The Obesity Code: A Complete Summary The Obesity Code is a book written by Dr. Jason Fung. In his book, Dr. Fung touches one of the most sensitive questions about human health: obesity. The Obesity Code is a book in which we can find facts and explanations about why humans usually gain weight and what is preventing people from losing it. We have all seen many people who seem to enjoy any food they like at any time during the day and not gain any weight...