Emeran Mayer, MD, PhD, is a gastroenterologist, a neuroscientist, and an author. At UCLA, he serves as the executive director of the G. Oppenheimer Center for Neurobiology of Stress and Resilience and as the codirector of the Digestive Diseases Research Center. He has spent over forty years studying the interactions between the brain and the gut and the rest of the body. Today, he shares the most significant research and actionable tips from his new book, The Gut-Immune Connection.