Summary & Study Guide - The Diabetes Code - Lee Tang - ebook

Prevent and Reverse Type 2 Diabetes Naturally The must-read summary of “The Diabetes Code: Prevent and Reverse Type 2 Diabetes Naturally,” by Dr. Jason Fung.” Most doctors consider type 2 diabetes to be a chronic and progressive disease. The Diabetes Code explains the underlying cause of type 2 diabetes and reveals how it can be prevented and also reversed using natural dietary methods instead of medications. In The Diabetes Code, Dr. Jason Fung explains why conventional treatments that rely on insulin or other blood-glucose-lowering drugs can exacerbate the problem leading to significant weight gain and even heart disease. He explores the underlying cause of type 2 diabetes and gives an easy-to-follow solution to preventing reversing type 2 diabetes by addressing the root cause. This guide includes: Book Summary—The summary helps you understand the key ideas and recommendations. Online Videos—On-demand replay of public lectures, and seminars on the topics covered in the chapter. Value-added of this guide: Save time Understand key concepts Expand your knowledge Get this book. It teaches you everything you need to know about how to prevent and reverse type 2 diabetes without medications.

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Summary &Study Guide

The Diabetes Code

Prevent and Reverse Type 2 Diabetes Naturally

Lee Tang

Title: Summary & Study Guide - The Diabetes Code

Subtitle: Prevent and Reverse Type 2 Diabetes Naturally

Author: Lee Tang

Publisher: LMT Press (

Cover Image: Alpha Stock Images

Copyright © 2018 by Lee Tang

All rights reserved. Aside from brief quotations for media coverage and reviews, no part of this book may be reproduced or distributed in any form without the author’s permission. Thank you for supporting authors and a diverse, creative culture by purchasing this book and complying with copyright laws.

First Edition: August 2018

Issued in print and electronic formats.

ISBN: 9781988970141 (ebook)

ISBN-13: 9781723518263 (paperback)

ISBN-10: 1723518263 (paperback)

Limit of Liability/Disclaimer of Warranty: The publisher and author make no representations or warranties regarding the accuracy or completeness of these contents and disclaim all warranties such as warranties of fitness for a particular purpose. The website addresses in the book were correct at the time going to print. However, the publisher and author are not responsible for the content of third-party websites, which are subject to change.

To my wife, Lillian, who is the source of energy and love for everything I do, and to Andrew and Amanda: watching you grow up has been a privilege.


For a complete list of books by Lee Tang and information about the author, visit Lee Tang’s site.


Title Page



Books by Lee Tang


How to Reverse and Prevent Type 2 Diabetes

Part One: The Epidemic

1. How Type 2 Diabetes Became an Epidemic

2. The Differences Between Type 1 and Type 2 Diabetes

3. The Whole Body Effect

Part Two: Hyperinsulinemia and Insulin Resistance

4. Diabesity

5. The Role of Insulin in Energy Storage

6. Insulin Resistance_ The Overflow Phenomenon

Part Three: Sugar and the Rise of Type 2 Diabetes

7. Diabetes, A Disease of Dual Defects

8. The Fructose - Insulin Resistance Connection

9. The Metabolic Syndrome Connection

Part Four: How Not to Treat Type 2 Diabetes

10. Insulin

11. Oral Hypoglycemics

12. Low-Calorie Diets and Exercise

Part Five: How to Effectively Treat Type 2 Diabetes

13. Lessons from Bariatric Surgery

14. Carbohydrate-Reduced Diets

15. Intermittent Fasting


About the Author

Plea from the Author


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

Book Abstract

In this book, Dr. Jason Fung explains the underlying cause of type 2 diabetes and reveals how it can be prevented and reversed using natural dietary methods instead of medications. He explains why conventional treatments that rely on insulin or other blood-glucose-lowering drugs can exacerbate the problem leading to significant weight gain and even heart disease. The book gives an easy-to-follow solution to preventing and reversing type 2 diabetes by addressing the root cause.


Dr. Jason Fung completed medical school at the University of Toronto and a fellowship in nephrology at the University of California. He is one of the world’s leading experts on fasting for weight loss and diabetes reversal. He founded the Intensive Dietary Management Program in Toronto that provides a unique treatment focus for type 2 diabetes and obesity.

Important Note About This Guide

This guide is a summary and not a critique/review of the book. The summary may not be organized chapter-wise but summarizes the book’s main ideas, viewpoints, and arguments. It is NOT meant to be a replacement, but a supplement to help you understand the book’s key ideas and recommendations.


The Quick Start Guide

Type 2 diabetes is a disease caused by too much insulin in our body when we eat too much sugar.

When you eat sugar, the glucose level in the blood rises. Your body secretes the hormone insulin to help move the glucose out of the bloodstream into the cells for energy. When you eat too much sugar, the insulin level in your blood will be constantly high. Chronically elevated blood insulin levels cause insulin resistance, a condition in which the cells fail to respond to insulin to move the blood glucose into the cells, leaving excess glucose in the blood. In response to the excess glucose in the blood, the body secretes even more insulin. More insulin in the blood causes even more insulin resistance, perpetuating the vicious cycle. When the insulin levels can no longer keep pace with the rising resistance, your blood glucose level will be constantly high — a primary symptom of type 2 diabetes.

Insulin resistance causes most of the modern chronic illnesses, including obesity, type 2 diabetes, fatty liver, Alzheimer’s disease, heart disease, and cancer.


Conventional treatments that rely on insulin or other blood-glucose-lowering drugs do not rid the body of excess glucose. They just take the glucose out of the blood and ship it to other organs, such as the kidneys, the nerves, the eyes, and the heart. Over time, this can lead to serious illnesses such as blindness, kidney failure, fatty liver disease, cirrhosis, diabetic foot ulcers, diabetic neuropathy, and Alzheimer’s disease. Standard medications do not prevent organ failure because they do not rid the body of the toxic sugar load.


Because the underlying cause of type 2 diabetes is too much sugar in the body, the solution is to get rid of the sugar. Here are two steps to accomplish this without medication or surgery.

Step 1: Put Less Sugar In

Eliminate all sugar and refined carbohydrates from your diet. Limit or eliminate bread and pasta made from white flour, white rice, and potatoes.

Maintain a moderate, not high, intake of protein. You need protein for good health, but your body cannot store excess protein so the liver converts them into glucose. So avoid processed, concentrated protein sources such as protein shakes, protein bars, and protein powders.

Eat a diet high in natural fat, such as those found in avocados, nuts, and olive oil. Eggs and butter are also excellent sources of natural fat. The dietary cholesterol in these foods is not harmful to the human body.

Step 2: Burn off Remaining Sugar

Exercise can benefit type 2 diabetes, but it is far less powerful at reversing the disease. Fasting is the simplest method to force your body to burn sugar. A popular strategy is to fast for 24 hours two to three times per week. Another popular approach is to fast for 16 hours five to six times per week.





Diabetes has been around for thousands of years. The ancient Egyptian medical text, Ebers Papyrus, first described the condition of “passing too much urine” around 1550 BC. In 250 BC, the Greek physician Apollonius of Memphis called the condition diabetes, which meant excessive urination. For centuries, the classic diagnostic test for diabetes was to taste the urine for sweetness. In 1776, the English physician Matthew Dobson discovered sugar was causing the sweetness.

In 1797, after observing the substantial improvement in a diabetic patient eating an all-meat diet, the Scottish military surgeon John Rollo formulated the first low-carbohydrate diet to treat diabetes.

In 1889, Dr. Josef von Mering and Oskar Minkowski at the University of Strasbourg discovered a dog with its pancreas removed exhibited the symptoms of diabetes. Sir Edward Sharpey-Schafer proposed in 1910 that diabetes was caused by the deficiency of a hormone produced in the pancreas. He called the hormone insulin.

Based on the observation of periodic starvation during the 1870 Franco-Prussian War, the French pharmacist and hygienist Apollinaire Bouchardat established his own therapeutic diet, which forbade all foods high in sugars and starch for diabetes patients.

By the early 1900s, American physicians Frederick Madison Allen and Elliott Joslin became strong proponents of intensive dietary management for diabetes. They prescribed the “Allen starvation treatment,” which was low in calories (1000 calories per day) and restricted in carbohydrates (<10 g per day). A lack of understanding of the difference between type 1 and type 2 diabetes hampered the usefulness of their treatments. But they were the best therapy until the discovery of insulin in 1921.

Frederick Banting, Charles Best, and John Macleod discovered insulin at the University of Toronto. With this discovery, insulin treatment overshadowed the dietary treatments of the previous century. People believed insulin injection can cure diabetes. But it soon became clear that not all diabetes is sensitive to the effects of insulin. Physicians call the insulin-dependent diabetes type 1 diabetes and the non-insulin-dependent diabetes type 2 diabetes.


Since the 1950s, people believed dietary fat causes heart disease because it increases blood cholesterol levels. So physicians advocated lower-fat diets.

In 1980, the U.S. government published Dietary Guidelines for Americans, recommending people to:

Increase carbohydrate consumption to 55–60 percent of calories; and

Decrease fat consumption to 30 percent of calories.

The guidelines also spawned the infamous food pyramid. The foods we were told to eat every day — included bread, pasta, and potatoes — were the precise foods we had previously avoided to stay thin. They are also the foods that provoke the greatest rise in blood glucose and insulin. This unproven low-fat, high-carbohydrate diet resulted in the immediate increase in obesity, followed by the rise in diabetes ten years later.


According to the 2016 World Health Organization global report on diabetes, the number of diabetics worldwide had quadrupled since 1980. Diabetes has exploded in both sexes, every age group, every racial and ethnic group, and all education levels. Rates of diabetes are rising fastest in the low- and middle-income nations of the world.

China is a diabetes catastrophe. The number of Chinese adults with type 2 diabetes had jumped from 1 percent in 1980 to 11.6 percent in 2013.

In the US, 14.3 percent of adults have type 2 diabetes and 38 percent of the population has prediabetes, totaling 52.3 percent. This means that more people have the disease than not.

In the 19th century, most diabetics were type 1. Type 2 diabetes was rare. By 2016, type 1 diabetes accounts for less than 10 percent while type 2 diabetes dominates.