The premise behind the Volumetrics Diet, created by Dr. Barbara Rolls, is that people like to eat. Her solution is to eat more food that is less dense, like non-starchy vegetables, and to sneak them in to the dishes we’re already eating. Dr. Rolls is a professor of nutritional sciences and the Helen A. Guthrie chair in nutrition at Penn State. She’s creator and author of The Ultimate Volumetrics Diet, a #1 New York Times Bestselling Diet book. Listen to her interview with WPSU’s Patty Satalia.