Bite into Volumetrics to lose the pounds; weight-loss book ranks No. 6 | Penn State University
Barbara Rolls' Volumetrics received the No. 6 spot for best overall diets by U.S. News and World Report for 2015. The Volumetrics approach focuses on feeling full on fewer calories, and food is divided into four categories based on energy density. Volumetrics has made the U.S. News & World Report’s top 10 diet lists since 2011.