Our minds are modern, but our bodies and brains still need the same food. Gastroenterologist Walter L. Voegtlin first popularized the Paleo diet in the 1970’s. He argued in, "The Stone Age Diet," humans as carnivores, chiefly needs fats, proteins and a small amount of carbohydrates for optimum performance. For the last 30 years, obesity has been increasing in the United States. Our modern diets are laden with preservatives, processed sugars, and fried foods. Today’s health crisis has led to a renewed interest in Voegtlin’s tested approach to healthy living.