The paleo diet is based on what the first humans (cavemans) probably ate: vegetables, fruits, meat, and nuts.
A Paleo diet cuts out processed foods, dairy products, grains, legumes, refined sugars, and vegetable oils in favor of unprocessed foods. The diet is high in fat, moderate in animal protein, and low to moderate in carbohydrates.
Many paleo eaters believe our modern eating habits and sedentary lifestyles are to blame for chronic diseases such as obesity, heart disease, and diabetes. Expert opinion is divided((Beneficial effects of a Paleolithic diet on cardiovascular risk factors in type 2 diabebtes: a randomized cross-over pilot study. Jonsson T, Granfeldt Y, Ahren B, et al. Department of Clinical Sciences, Lund, Lund University, Lund Sweeden. Cardiovascular Diabetology, 2009 Jul 16;8:35.))((Paleolithic diet improves glucose tolerance more than a Mediterranean-like diet in individuals with ischaemic heart disease. Lindberg S, Jonsson T, Granfeldt Y, et al. Department of Medicine, University of Lund, Lund, Sweeden. Diabetologia, 2007 Sep;50(9):1795-807.)). It’s also called the Paleolithic, Primal Blueprint, Caveman, Stone Age, or Hunter-Gatherer diet.