22 min 38 sec

The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

By Jason Fung

The Diabetes Code challenges conventional wisdom on type 2 diabetes, presenting it as a reversible condition. By targeting insulin resistance through dietary changes and intermittent fasting, health can be restored naturally without lifelong medication.

Table of Content

Imagine a health crisis so vast that it touches nearly 400 million lives across the globe. In the United States alone, tens of millions of people are grappling with a diagnosis that is often presented as a life sentence: type 2 diabetes. For decades, the prevailing medical narrative has suggested that once you have this condition, your only option is to manage the symptoms, typically through a lifetime of medication and increasing doses of insulin. But what if that narrative is missing the most important piece of the puzzle? What if the very treatments we’ve been relying on are actually making the underlying problem worse?

In The Diabetes Code, we are invited to look at the disease through a different lens. The central premise is that type 2 diabetes is not a mysterious, uncontrollable force, but rather a predictable result of our modern environment and dietary habits. Specifically, it is a disease of insulin resistance—a condition where the body is essentially drowning in its own hormones. When we understand that the root cause is an excess of insulin, it becomes clear why adding more insulin via injections might not be the answer we’ve been looking for.

This summary will guide you through the metabolic landscape of the human body. We will explore how our dietary choices, particularly our consumption of processed sugars and carbohydrates, lead to a congested liver and a broken metabolic switch. We will also look at the historical and scientific evidence that suggests we can do more than just manage this condition; we can actually reverse it. By shifting our focus from calories to hormones and from constant eating to strategic periods of fasting, we can find a path back to health. The goal here is a practical, science-backed plan that empowers you to take charge of your body’s internal chemistry, offering a natural way to fight back against a modern epidemic.

Explore the fundamental differences between type 1 and type 2 diabetes to understand why standard treatments for one can be detrimental to the other.

Discover why the connection between obesity and diabetes is driven by hormones rather than just a simple tally of calories consumed.

Uncover the biological process that turns a healthy liver into a fatty one, creating a dangerous cycle of metabolic decline.

Learn why not all sugars are created equal and how the specific way the liver processes fructose makes it a primary driver of disease.

Examine the counterintuitive evidence showing that treating type 2 diabetes with insulin injections can actually increase health risks.

Understand how the success of bariatric surgery reveals a natural path to reversing diabetes without the need for an operation.

Explore the two-pronged dietary approach that targets the root causes of insulin resistance by eliminating refined triggers.

Discover why strategic periods of not eating are more effective for hormonal health than traditional portion control.

As we reach the end of this journey through the metabolic science of type 2 diabetes, the primary takeaway is one of profound hope. We have seen that this condition is not an inevitable decline or a permanent failure of the body. Instead, it is a reversible state driven by a hormonal imbalance—specifically, the chronic elevation of insulin. By understanding that the disease is essentially a problem of ‘too much’ (too much sugar and too much insulin), the solution becomes clear. We must stop the intake of the culprits and give our bodies the time and space they need to clear the excess.

The path forward involves a fundamental shift in how we relate to food. It’s about moving away from the toxic, hidden sugars and the refined carbohydrates that have become so ubiquitous in our modern world. It’s about embracing the natural, ancient rhythm of feast and famine through intermittent fasting, allowing our insulin levels to drop and our cells to become sensitive once again. This approach doesn’t require expensive gadgets or complicated pharmaceutical regimens; it requires a return to biological common sense.

Ultimately, the ‘code’ to breaking free from type 2 diabetes is found in your own lifestyle choices. You have the power to influence your body’s hormonal environment every time you decide what to put on your plate and when to give your digestive system a break. By focusing on the root cause—the insulin—rather than just the symptom of high blood sugar, you can embark on a journey toward true metabolic health. The road to recovery is open, and it begins with the understanding that your body has an incredible capacity to heal itself if you simply provide it with the right conditions. Take this knowledge, experiment with what works for your life, and reclaim the vibrant health that is your natural state.

About this book

What is this book about?

The Diabetes Code explores the underlying causes of the global type 2 diabetes epidemic, moving beyond the simple focus on blood sugar to address the root issue: insulin resistance. It explains how modern diets, heavy in refined carbohydrates and sugars, overwhelm the body’s hormonal systems and lead to chronic illness. The book posits that the standard medical approach—treating type 2 diabetes with more insulin—is fundamentally flawed because it ignores the fact that the disease is actually caused by an overabundance of the hormone. Listeners will discover a roadmap for regaining metabolic health. The book details the biological mechanisms of fatty liver disease and the toxic impact of fructose. More importantly, it provides a practical framework for reversing the condition through strategic nutritional choices and intermittent fasting. By understanding the body’s hormonal responses to food and periods of non-eating, individuals can take control of their health, reduce weight, and potentially eliminate the need for expensive, invasive interventions.

Book Information

Rating:

Genra:

Health & Nutrition, Science

Topics:

Healthy Eating, Longevity, Metabolism, Nutrition, Weight Loss

Publisher:

Greystone Books

Language:

English

Publishing date:

April 3, 2018

Lenght:

22 min 38 sec

About the Author

Jason Fung

Jason Fung is a distinguished medical professional and leading expert in the fields of nutrition, obesity, and type 2 diabetes management. He is widely recognized for his advocacy of fasting as a legitimate and effective therapeutic tool for metabolic disorders. Beyond his clinical work, Fung is a prolific writer whose articles have appeared in prominent publications such as the Daily Mail and the Atlantic. He is also a frequent contributor to Fox News and authored the bestselling book The Obesity Code in 2016.

Ratings & Reviews

Ratings at a glance

4.6

Overall score based on 264 ratings.

What people think

Listeners find this guide to diabetes highly accessible and thoroughly researched, presenting clear scientific data that assists them in managing and understanding their health. The content is easy to digest, especially for laypeople, and offers practical strategies. Listeners mention substantial results regarding blood sugar control and weight reduction, with one listener noting their BMI dropped from obese to overweight. Characterizing the book as life-changing, listeners explain that it encouraged them to focus on their well-being and saved their lives.

Top reviews

Takeshi

Finally found a resource that treats type 2 diabetes like the dietary disease it actually is rather than a progressive death sentence. For years, I watched my father follow the standard medical advice—taking his insulin, eating his 'healthy' carbs—only to watch his health enter a brutal downward spiral. Dr. Fung explains with crystal-clear logic why adding more insulin to a body already overflowing with sugar is like trying to put out a fire with gasoline. The realization that this condition is reversible through fasting and carb restriction was a massive weight off my shoulders. I followed the protocols for just four months and watched my fasting glucose drop from 115 down to 88. It works. The technical explanations of hormonal pathways might be a bit dense for some, but for me, they provided the 'why' I had been missing for over a decade. This isn't just another diet book; it’s a blueprint for taking your life back from a system that seems content to just manage your decline.

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Ern

The science behind insulin resistance is presented here in a way that just makes sense, even for someone without a medical degree. I previously believed that a calorie was just a calorie, but Fung totally dismantled that myth by showing how our bodies react differently to broccoli versus pasta. Truth is, I was terrified of the complications like blindness or kidney failure that run in my family, and this book provided a path out of that fear. My BMI has already shifted from the obese category into merely overweight, and for the first time in years, I don't feel like a slave to my next snack. The emphasis on intermittent fasting was a bit intimidating at first, but once you understand the biology, it becomes much easier to implement. I’m incredibly grateful for the practical advice on natural fats. It’s a life-changing read that I’ve already recommended to three people in my support group.

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Madison

Wow, what a wake-up call this was for my entire family. I’ve been on a health kick lately, trying to undo the damage of years of processed food, and Fung’s writing style really drove the point home. He doesn’t sugarcoat the reality of T2D complications, and honestly, that’s exactly what I needed to hear. The section on how the liver becomes 'clogged' with fat was a lightbulb moment for me. While the author does use some pretty eccentric metaphors—comparing things to Rocky Balboa or grizzly bears—the core message remains powerful and scientifically grounded. I’ve shifted my eating habits to a more Mediterranean-style approach with limited windows of eating, and the energy levels I have now are night and day compared to six months ago. If you are pre-diabetic or just want to understand how your metabolism actually functions, you need to pick this up immediately.

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Nan

This book put the fear of God in me regarding what happens if you don't take insulin resistance seriously. Dr. Fung strips away the medical jargon and exposes the flaws in how we currently treat this disease. It’s simple. We are over-prescribing insulin for a problem caused by too much insulin. It’s like trying to cure an alcoholic by giving them more booze. I followed the intermittent fasting advice and my results have been nothing short of miraculous. My fasting glucose went from 101 to 85 in less than a year. No more brain fog. No more mid-afternoon crashes. This should be required reading for every GP in the country. It’s a shame that so much of our medical industry is built on treating symptoms rather than fixing the underlying dietary cause. This book saved my health.

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Thanit

After struggling with prediabetes for years, I finally feel like I have a handle on my health thanks to this book. I’ve spent thousands on different programs, but Fung’s explanation of the hormonal basis of weight gain was the first thing that actually clicked. I love all the specific studies he cites, even if some of the science talk gets a bit heavy in the middle chapters. It’s not just about what you eat, but when you eat. That distinction has made all the difference for me. I’ve adopted a low-carb, high-natural-fat routine and the weight is just falling off without me feeling like I’m starving. To be fair, you have to be disciplined to make it work, but the results are undeniable. My last blood panel was the best I’ve had in twenty years. This is a must-read for anyone serious about longevity.

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Dao

Dr. Fung makes a compelling case for why our current medical approach is backwards and potentially dangerous. Using insulin to treat a disease of insulin resistance is logically inconsistent, and this book explains why with great clarity. I was particularly interested in the discussion on how different foods affect the liver. I’ve switched to a diet rich in avocados, nuts, and olive oil while cutting out the refined grains I used to rely on. The results were almost immediate. My blood sugar stabilized, and the constant hunger I used to feel has completely vanished. It’s empowering to realize that you aren't just a victim of your genetics. You can actually change your biology through the choices you make at the dinner table. This book is a beacon of hope for anyone tired of the 'progressive' nature of T2D.

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Pensuda

If you’ve already read 'The Obesity Code,' you might find some of the material here a bit repetitive since the two books share a lot of the same DNA. That being said, this is still an excellent deep dive into the specific mechanics of type 2 diabetes. Dr. Fung is a master at debunking the 'calories in, calories out' model which has failed so many people for so long. I do think the book could have been about fifty pages shorter if he didn't repeat the same points about insulin levels quite so often. However, the 'Quick Start' guide at the end is worth the price of admission alone. It’s practical, no-nonsense, and avoids the fluff you find in most wellness books. I’m currently down 20 pounds and my doctor is actually talking about reducing my medication. It’s a solid 4-star read that offers real hope where the standard medical establishment usually only offers more prescriptions.

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Tan

Look, the central message is vital, but the writing style is... unique, to say the least. The author loves a good simile, and while some are funny, others are just plain weird, like comparing a lack of weight loss to humility in a grizzly bear. It can be a little distracting when you're trying to absorb serious medical information. Beyond the quirks, the core argument about fatty liver and insulin resistance is incredibly compelling and well-researched. I appreciate that he challenges the 'low fat' dogma that dominated the 90s and clearly isn't working for the general population. It's a bit long-winded in the middle sections and repeats the same conclusions multiple times, but the information is too important to ignore. I’m definitely a believer in the fasting protocol now. I just wish the editing had been a bit tighter to make the reading experience smoother.

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Muk

As someone who has seen the ravages of this disease first-hand, I found this book to be both terrifying and inspiring. The author explains that obesity and diabetes are essentially two sides of the same coin, which was a real eye-opener for me. While he admits that some people can be diabetic without being obese, the link he establishes is very strong. Gotta say, the intermittent fasting part was a tough sell at first, but it really is the most effective way to burn off stored glucose. My only real gripe is that he relies quite heavily on Occam's Razor to prove his theories, which feels a bit like a shortcut in a scientific text. Still, the practical results I've seen in my own life are hard to argue with. I feel better, look better, and my lab results finally look normal. It's an essential guide for the modern era.

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Javier

Not to be a total skeptic, but I found the endorsements in this book incredibly problematic and scientifically questionable. When I saw Steven Gundry and Nina Teicholz on the cover, my alarm bells started ringing immediately given their controversial reputations in the nutrition world. Frankly, Fung’s definition of 'reversing' diabetes seems to be nothing more than a clever way of saying 'avoiding carbs so you don’t need a shot.' If you eat a piece of fruit and your blood sugar spikes, you are still diabetic! I much prefer the approach in 'Mastering Diabetes,' which focuses on restoring the body's actual ability to process carbohydrates through a plant-based, low-fat lifestyle. This book promotes a high-fat, animal-based diet that many studies link to increased heart disease and other chronic issues. It feels more like a manifesto for the ketogenic crowd than a balanced medical guide. I wouldn't trust the 'science' here without doing a lot of outside research first.

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