Kellyann Petrucci, M.S., N.D., is the author of Dr. Kellyann’s Bone Broth Diet(Rodale, 2015). 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, and national news programs. She is the driving force behind the website DrKellyann.com, and has authored six books for John Wiley & Sons. These include Living Paleo for Dummies — one of the highest-selling Dummies books of all time. In addition, she is a regular contributor to The Huffington Post and MindBodyGreen. She is the creator of the 30 Day Reset Program, which helps people lose weight, regain their energy, and reverse the effects of aging.

Dr. Petrucci did postgraduate work in Europe, studying naturopathic medicine in England and Switzerland. She is one of the few practitioners in the United States certified in biological medicine by the esteemed Dr. Thomas Rau of the Paracelsus Klinik Lustmuhle in Switzerland.