The Obesity Code
Why you’ve never been able to lose weight, and how that can change now

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.

“Fung zeroes in on why insulin resistance has become so prevalent and offers specific outside-the-box solutions that have emerged as the key to maximizing health."
—Jimmy Moore, author, Keto Clarity and Cholesterol Clarity

The Obesity Code Details

Book TitleThe Obesity Code
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The Obesity Code Reviews

  • Nick
    Oct 24, 2016


    This book was the first thing I've read in years to fundamentally change my perspective on obesity. I will caveat that it could be all wrong, and I could be writing a glowing review for bad theories. However, I'm more hopeful than I have been in ages. Things make sense, the concepts ji...

  • Leanne Hunt
    Oct 16, 2016

    Leanne Hunt

    This book had some really good information in it. I found it very well researched, if a little dry, and it certainly made me think about how I approach the subject of dieting. However, I can't see the book becoming a household favourite because it is rather repetitive and leans more to...

  • Elaine
    Oct 16, 2016


    it was well written and very comprehensive. But I didn't love it. I would have to look up other books to determine their date of publication, but I felt like I had read parts of the book in the past. His conclusion and recommendation to fast of course is original material but the backg...

  • Matthew Shurtz
    Oct 16, 2016

    Matthew Shurtz

    The opening line for the first chapter, "Here's the question that has always bothered me: why are there doctors who are fat?" From then on he destroys everything you thought about dieting. He even promotes fasting. Dr. Fung's name will be brought up more and more in the dieting realm. ...

  • Chris Bartos
    Oct 12, 2016

    Chris Bartos

    The best diet book ever!I've read more diet books than I know what to do with here is why this book is the best:1. It explains why calorie restriction doesn't work.2. It explains why over eating doesn't cause you to gain weight.3. It explains in simple terms why we get fat.4. It's a wh...

  • Ahmed
    Oct 10, 2016


    I understand so much more about what's going on in my body thanks to this book. I just wish that I could've had this knowledge 20 years ago. He is methodical, using experimental data only on humans, and lots of it. He makes a convincing argument (that I plan on testing) that calorie co...

  • Gina
    Oct 9, 2016


    Excellent book! Every health/diet/fitness expert needs to read this. One of the greatest weight loss book that cuts through all the stuff taught out there. Fascinating information provided by science, facts, data, experiments & human observation. If you want your vehicle to run eff...

  • Jo-Lane Birkigt
    Oct 9, 2016

    Jo-Lane Birkigt

    Absolutely enlightening! ...

  • Richard
    Oct 6, 2016


    This book is like a mystery where the author builds suspense as he methodically leads the reader to the "whodunit" ending. Then he becomes the prosecuting attorney as he builds his case against the "perp". He repeatedly hammers his points home to you the reader. Finally, he presents hi...

  • T G Wilson
    Oct 6, 2016

    T G Wilson

    Enlightening. ...