Kellyann Petrucci, MS, ND, is a board-certified naturopathic physician, a certified nutrition consultant, and the author of ten books, including the New York Times bestseller Dr. Kellyann's Bone Broth Diet and The 10-Day Belly Slimdown. A concierge doctor for celebrities in New York and Los Angeles, Dr. Kellyann has been a host for Public Television specials and has been featured on Dr. Oz, The Doctors, Good Morning America, and Today.