Mark Hyman, M.D. has dedicated his career to identifying and addressing the root causes of chronic illness through a groundbreaking whole-systems medicine approach, known as Functional Medicine. He is a family physician, a five-time New York Times bestselling author, and an internationally recognized leader in his field. Through his private practice, education efforts, writing, research, advocacy and public-policy work, he strives to improve access to Functional Medicine, and to widen the understanding and practice of it, empowering others to stop managing symptoms and instead treat the underlying causes of illness, thereby also tackling our chronic-disease epidemic.