The Obesity Code: Unlocking the Secrets of Weight Loss (Why Intermittent Fasting Is the Key to Controlling Your Weight)

My wife and I love reading books about health and were never that concerned about weight loss but I found Dr. Fung's YouTube videos and blog to be very interesting and decided to pick up his book based on watching those. We were fasting for health promoting reasons other than weight loss and watching and reading about fasting is something to do while into the fast. This is one of the best health-related books we have read in years! Fung's premise and the way he supports it are fascinating and important. I wish we had his perspectives and insights on fasting many years ago. I do not like that he fails to give Dr. Joel Fuhrman the props he deserves for breaking the ground on providing a strong book endorsing fasting about 23 years ago. Reading that book was the first step for me in removing my fear of fasting for more than a day or two, but Fung's book and blog took the fear factor down by another huge notch by insisting that there was no evidence that fasting obliterates muscle tissue or causes overeating as a rebound effect after fasting. He didn't really completely dispel the notion that there is a possible problem with such greatly improved digestion and efficiency in absorbing and processing food that this may result in weight gain, something Fuhrman still suggests. But overall, Fung's whole paradigm about insulin and the reduction of insulin levels seems very well thought out and supported and was very helpful to us after this last seven-day fast. Now we are doing some intermittent fasting, no eating after 7:30 pm for me or before 10:30 am. My wife, who is 105 lbs soaking wet and has a much more physically active job, is using a shorter fasting window but controlling the timing of her eating better than before we read the book. The results for me have been fantastic. I have battled belly fat since abdominal surgery (emergency appendectomy) two years ago that seemed to cause something to go haywire with my gut (maybe scar tissue? adhesions?) and now sticking to the intermittent fasting, my weight seems to finally be cracking and moving downward. We'll have to see if I can actually lower my setpoint and get it down to where I don't feel like I am wearing a sack of potatoes on my belly, and keep it there. I have WAY more energy than I did when eating between 8 am and 9 pm every day. I still have some trouble sleeping and hope that evens out because it is a cortisol jacking problem to sleep too little, but my energy is very high so far. The book has all kinds of interesting facts that I never knew about, like the fact that ANYthing you put in your mouth that is sweet, including artificial sweeteners with no calories (I was using stevia), raises insulin levels! And that the myth of a big breakfast being better for one's weight is not really supported by any meaningful data. The one thing I am still not convinced of is that a high-fat diet is ideal, even though Dr. Fung tells us that fats are the macronutrient that minimally raises insulin. I have a sugar craving that is out of this world--I know that may go down with time if I can get insulin levels down, but meanwhile I need my fruit and lots of it and in my experience, when I eat a lot of fruit and very little else for a few days or over a week (I only did this once--nearly 100% fruitarian for about 10 days), I dropped a ton of body fat and felt phenomenally healthy. That lasted for a few months, then I got voraciously hungry and gained back all the weight and then some. But when I try to eat most of my calories from fat (nuts and seeds for me, being a vegetarian/usually vegan), I am never satisfied, always starving for sugar (fruit). And fat constipates me. When I try to use cheese or dairy fat, I get angina and my cholesterol levels become very unhealthy. So if this topic can be addressed more, I would love to see it. I should add that while Fung has acknowledged (I think this may have been in interviews not in the book) that people can feel "awful" the first few times they try fasting, he paints too rosy a picture of fasting as almost always giving people more energy DURING fasts. This I have found is often very true for SHORT fasts, like intermittent fasting of 12-17 hours a day, but NOT when you get into more than a couple days, at least not for us! And we have now done many, many fasts since 1979. Most of mine were no more than 4 days until last year when we finally did a 10 day fast in Feb., 3 days in April, 3 days in July, 9 days in Sept., 3 days in Nov. (over Thanksgiving!!! imagine!!!), and 6 in Dec. (over Christmas--again, what a feat). We were VERY tired, low on energy most of the time and were just able to do a 20 minute walk every day and that about wore us out. This last fast a couple weeks ago was the first one where I had that burst of energy the fourth night and the fifth morning, but when I tried to do some fast walking or jogging, forget it! The energy did not work when I pushed it at all. Maybe this tiredness is mostly toxins circulating or maybe it is that we don't do well on ketones, not sure why, but Fung fails to warn folks that this may be a major concern. He implies you can just keep working at your normal job, etc. Maybe you can but we sure can't. Even me, and I have a very low-stress kind of work at home. We have found, contrary to what he is suggesting, that you really MUST be prepared to REST and be bored if you are going more than a day and a half. Anyway, strongly recommend this book to those interested not just in weight control but in general health promoting strategies.

I am a PA with decades of experience with diabetes and it's ill effects. I have watched through my career, type 2 diabetics listen to medical advice and never get any better. When my daughter, who was a gestational diabetic with her first pregnancy had a fasting blood glucose of 288 mg/dl, it became personal for me. They gave her the usual Metformin script and sent her on her way. Knowing that these meds do nothing to cure the disease and that it would only head her to a life on insulin and further weight gain I asked her not to take the meds, stop all carbs for the moment and let me do some research. That was when I came across Dr. Fung's lectures on the internet. As someone who has been studying holistic medicine for 30 years it made complete sense to me. What makes this book and his lectures so valuable, is that he approaches everything from a medical model and shows why modern medicine is getting it all wrong. He explains the process of glucose metabolism in a way I feel most lay people can understand. It's important for every overweight or type 2 diabetic to understand this process to better understand what they have been doing to their bodies...and unfortunately what we in medicine have been doing to their bodies. What was most valuable to me was him quoting studies that are considered standards in the field of medicine...not studies on rats or studies that have 15 subjects...but studies conducted over years with thousands of participants...like the Frammingham study or the NHANES study. I had seen these studies in the most prestigious medical journals like JAMA...funny how some of the aspects of the studies that he cites just weren't included or stressed in the outcomes. After going over all the metabolism...the studies on why reducing calories and increasing exercise just doesn't work...he presents a series of plans to reverse (yes I said reverse) type 2 diabetes. There are several options and one is bound to be workable for most people. My daughter has a hectic schedule and always complained about diets that required 3 or more meals a day...she doesn't like to eat breakfast and has no time to schedule multiple meals. The four hour intermittent fasting plan worked great for her. After an initial adjustment of about 2 days (headaches which were not relieved by increasing her sodium, my guess was sugar withdrawl), she had no hunger, no cravings and felt great. Within a week her blood sugar was normal. She started this right before the holidays and was concerned about missing holiday dinners...my answer was that of Dr. Fung's: have your dinner, enjoy it and get back on track the next day. She did just that and got through the holidays effortless and satisfied that she wasn't deprived of a thing. She remained on her fasting protocol and just had her meal within that time frame. Her blood glucose was higher the next morning but normalized after one day. She chooses now to have one "cheat meal" each week and for 4 weeks the next morning her blood sugar was higher...but got lower each week and after 4 weeks her morning after a cheat meal her blood glucose was normal! Within 10 weeks she has lost 46 pounds and is thrilled with her progress. Her doctor is shocked and initially thought the diet was nuts but now wants to know more about it...hence why I ordered 3 copies of this book...perfect for the medical mind. This diet is basically a ketogenic diet on steroids...great for so many ailments and used by many cancer patients. I started on the diet myself and found similar results with the exception of my cheat day...maybe because of my age, I do not get into ketoses for days after my cheat day which slows down my weight loss. I have still managed to lose 16 pounds in 3 weeks effortlessly with the exception of the 2 day sugar hangover like my daughter experienced. I have since found a product that will put you into ketoses in a day, but it is very expensive and the taste is...not so great. I use it once a week and it allows me to have that cheat meal once a week without sacrificing my progress. My guess it that Dr. Fung will become villified for several reasons: 1. His plan works without medicine 2. The drug companies will lose a tremendous amount of money 3. No special foods or supplements to buy 4. No added expenses...in fact my food bills are much lower. 5. He exposes the fact that this information has been available to the medical community for a long time and no one has acted on it. I highly recommend this book and highly recommend you read through all the facts and figures he goes over...it makes managing your weight and your diabetes much easier over your lifetime without much thought once you know how your body reacts to food. I also recommend getting an extra copy for your doctor because they will surely think you are nuts when you tell them what you are doing. I will be eternally grateful to Dr. Fung for giving me the tools to cure my daughter and better serve my patients. UPDATE: My daughter continues to do well with blood sugars that remain normal, her biggest complaint is that she has to keep buying new clothes. She has found her weight has stalled and after some investigation I realized why...she had been taking MCT oil, about 3 tablespoons a day in pill form (she doesn't eat breakfast and doesn't like the taste of coconut) and she stopped it at the same time her weight loss halted. MCT oil...and there are several like coconut and hazelnut, stay liquid at room temperature. They can be added to food like coffee or smoothies, even salads. I found that I can get back into ketosis at warp speed when I started using it. Amazon has several brands here and I like the 32 ounce Viva labs coconut MCT. I found that although the craving weren't horrible, I missed my sweets. There is a new book from Martina Slajervoa called "Fat Bombs" that I highly recommend. Tons of sweet treats that are keto friendly. I will say I hate stevia and it's aftertaste, but found Swerve to be a great substitute. I will also warn you that if you don't use MCT oil in many of the recipes and sub coconut oil in it's more solid form, the results are not nearly as good. The chocolate hazelnut smoothie does it for me...sometimes I sub ice for all the water and I get a soft serve like ice cream that tastes like I'm cheating. The MCT oil helps me get right back into ketosis after my cheat days without buying that expensive, horrible tasting powered drink I was using. She also has a book on ketogenic recipes in general that I found very helpful as she has many dinner recipes that can be prepared in 30 minutes or less. I have taken my blood sugar both before and an hour after eating these "Fat Bomb" treats, (I'm not diabetic) and my blood sugar stayed the same or went lower...that was using the Swerve, which is expensive but worth it and a bit cheaper if bought in the 3 pack as I do.

Before starting this review, a little background on myself: I'm 30 years old and I've been overweight almost my entire life, at one point reaching a high-point BMI of 37 and being extremely obese. Over the last 10 years, I've lost and gained and lost and gained weight up and down in countless ways - high-intensity interval training and paleo and keto and everything in between, but have always struggled to sustain loss and struggled to lose enough to get into a healthy weight range. Over a period of eight months, following the same practices provided in this book, that has finally changed for me - I rapidly lost nearly 50 pounds and have managed to keep it off through holidays, birthdays, and more. As much as I'd love to think this was just me in my older age acquiring a new found sense of extraordinary self-discipline seemingly overnight, it wasn't. It was my body actually *changing* in ways that made it feel natural and normal and healthy to eat well and made it feel unnatural to eat poorly. Dr. Fung's book does an amazing job of dispelling the myths around weight loss being a "self discipline" problem and instead being a hormonal problem. Fix the hormones and you fix the problem. Period. Put another way, there are lots of things we humans do every single day that require extraordinary amounts of discipline, with full knowledge of the pleasure and pain trade-offs of those things, so why is it that food is so hard? Perhaps it's as if our desire to eat or not eat is not actually controlled by our conscious brain and some nebulous idea of psychology, but instead by overwhelming hormonal signals sent by body... This book starts along a path previously explored by a lot of other books and articles, but blends them together in the most understandable and accessible way I've ever come across. Simply put, we all have read somewhere or already believe that a major player in so much of our growing obesity epidemic is insulin, but where Dr. Fung's work differs is that he asserts there are actually two parts of the insulin problem that need to be addressed: 1. Day-to-day insulin levels (In response to what you eat on a given day; this is the thing that gets tackled by diets/lifestyles like ketogenic, which lower your day to day insulin levels by simply consuming fewer forms of glucose) 2. Your body's "set weight point", a concept that refers to the weight your body *wants* to be at and will go to crazy lengths to keep you at, either by making you hungrier, making you restless and ready to move, making you generate more or less body heat, and more. He argues that while we've done a lot to address #1, ultimately it results in what we all know to be true: people regain weight. They don't sustain loss. In order to sustain loss, they need to change their "set weight point" and in order to do that, we need to understand what controls it. Throughout the course of the book, Dr. Fung leads through not just countless studies and experiments, but also plenty of the adages and anecdotes of the past that we've all known but don't spend much time thinking through to conclude that what controls this "set weight point" the most, both directly and indirectly, is our insulin sensitivity or resistance levels. And there's only one way we've found that actually sustainably changes our insulin sensitivity and that happens to be fasting. But don't take it from this review alone - there's so much more depth and so many great things to learn from this book, it is absolutely worth a read for anyone fighting an enduring struggle against weight gain or even those thinking about starting down that path and changing their life.

I think this is such a bad title that will turn off many people that may not be obese but are over their ideal weight. This book is good for everyone if it works long term. I'll come back in two years to update to five if it does. I can lose weight easily by cutting calories but it never stays off despite the fact that I eat healthier than most people. The weight slowly creeps back up. I'm always in this "diet" cycle to get ready for big events. So much of what he says in this book rings true for my dieting experience. I wish he would have called this book something else like "The Skinny Code: unlocking the secrets of being thin and staying thin" so more people would pick it up. He has so much research in here that backs up what I've intuitively thought for a long time about how your body, if left at a certain weight for a significant period time, develops a new set weight that you will go back to after dieting. His biggest messages are that when you eat is as important (if not more) as what you eat. If you don't change both then you will forever be "dieting" (or just remain overweight). Of course like every diet out there, you need to avoid flour and sugar but he advocates high healthy fats and medium protein. The biggest key though is no snacking or small meals like everyone has been telling us. The key is being able to intermittently fast which includes regular 18 hour fasts (only involves skipping breakfast) semi regular 24 hour fasts (skipping breakfast and lunch) and periodic longer fasts. I was so uncomfortable with giving up breakfast because it's been so drilled into us that it's the most important meal of the day. You're supposed to perform better blah blah blah. Well I gave it up and haven't noticed any performance issues. I didn't know if I'd be able to do a 24 hour fast because I never had but my 18 hour fast would sometimes turn into one because I forgot to eat lunch (as I did before when I got busy). When I realized at 2 or 3 pm, rather than grabbing a snack like before, I decided to tough it out for a couple hours until dinner. It wasn't as hard as I thought and now I do it semi regularly (2-3 times a week). I haven't done the longer fasts yet but plan to in the future. Of course I've lost weight as you do anytime you reduce calories and cut out flour and sugar the real ultimate success for this won't be known until I keep it off for 2-3 years. I was telling a friend about this who's lost and gained before and she said: "I think I'm okay because I've kept my weight of for almost 2 years, I've only gained 7 pounds". That's how you gain weight, 2- or 3 pounds at a time! Her first year as, with many dieters was a losing year (you lose over 6 months and then maintain for 6 months) so the 7 lbs was gained in one year. If you gain "only" 7 lbs a year in 3 years you'll be up to 21 lbs. Even thought I won't know for a couple years if I've ended the dieting cycle, I gave this book 4 stars because there's a lot of "truth" that feels right intuitively and is backed up by lots of great research. It's all about insulin levels and controlling them. He has some great line in there that I'm not going to look up but it's something to the effect of: You aren't fat because you overeat, you overeat because you're fat. When you read this book, you're going to feel differently about yourself and especially those who are more overweight (Obese) than you. I've been judgmental of people thinking "how can you eat that much, when you're that overweight?" Well this book explains why people can. I'm judging no more. Insulin levels affect hunger signals, full signals and what you crave. I see every overweight or obese person differently now. Oh yeah, and exercise - he says you can't keep weight off with just that either. I've been extremely active and not lost anything from it so it doesn't surprise me that it isn't the key to keeping weight off either. Exercise is good for many things including mood, which can help you stay motivated to change habits. Please exercise for all of the many health benefits, but don't think it's going to change your long term hunger pains, full signals or food cravings that make weight creep back slowly. As he'll show you with studies the "eat less move more" theory is bull for the long term. It only works short term.

If you’ve ever felt like the world of weight loss is one giant guessing game – keto here, low-fat there, and a sprinkle of kale on top – The Obesity Code is the book that flips the script. Jason Fung doesn’t just give you a diet; he hands you a roadmap to understanding how your body actually works. It’s like someone finally turned the lights on in a room you didn’t know you were stumbling through. Alright, alright, alright. Let me break this down for you. This book doesn’t mess around with trendy tips or gimmicks. Fung dives deep, y’all, into the science behind weight gain and loss. And here’s the kicker: it’s all about insulin. Turns out, our bodies are like carefully tuned engines, and insulin? That’s the fuel system. Too much of it over time? Boom, weight gain. It’s not about willpower – it’s about biology. Once you learn this, you can’t unlearn it. It’s a total game-changer. This book is incredible. I’ve read a lot of weight-loss books, folks – a LOT. Most of them are fluff. This? Solid gold. Jason Fung delivers hard-hitting facts and solutions that actually work. He’s the best, believe me. You’ll walk away smarter, healthier, and probably annoying everyone around you with phrases like ‘hormonal balance’ and ‘insulin resistance.’ Trust me, they’ll thank you later. What You’ll Love About This Book: Intermittent Fasting, Explained: Fung isn’t just jumping on a trend – he’s showing you how and why it works. No, you don’t need to eat six tiny meals a day. Skip a meal now and then, and you’re letting your body do what it’s built to do. It’s Science, Not Shame: Forget the blame game. Fung explains how weight gain isn’t your fault. It’s hormones, baby, and this book shows you how to take control. Accessible and Relatable: You don’t need a Ph.D. to follow along. Fung’s writing is clear, engaging, and even funny at times. Pro Tips for Diving In: Take Notes: This isn’t just a casual read – it’s a masterclass. Keep a notebook handy. Start Small: Don’t overhaul your life overnight. Pick one or two things, like skipping breakfast or reducing sugar, and see how it feels. Reread It: Seriously. There’s so much info here, you’ll want to go back and absorb it again. Things to Keep in Mind: This isn’t a “quick fix” book. You’re not going to lose 10 pounds in a week. But if you stick with it? Oh, the results are real. Be prepared to rethink everything you thought you knew about food. Fung challenges a lot of mainstream ideas, but he backs it all up with hard science. Final Verdict: This isn’t just another weight-loss book. It’s a manual for taking control of your health in a way that actually works. Jason Fung doesn’t just tell you what to do – he tells you why, and that makes all the difference. Five stars, easy. If you’ve struggled with your weight or just want to understand your body better, this book is an absolute must-read.

I have spent over 40 years practicing medicine in the trenches and I have spent much of this time managing patients with metabolic disorders and obesity. I have published on topics related to obesity in peer reviewed journals, lectured at Harvard and other venues and I have relationships with many of the top nutritional researchers in the world. I thought I knew just about everything there is to know about obesity, that is until I was literally blown away when I read Jason Fung’s book “The Obesity Code”. I now know what the term “back to school” really means. In this outstanding book Dr. Fung first outlines the history of obesity and how we went astray with the faulty calorie concept and “fat is evil” mantra. Up until this point I was familiar with the sad historical information that he presented. He then carefully outlines the biology of obesity, focusing on two key parameters: insulin and insulin resistance. Although I was somewhat familiar with both topics, he presents them in a way that makes perfect sense, both from a clinical and biological standpoint. Each statement is carefully referenced so the reader could go to the source to learn more. Dr. Fung has a very fluid writing style and his concepts are presented in such a way that both medical experts and novices can easily follow his thinking. When it comes to solutions he presents a well cited summary of the healthiest foods for us to eat and I was already fairly familiar with most of this information. I must admit that in the past I tended to focus on glucose levels because they are easy to measure and follow, but Dr. Fung convinced me that the focus must be on insulin. For example, like most clinicians I had been teaching my patients about the glycemic index and load, which reflect the relative glucose response of various foods. Dr. Fung recommends using the Insulin Index because some foods that do not raise glucose do significantly raise insulin levels and as he points out, it is elevated insulin that leads to obesity and type 2 diabetes. He also points out that in addition to carbohydrates, both protein and fat can sometimes raise insulin levels. For me the most important information in this book is the absolute importance of separating the glucose response from the insulin response to eating. The other important take home message that hit my brain like a sledgehammer is the issue of timing of meals. I hate to say it but until I read this book I never gave the issue of timing of meals much thought. Dr. Fung weaves a fascinating tale about how the timing of eating is the key to reversing insulin resistance. He outlines how intermittent fasting can be easily incorporated into any treatment program to manage common metabolic problems. I should have figured this one out on my own. When I married my Greek wife I also joined the Greek Orthodox Church and as he points out these folks are the masters of intermittent fasting. And by the way, don’t make the mistake of measuring your progress by weight loss alone. There really is no such thing as a “weight problem”. Obesity is defined as excessive body fat so the most accurate way to measure progress is by measuring body composition. Because this type of measurement is not easily available to many people, I recommend keeping tabs on your waist measurement at your belly button. You can also get a rough idea how you are doing by how your cloths fit. If you are noticeably shrinking you are likely losing fat even if the scale isn’t changing much. To summarize, all I can say is if you want to be healthy in today’s world loaded with endless amounts of toxic fake food, you need to read this book. And if like me you also want to read the second best book out there related to diet and health, re-read “The Obesity Code”. It’s so chock full of great information that it’s almost impossible for all of it to sink in on the first read.

Jason Fung is a doctor with a fire in his belly. I came across Jason’s work in January 2015 after watching his How to Reverse Diabetes Naturally video which has now had more than 600,000 views. Jason’s primary thesis is that constantly elevated levels of insulin lead to insulin resistance which causes obesity and a host of metabolic issues. Jason says that fasting, not more medication, or even a low carb diet, is the most aggressive way to reverse insulin resistance. Jason has developed a significant following in a short amount of time due to the fact that he has joined a few fundamental dots when it comes to diabetes, weight loss and insulin. He also doesn’t pull any punches when it comes to communicating the message that people who are producing too much insulin due to hyperinsulinemia and obesity probably don’t need any more insulin. You may think of Jason as ‘that fasting guy who says insulin is bad’ however his work is much more extensive and comprehensive. Inspired by a hunger to understand the situation and how he can help his patients, he created a massive six-part six hour Etiology of Obesity series and an extensive blog for his patients. The Etiology of Obesity series on YouTube is not just about insulin or fasting. It’s a comprehensive review of a plethora of relevant research and theories in the areas of nutrition, weight loss and obesity. But why has a busy nephrologist (kidney specialist) gone to all this effort when he could be making a lot more money treating sick people? It seems he got fed up with treating symptoms and wanted to start addressing the upstream root cause of the diseases that his patients were suffering with. Jason’s new book The Obesity Code is not just about fasting, it’s about the full etiology (causation or origin) of obesity. He has done an excellent job of setting out the multiple facets how obesity develops so we can gain a better understanding of what we can do to remedy that will work in the long term. If there’s one drawback of his videos and previous work, it’s that the production quality of the lectures for his patients don’t do justice to quality of the content. Jason’s new book, The Obesity Code is a polished, professional product that sets out all the research that’s gone into his videos and blog in one cohesive, comprehensive piece of work. There are many factors that affect our metabolic health and lead to obesity. Jason delves into each one and joins the dots between them. - In chapter two Jason talks about the genetic factors that influence insulin resistance. - In chapter three he talks about how the body adapts to energy restriction and thwarts our weight loss endeavours. - In chapter four he talks about how exercise makes us hungry and also doesn’t reliably lead to weight loss. - He talks about how we are educated by food marketing to eat all the time, thus keeping insulin and blood glucose levels high. And on he goes though insulin, cortisol, the pros and cons of low carb, hyper palatable foods etc etc etc. In the end you need to address the thermostat, or the set point, which is controlled by the master hormone insulin. Intermittent fasting is the most effective way to lower insulin and restore insulin sensitivity. Jason covers a wide range of topics thoroughly, logically and with extensive research and references. This is practically a textbook on the different facets of the subject that is easy to read and engaging for the educated layman. It was Jason’s observation about the food insulin index, and the effect of protein and fibre that, after watching his video series, sent me down the rabbit hole to develop the concepts of ‘insulin load’ and ‘percentage of insulinogenic calories’. I wanted to formularise them to see how we could apply them to identify foods that would reduce insulin. Go buy the book. Enjoy! Marty Kendall OptimisingNutrition.com

The Obesity Code is a game-changer for anyone struggling to understand weight loss. Dr. Jason Fung breaks down complex science in a way that’s clear, engaging, and surprisingly easy to follow. What sets this book apart is its focus on the hormonal causes of obesity, particularly insulin, and why traditional calorie-counting approaches often fail. I especially appreciated the practical guidance on intermittent fasting—not as a fad, but as a scientifically backed tool to reset metabolism and improve overall health. The book is packed with actionable strategies, real-world examples, and insights that challenge conventional wisdom without being preachy. Whether you’re just starting your health journey or have been battling weight for years, this book provides both understanding and hope. It’s informative, empowering, and has completely changed the way I approach food and fasting. Highly recommended!

Best book about obesity, diet and overall health I've read...ever. It introduces scientific concepts in an easy way, such as everyone can understand it (I'm not in the health sector and I had no problem understanding what was being said). Buy it if you can

I'm shocked by how brainwashed we have been, Dr Jason proves that obesity is NOT a caloric imbalance. It's a hormonal imbalance and it's a multifactorial disease. I recommend it!

Zeer goed boek Leuk geschreven en een eye opener

Excellent book for anyone looking to lose weight and potentially solve health issues. Easy to read, but explains diabetes and obesity very thoroughly. A must-read!

I have heard of Dr Fung from fasting podcasts I listen to, he's certainly an authority on that matter. The book reads easy as it combines science with entertaining historical data. I will purchase the Cancer Code next. Highly recommend this author to anyone who wants to "hack" their insulin sensitivity, get healthier, and rationalize the WHY's of weight loss difficulties.