Dr. Jason Fung is a nephrologist and one of the world's leading experts on fasting for weight loss and type 2 diabetes reversal. He is a co-founder of the Fasting Method, which teaches people how to incorporate intermittent fasting and healthy eating in their lifestyle, and supports them on their journey to better health. He 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. Timothy Noakes is Professor of Exercise and Sports Science at the University of Cape Town, a marathon runner, and the author of the bestseller The Lore of Running. After discovering research supporting a high fat, low carb diet as the healthiest option for many people, he started the Noakes Foundation in 2012, and has dedicated his life to opening people's eyes to the myth of low-fat eating and the nutritional and environmental crisis it has led us to.