Emeran Mayer, MD, has studied brain-body interactions for the last forty years. He is the executive director of the G. Oppenheimer Center for Neurobiology of Stress and Resilience and the codirector of the Digestive Diseases Research Center at the University of California at Los Angeles. His research has been supported by the National Institutes of Health for the past twenty-five years, and he is considered a pioneer and world leader in the area of brain-gut microbiome interactions.