James J. DiNicolantonio, PharmD, is a cardiovascular research scientist and doctor of pharmacy at Saint Luke's Mid America Heart Institute in Kansas City, Missouri. A well-respected and internationally known scientist and expert on health and nutrition, he has contributed extensively to health policy and has even testified in front of the Canadian Senate regarding the harms of added sugars. He serves as the associate editor of British Medical Journal's (BMJ) Open Heart, a journal published in partnership with the British Cardiovascular Society. He is the author or coauthor of approximately 200 publications in the medical literature. He is also on the editorial advisory board of several other medical journals. Dr. DiNicolantonio is the author of the bestselling books The Salt Fix and Superfuel. Dr. Jason Fung trained in Los Angeles and Toronto as a kidney specialist. It soon became obvious that conventional medical treatments were failing patients. The problem is obvious, in hindsight. Many of today's medical issues are related to obesity, and if you don't deal with the root cause, the other problems don't get better either. Following core physiologic principles, he founded the Intensive Dietary Management Program (www.IDMprogram.com) to provide a unique treatment focus for type 2 diabetes and obesity. Rather than focusing on medications, this clinic focuses on dietary changes that are simple yet effective. He pioneered the clinical use of therapeutic fasting for weight loss and type 2 diabetes reversal. Dr. Fung is the author of The Obesity Code, The Complete Guide to Fasting, and The Diabetes Code. He is also the scientific editor of the Journal of Insulin Resistance and the managing director of the nonprofit organization Public Health Collaboration (Canada), an international group dedicated to promoting evidence-based nutritional information.