Mark Hyman, M.D. Mark Hyman is a physician, bestselling author, and advocate for functional medicine. He co-founded Function Health and serves as its Chief Medical Officer, and has written extensively about nutrition, chronic disease, and preventive health.
Mark Hyman, M.D. Mark Hyman is a physician, bestselling author, and advocate for functional medicine. He co-founded Function Health and serves as its Chief Medical Officer, and has written extensively about nutrition, chronic disease, and preventive health.