Kellyann Petrucci, MS, ND, is a board-certified naturopathic physician, a certified nutrition consultant, and the author of four books, including Dr Kellyann's Bone Broth Diet and Dr Kellyann's Cleanse and Reset, which was a New York Times bestseller. Dr. Kellyann has been a host for public television specials and has appeared on The Dr Oz Show, The Doctors, Good Morning America, and Today. She is a concierge doctor for celebrities in New York and Los Angeles.