Why intermittent fasting is the key to controlling your weight

The landmark book from New York Times-bestselling author Dr. Jason Fung, one of the world's leading experts on intermittent fasting for weight-loss and longevity, whose 5-step plan has helped thousands of people lose weight and achieve lasting health.

“Not only full of insights but also surprisingly funny. Read it to understand why the world became fat, how to reverse the epidemic—and how to stay thin yourself.”
—Andreas Eenfeldt, MD, Founder of dietdoctor.com
Everything you believe about how to lose weight is wrong. Weight gain and obesity are driven by hormones—in everyone—and only by understanding the effects of insulin and insulin resistance can we achieve lasting weight loss.
In this highly readable and provocative book, Dr. Jason Fung sets out an original, robust theory of obesity that provides startling insights into proper nutrition. In addition to his five basic steps, a set of lifelong habits that will improve your health and control your insulin levels, Dr. Fung explains how to use intermittent fasting to break the cycle of insulin resistance and reach a healthy weight—for good.

Dr. Jason Fung is recognized as one of the world’s leading experts on fasting for weight loss and diabetes reversal, and his work has been featured in outlets such as the Atlantic, the New York Post, Forbes, the Daily Mail, and Fox News. He is the author of several books, including The Complete Guide to Fasting (co-authored with Jimmy Moore) and the bestselling The Obesity Code. He lives in Toronto, ON.

Dr Jason Fung's profile page

Timothy Noakes is Professor of Exercise and Sports Science at the University of Cape Town. 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.

Timothy Noakes' profile page

“Not only full of insights but also surprisingly funny. Read it to understand why the world became fat, how to reverse the epidemic—and how to stay thin yourself.”
—Andreas Eenfeldt, MD, Founder of Dietdoctor.com

“Dr. Jason Fung’s explanation of insulin resistance and the accompanying insulin model of obesity is original, brilliant and game changing.”
—Zoë Harcombe, Obesity researcher, author of The Harcrombe Diet

“A fantastic book that exposes some of the world's most pervasive myths about obesity and weight management. A must read for anyone interested in the science of diet.”
—Kris Gunnars, nutrition researcher

“In The Obesity Code, Dr. Jason Fung triumphs in explaining the core underlying causes of obesity and manages to simplify it in a way that anybody can understand. If more doctors and people were able to understand these causes and implement Dr. Fung's actionable advice then we would be able to start reversing the obesity epidemic tomorrow.”
—Sam Feltham, USA Today World Fitness Elite Trainer of the Year