Jason Fung Jason Fung, MD, is a physician, author, and researcher. His groundbreaking science-based books about diabetes and obesity, The Diabetes Code, The Obesity Code, and The Complete Guide to Fastin have sold over one million copies and challenged the conventional wisdom that diabetics should be treated with insulin. Dr. Fung is also the co-founder of The Fasting Method (www.TheFastingMethod.com), a program to help people lose weight and reverse Type 2 Diabetes naturally with fasting. His work on fasting has been cited by CNN, Time, The Atlantic, Forbes, The Toronto Star, and many other media outlets. Read More Read Less