Loren Cordain is an American scientist who specializes in fields of nutrition and exercise physiology. He is notable as an advocate of the Paleolithic diet and a researcher into paleolithic nutrition; he wrote numerous peer-reviewed articles on the subject, as well as several popular books, most notably, The Paleo Diet. He has written that diet is the root of many modern health problems such as cardiovascular disease, autoimmune diseases, acne, and hyperinsulinemic diseases. He argues that practitioners of the Paleolithic diet should derive about 56%?65% of their food energy from animal foods and 36%?45% from plant foods in a diet high in protein and relatively low in carbohydrates, with a fat intake similar to or higher than that found in Western diets. In modern forager diets, dietary protein is characteristically elevated at the expense of carbohydrate. He has also written on lifestyle in the evolutionary context, arguing that the optimal level of physical activity is on the order of 90 calories per kilogram per week. 

October 24th, 1950 in (Age 73)