Kellyann Petrucci, MS, ND, is a board-certified naturopathic physician, certified nutrition consultant, and the New York Times bestselling author of Dr. Kellyann’s Bone Broth Diet. She is also a concierge doctor for celebrities in Los Angeles and New York and is featured on the public television special 21 Days to a Slimmer, Younger You. Dr. Petrucci is a regular guest on television shows including Dr. Oz, The Doctors, Good Morning America, and other national news programs.