Kellyann Petrucci, M.S., N.D., is the author of the New York Times bestselling book Dr. Kellyann’s Bone Broth Diet (Rodale, 2015) and Dr. Kellyann’s Bone Broth Cookbook (Rodale, 2016). She also is the host of the PBS special, 21 Days to a Slimmer, Younger You. A weight-loss and natural anti-aging transformation expert, Dr. Petrucci has a private practice in the Birmingham, Michigan area and is a concierge doctor for celebrities in New York City and Los Angeles. She is a board-certified naturopathic physician and a certified nutrition consultant. Dr. Petrucci is a regular guest on television shows including The Doctors, Dr. Oz, Good Morning America, and national news programs, and has authored six books for John Wiley & Sons. In addition, she is a regular contributor to The Huffington Post and MindBodyGreen. She is the driving force behind the popular website drkellyann.com.