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The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally: Summary & Key Insights

by Dr. Jason Fung

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About This Book

In this book, Dr. Jason Fung explains the underlying causes of type 2 diabetes and presents a natural, evidence-based approach to prevent and reverse the disease. He challenges conventional medical views that treat diabetes as a chronic and progressive condition, advocating instead for dietary changes and intermittent fasting to restore metabolic health.

The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

In this book, Dr. Jason Fung explains the underlying causes of type 2 diabetes and presents a natural, evidence-based approach to prevent and reverse the disease. He challenges conventional medical views that treat diabetes as a chronic and progressive condition, advocating instead for dietary changes and intermittent fasting to restore metabolic health.

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Key Chapters

When we look around the world today, the numbers are staggering: hundreds of millions afflicted by type 2 diabetes, and those figures continue to climb every year. This explosion cannot be explained merely by genetics. What changed is our environment — particularly how and what we eat. Over the past few decades, food has become more processed, meals more frequent, and sugar intake astonishingly high. Meanwhile, the medical community has focused on treating symptoms rather than addressing root causes.

Despite massive public health campaigns and countless medications, the global diabetic population keeps growing. Why? Because conventional treatments do not cure diabetes; they only mask its effects. We measure success by lowering blood glucose temporarily, but glucose is only one piece of the puzzle. The deeper issue is insulin resistance — the inability of cells to respond properly to insulin, leading the body to produce ever more. It’s as if we keep trying to shout louder to make deaf ears hear. Eventually, even shouting doesn’t work. The tragic irony is that injectable insulin, the standard therapy, often worsens the problem. Instead of healing, patients become trapped in a vicious cycle of higher dosages and declining health.

In my view, this epidemic is not inevitable. It is man-made, driven by our misguided understanding of nutrition. Diabetes is not a contagious disease; it is the consequence of chronic hormonal imbalance, one we can correct once we truly understand its language.

To understand diabetes, we must first understand insulin. Imagine insulin as the key that unlocks your cells so glucose can enter and be used for energy. When insulin levels rise, glucose moves into cells, and blood sugar falls. When insulin drops — such as during fasting — stored energy is mobilized, and your body burns fat. This rhythm of insulin rising and falling used to occur naturally in humans, but modern eating patterns have disrupted it completely.

The problem begins when insulin stays elevated for too long. Eating all day, consuming refined carbohydrates, and drinking sugary beverages keep insulin levels persistently high. Over time, the cells stop responding to insulin effectively — they become resistant. To compensate, the pancreas produces even more insulin to achieve the same effect. The outcome is predictable: weight gain, fatigue, and eventually, type 2 diabetes. In essence, diabetes isn’t just about having too much sugar in the blood; it’s about having too much insulin everywhere.

Once we frame it this way, the path forward becomes clearer. Lowering insulin — not merely blood glucose — should be our primary goal. And the most powerful tools to do that come from natural human behavior itself: reducing carbohydrate intake and allowing our bodies time without food so insulin can fall. This is where fasting, something encoded in our biology, proves its healing power.

+ 3 more chapters — available in the FizzRead app
3The Calorie Myth
4Intermittent Fasting as a Solution
5Long-Term Lifestyle Strategies

All Chapters in The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

About the Author

D
Dr. Jason Fung

Dr. Jason Fung is a Canadian nephrologist and a leading expert on intermittent fasting and low-carbohydrate diets. He is the author of several bestselling books on obesity and diabetes, including The Obesity Code and The PCOS Plan. His work focuses on the role of insulin and nutrition in chronic disease management.

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Key Quotes from The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

When we look around the world today, the numbers are staggering: hundreds of millions afflicted by type 2 diabetes, and those figures continue to climb every year.

Dr. Jason Fung, The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

To understand diabetes, we must first understand insulin.

Dr. Jason Fung, The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

Frequently Asked Questions about The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally

In this book, Dr. Jason Fung explains the underlying causes of type 2 diabetes and presents a natural, evidence-based approach to prevent and reverse the disease. He challenges conventional medical views that treat diabetes as a chronic and progressive condition, advocating instead for dietary changes and intermittent fasting to restore metabolic health.

More by Dr. Jason Fung

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