. Nuts and oils such as olive, walnut, flaxseed, coconut, avocado and macadamia are also allowed. Grains, legumes, dairy, refined sugar and oils, and processed foods are not allowed.