In this episode, I speak with two world-class nutrition experts Dr. Stephen Guyenet and Dr. Mario Kratz. Dr. Guyenet is a neurobiologist and obesity researcher. His scientific publications have been cited more than 4,000 times by his peers. His book, The Hungry Brain, was named one of the best books of the year by Publishers Weekly and called "essential" by The New York Times Book Review. Dr. Kratz has a master's of science in nutritional sciences and a Ph.D. in nutritional sciences from the University of Bonn in Germany. He has been involved in arteriosclerosis research at the University of Münster in Germany. Dr. Guyenet and Dr. Kratz work together at Red Pen Reviews - a nonprofit organization dedicated to publishing unbiased, scientifically accurate reviews for different nutrition diet books that are hitting the market.