Dr. Jason Fung is a New York Times-bestselling author whose books include The Obesity Code, The Diabetes Code, The Obesity Code Cookbook, The PCOS Plan, Life in the Fasting Lane, and The Complete Guide to Fasting (co-authored with Jimmy Moore). Dr. Fung completed medical school at the University of Toronto and a fellowship in nephrology at the University of California. Dr. Fung is also the co-founder of The Fasting Method, a program to help people lose weight and reverse Type 2 Diabetes naturally with fasting. He lives in Toronto.

Nina Teicholz is an investigative journalist and author of the New York Times-bestseller The Big Fat Surprise, which upended the conventional wisdom on saturated fat and was named Best Book of the Year by the Economist and the Wall Street Journal, among others. She has also contributed to many publications, including the New York Times, Washington Post, New Yorker, and Economist.