The Obesity Code by Jason Fung

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 pro...

Details The Obesity Code

TitleThe Obesity Code
Release DateMar 4th, 2016
PublisherGreystone Books
GenreHealth, Nonfiction, Science, Nutrition, Self Help, Food and Drink, Food

Reviews The Obesity Code

  • Laurie Anderson
    Terrible title, great book. The focus is changing your habits to reduce insulin output and insulin resistance in order to eliminate or modulate Type 2 diabetes & metabolic syndrome. Losing weight can play an important role in this. The author (a physician) provides loads of data and studies that refute the "carbs are great, fat is awful & sugar is OKish" message that we've been hearing since the 1970s. He provides evidence that says the healthies...
  • Negin
    This is a fabulous book, probably the best diet/health book that I’ve ever read. I’ve been meaning to read this for a while, but there was a bit of a dread factor. Honestly, I’ve read so many diet and health books through the years, that I needed yet another one like I need a drill through my head. I thought that this would be boring and that I would simply skip to the part where he tells us what to do. I was pleasantly surprised that I did...
  • 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 whole lifestyle approach to losing weight.5. It doesn't tell you one diet is better than another, but it tells you exactly why most diets work but for only about 6 mo...
  • Theresa Alan
    “Diets work well at the start, but as we lose weight, our metabolism slows. Compensatory mechanisms start almost immediately and persist almost indefinitely.”This book challenges many of the things I was taught growing up about weight, nutrition, and health. I was a teenager in the late 80s, a time well before we had any activism in regards to fat shaming. At that time, if you were overweight, it was because you were a bad person—slothful, ...
  • Christy
    The Obesity Code is the 5th book in my non-fiction challenge for 2018. This book was very informative and interesting. It focused on insulin resistance being the trigger for those who struggle with weight loss- more in the long term than short term. It also touched on fasting and intermittent fasting and the pluses of that. Overall, it was an informative read.
  • Otis Chandler
    The best book about how to eat healthy and the reasoning behind it that I've yet read. Well backed with science and uses studies to make all his points. Highly recommended for everyone (the title is misleading, its not just for obese people). The main theory of the book is that the root cause of obesity and weight gain is a complex hormonal imbalance, that stems from high blood insulin levels. High insulin levels are responsible for obesity, and ...
  • Cindy Rollins
    I know a lot about dieting having done it for most of my life. I know that calorie counting does lead to yo-yo weight management and yet it is often the only option. Recently, I lost 25 lbs going back to Weight Watchers and now I am in the inevitable plateau with a few pounds creeping back up. This book was long, drawn out, and logical. If it hadn't been I might have rejected the ideas Dr. Fung promoted, especially the idea of intermittent fastin...
  • Stephanie *Extremely Stable Genius*
    Don’t let the title of this book put you off, it’s not a diet book. I typically don’t read diet books because diets are pointless.... we all know that.More precisely (as pointed out in the book), all diets work at first and then one plateaus and then the weight comes back. On top of that, now you’ve lowered your metabolism because you pissed off your body, because it was perfectly happy at the weight it was, so it increased your hunger an...
  • Angela Boord
    I'm not at all sure how to rate this book. Overall, I think his argument that chronically high insulin levels cause obesity is probably true. But there are some logical gymnastics involved in this book, too. There was a lot of assertion that "calories don't matter" and "calories in/calories out" is wrong. But getting rid of snacks, as Fung suggests, will, for most people, automatically reduce calories. Replacing a piece of white bread and butter ...
  • Canadian
    Unfortunately saddled with a poor title, The Obesity Code is not shilling some new fad diet or weight-loss program. In fact, this reader friendly, direct, and humorous book addresses the very serious problems with insulin resistance that so many who eat a western diet high in refined grains (and sugar) are plagued with. A trained nephrologist, Jason Fung has extensive knowledge based on years of experience with patients whose kidney failure and o...
  • Andy
    Dr. Fung does a nice job critiquing the nonsense we were all taught for 50 years about calories and cholesterol, etc. Unfortunately, he seems to have hoisted himself on his own petard. He lambastes others for recommending things that are not evidence-based, but then his big advice is to fast, whereas the evidence indicates that fasting doesn't work any better than calorie restriction:'s a shame Fung went...
  • Alice Cai
    5* So this review covers like 2/3 of the book. I'm getting kinda lazy at the end here. I got bored so I skimmed the actual weight loss advice at the end. This book is probably the best non-fiction I've read so far. The first 2/3 of the book is mostly about things you shouldn't do to lose weight / weight loss myths and it's like reading plot twist after plot twist because it's all bad news. If you are actually reading this to lose weight the last ...
  • blake
    I had just finished watching Jason Fung's six part video series, The Etiology of Obesity on YouTube, and it crystallized a lot of what I've learned over the years regarding hormones and weight loss/gain, so I thought I'd pick up the book and see what else he had to say.Well, honestly, most of the stuff he talks about in the book is in the videos (which I sort of figured), so you don't really need the book, though it's nice to have a more convenie...
  • Crystal Starr Light
    Bullet Review:Mixed bag. On one hand this is one of the only health books I've ever listened to that actually said "Different people gain weight for different reasons" and "All diets work in the beginning". Basic, but somehow still shocking.On the other hand, this book is another one of those "Diets don't work, so do my diet". Um, really? Calories in =/= Calories out so let's just not eat for several days and we'll see the weight slide off. And t...
  • Moonkiszt
    So. The secret, the ancient wisdom lost in the ages is fasting. Dr. Fung's point is that we are focusing on the wrong things - that insulin causes obesity, and we need to work on getting our insulin balances balanced and the way that is done is through periods of low insulin (fasting) and higher insulin (feeding) - of course he refers those who have known issues to check out plans with their docs. Other tips are avoid sugar, fake sugar and cola; ...
  • John
    I have struggled for most my adult life to keep my weight at a healthy level. Usually this means going on a major diet for several months every few years. I'm doing that now, and have lost more than 25 pounds. It feels good. But over the past eight weeks or so, even though I've kept to my diet, the weight has stopped coming off. Very discouraging.So Jason Fung's book explains this phenomenon--and much else. He explains how a focus on calories mis...
  • Cindi Seal
    Dr. Fung does a great job convincing that insulin and insulin resistance cause weight gain (as opposed to the overly simplistic and flawed calorie deficit model); however I was disappointed when reaching the end of the book. I understand no one book or person will have the answer/cure for obesity, but reading the recommendations for fasting, only to find that weight loss differs from person to person using this method and that there are plateaus ...
  • Laura (Kyahgirl)
    4/5; 4 stars; A-This book was written by a Canadian doctor, a nephrologist in fact, who came to the topic by the way of treating patients for issues related to diabetes. I would highly recommend it for a couple of reasons. First, it gives a really good explanation of the all the hormones that impact blood sugar, hunger, saiety, metabolism, etc. And second it discusses aspects of nutrition that have been used to mislead consumers. Basically, food ...
  • Nikhil P. Freeman
    Worked for me. Lost 18 pounds of fat in thirty days with a low-carb, high fat, moderate protein diet in conjunction with intermittent fasting.
  • Lisa Kay
    Please, please, please--if you are trying to decide if you should read this book or if this Way of Living is for you--and you see some reviewers’ post that this is basically a calorie reduction diet, ignore them! This doctor explains why calorie restriction does NOT work, and can actually be detrimental to your resting metabolic rate. If a review you’ve read doesn’t discuss INSULIN and its affect on your body, then the reviewer obviously ha...
  • Aneliya Petrunova
    (Прочетете по-долу на български)Jason Fung's book "The Obesity Code" is a valuable addition to the library of anyone who is interested in healthy eating, obesity and weight loss. The author is a doctor (nephrologist) who has dedicated himself to fighting obesity and diabetes. He bases his book exclusively on studies done on humans (since humans are not rats and results from rat studies are not directly applicable to huma...
  • Mara
    Probably the book I would now recommend as the place to start if you're interested in eliminating sugar & processed foods from your diet and making it stick... I think you really do need to understand the WHY of sugar elimination, not just the what, or else it doesn't last. He does a very nice job of breaking down why the calories in/calories out model doesn't sufficiently explain the underlying causes of obesity. I also appreciate that he sticks...
  • Bobbi
    I've read a number of books about nutrition and although this title covered many of the same topics as Good Calories Bad Calories and The Big Fat Surprise, it was the first to help me understand that when you eat matters. I highly recommend this book to anyone interested in the topic of nutrition.
  • Katy
    Yet another book that has changed my life this year. I finally feel like I understand why I have such a hard time maintaining weight loss. Insulin resistance.Full disclosure: I have been diagnosed with PCOS (closely correlated with insulin resistance, and metabolic syndrome), and although I can easily lose weight through sheer brute force and willpower, I find it hard to maintain it. Finally I have my answer - I have never addressed the underlyin...
  • howl of minerva
    Horrible title but excellent content. Fung is Canadian nephrologist who got tired of seeing his patients tread the well-worn path from obesity to type-2 diabetes to end stage renal failure to death. He decided to devote himself to studying and treating the metabolic syndrome. The findings are clear and Fung refers to all the relevant studies in major peer-reviewed journals. Essentially, 50+ years of studies show convincingly that eat less-move mo...
  • Pritesh
    One of those life changing books! The name of the book is a little off-putting. However, in spite of the name, everyone should read this book even if they are not overweight. The book breaks down many food related myths that impact our health. For example, "breakfast is the most important meal of the day". The book explains very well that it’s not. Only eat breakfast if you are really hungry. For the first time, I understand why fasting is impo...
  • Jeanmarie Giambra
    Best Book Ever to Overcome Obesity with calorie counting & weighing food & excessive exercise.The best weight loss book that cuts through all the mixed messages and myths we are taught. I wanted a scientific examination of how the body operates and I already assumed hormones play a huge role in obesity. This book has confirmed my suspicions. I am not wasting my time and money for another false hope and many more contradicting messages that are wr...
  • Tonya
    Truly life changing- medical based information on obesity and diabetes... changing your mind set then changing what you eat and when you eat. This is one worth owning as I keep going back to it again and again to look something up!Dr Fung presents the science behind why we keep struggling to lose weight and how to combat it y going to the root inside the body (insulin) and getting it in check. I’m down 10 lbs so far from using this book and Del...
  • Flaviu Vescan
    If you haven't been following the "winds of change" in terms of nutrition advice lately this book will be a great overview of where we are at this current point in time. There are many misconceptions out there in terms of what a healthy diet means and the book uses a dive in biology to explain why they only work short-term (calorie restriction, keto, atkins etc.). It also gives solid advice on making long-term changes to your insulin resistance. ...
  • Angela
    I find diet/nutrition books difficult to read. Not only are they often partial and almost always dry, but there is so much conflicting “evidence” out there that it’s difficult to decide who to trust. Most authors of these types of books have enough letters following their name that your eyes water at the thought of how many years of schooling it took them to become an “expert”. However, with much of this expertise being in direct opposi...