The Diabetes Code

//The Diabetes Code

I’m happy to announce that my latest book, The Diabetes Code will be released on April 3rd, which is a follow on to The Obesity Code but with information specific for reversing and preventing type 2 diabetes. As with all my books, all the information in the book has already been covered in my regular blog posts – here on my site or on Since the infomration is free for everybody, why buy the book? The added cost comes with a publisher, which have publishing, distribution and other costs. An editor and I spent a lot of time editing and refining the material closely to make sure it is easy to understand and logical to follow. So with the book, the information is easier to find, easier to follow and laid out in more logical manner. If you want to dig through all the old posts, though (41 in total), you will get all the information.

To give you an idea of the process, I usually write my online blog pretty much exactly as I would say it. There’s not a lot of editing, other than occasionally deleting the profanities, and sometimes adding them in. I also take out some of the most sarcastic snarky stuff. However, the posts are hard to navigate, and a little repetitive at times. So, for The Diabetes Code, it took me about a year to go from the raw material of blog posts, to a manuscript that I could send to a professional editor. She looked it over, changed some stuff to make things clear and then sent it back to me to be redone. I did this 7 times for The Diabetes Code. I did the same thing in The Obesity Code, too. After that, it went to a copy editor for 2 more edits to fact check everything. In all the editing process alone took another 8 months. So from the raw blog posts to finished manuscript is about 1 year, 8 months. Then it gets packaged all together with some nice pictures and published. I was privileged to have Nina Teicholz, the author of The Big Fat Surprise write the foreword, and she did an amazing job. Dr. David Unwin, clinical expert in diabetes in the UK, shares his experiences with diabetes reversal. The end result is something that I’m proud to release.

One question some people have asked is “What new information is in The Diabetes Code that isn’t in The Obesity Code or The Complete Guide to Fasting?” Well, almost everything. People get confused because they’ve read the same stuff on my blog and then complain that there’s no new material in the book. That’s the point. I don’t hold any information back that may help you, the reader, simply to sell a few books. The information is already all out there, free but it’s written better.

In The Obesity Code, I only covered obesity and really did not even mention type 2 diabetes. That was deliberate, because there is so much information that it would be impossible to cover in a single volume. Nevertheless, if you read The Obesity Code and then followed along on the blog, you would have gotten enough information to successfully reverse type 2 diabetes. And many readers did just that, which is fantastic. If you, however, go over The Obesity Code carefully, though, you will notice that there is almost no mention of type 2 diabetes.

Table of Contents

The Diabetes Code covers different ground in that it focuses specifically on the disease of type 2 diabetes and its relationship with obesity. I focus on visceral obesity and also the problem of insulin resistance, how to conceptualize insulin resistance, what it is, and how to treat it. I write more extensively about the dangers of added sugars and cover the basics of medications for type 2 diabetes and why they are not successful at reversing disease. I cover type 1 diabetes and ‘double’ diabetes. All of these topics were not mentioned at all in The Obesity Code.

I see The Diabetes Code as a sort of extension of The Obesity Code, but for the 50% of the adult population of the United States that have pre-diabetes or frank type 2 diabetes. It is more detailed in nature, and I would generally suggest that readers look at The Obesity Code first, although not absolutely necessary.

I’ve included some patient stories and also some sample meal plans to get people started, but if you want a more in-depth discussion about fasting, then I would refer readers to The Complete Guide to Fasting.

I’ve also written an Afterword sharing my thoughts on this entire process of discovery, which I did not do in The Obesity Code, because that was only the first volume, in my mind. I’ll end this post with the first few paragraphs of that afterword.

Despite the title of this book and its in-depth exploration of type 2 diabetes, it may surprise you to learn that I do not truly consider this book to be about diabetes. “What?” I can hear you protesting. “Almost every word in this book discusses diabetes!” No, my friend, this book is truly about hope.

I hope we can eradicate type 2 diabetes within a generation. I hope we can erase all the diseases associated with metabolic syndrome. I hope we can recover all the associated costs, both in dollars and human suffering. I hope we can accomplish these goals without drugs and without surgery, using only knowledge as our weapon.

2018-04-04T06:37:51+00:00 28 Comments

About the Author:

Dr. Fung is a Toronto based kidney specialist, having graduated from the University of Toronto and finishing his medical specialty at the University of California, Los Angeles in 2001. He is the author of the bestsellers ‘The Obesity Code’ and ‘The Complete Guide to Fasting’. He has pioneered the use of therapeutic fasting for weight loss and type 2 diabetes reversal in his IDM clinic.

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28 Comments on "The Diabetes Code"

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Hi Jason, I figured the book would probably contain mostly information already available on your blogs but I bought it anyway as my way of supporting you and your work and saying thank you for all that you do!


Good for you Mary, I’ll be doing the same.

Isabel Caceres
Dear Dr. Fung, Congratulations on your new book which I will purchase in the next few days!!! You are very generous by sharing your discoveries and knowledge regarding diabeties with all of us. I’m personally very grateful after reading your first book I lost weight (33lbs) and went off insulin (84 units which I took for 6 1/2 years) the Spring 2016. I’m not presentely completely diabetes free as I take a small amount of medication (NO insulin) but I feel so much better. I have to thank you from the bottom of my heart for sharing your knowledge in… Read more »
Stephan O

A well-deserved “Congratulations”!

Thank you for your tremendous efforts in this field, and for your candor about the process of publishing your book. Now go take a vacation or something!


Wonderful! I’ve been waiting over a year for this one (you hinted at a long time ago). I buy your books to give away to share your knowledge in an easy to read organized format.


Hello Dr. Fung!!
The forward speaks to me personally! I met you in San Diego after reading the Obesity Code and you’ve given me that hope you speak of in your forward. I listen to you on you-tube as well, but it only renews my mind, helps me stay focused! There is nothing like reading, highlighting and making notes in a book! Thank you for all you do in trying to help so many be well and live quality lives! I love you and your work! Peace+Blessings!


Thank you for continuing to freely share life saving information. I received my book this week and I am enjoying it as much as I did TOC. In chapter three where you describe the problems T2 diabetics can expect is a very powerful chapter. It should be required reading for anyone diagnosed w/T2 or insulin resistance. Thank you Dr. Fung.


My copy is scheduled for delivery today. The book format definitely brought your blog posts on obesity into a cogent organized form. It was easier for me to assimilate and refer to. I am expecting ‘The Diabetus Code’ to be well organized and easy to use also. Your afterword was spot on. Thanks for what you do.


I love the 1st couple of paragraphs of the Afterword. Fnding your work was definitely the hope I needed!! Thank you for writing this book!

Pam Forrester

Congratulations and Thank you for all of the knowledge you share for free. I bought 4 books for my brother and friends recently diagnosed with diabetes.


love the stories about patients!


Awsome! I have some loved ones that are struggling and thoroughly confused about what to do. I will be getting one for myself and 4 more to give away. I call The Obesity Code my health Bible–looks like I just found the New Testament. 😉


I pre ordered on Amazon and received it day of. Having read all the blogposts, I am not expecting to find all new information in there – but have to support the Jedis of Fasting and Metabolic Health👍

Katrina M Iannuzzi

Thank you Dr fung phenomenal work!


Hi Jason, thanks for all your hard work and sharing it with us!
I know this is just coming out, but do you have any time frame yet on when you will have it translated into Spanish? I have some T2D in-laws that could really use to read this. I know you already have the Obesity Code and Complete Guide to Fasting translated, so I would assume its something you are probably already working on having done.


Thank you for all you do Dr. Fung!

Aleida Sanderson-Bagchus
Aleida Sanderson-Bagchus

I am delighted to have your new book. I like that all the material is put together in a logical and comprehensible order. I plan to share it with my doctors (family, endocrinologist, gastroenterologist) who all seem to be unfamiliar with this approach to treating type 2 diabetes. I hope to gain their support so I can in fact work with their supervision instead of going it alone.


Mine is coming in the mail TODAY! Can’t wait to read it. I heard that Dr. Fung gave a talk on his approach to a group of “traditional diabetes/obesity” practitioners – would love to “hear” (see a note) how that went – Did you convince any of them? Thank you Dr. Fung and Megan!

Stephen T

I’ll be buying my copy. I’m grateful for so much information being freely available on this site.

My niece has PCOS and her doctor put her on metformin without a word about changing her diet or the connection with insulin resistance. I was able to point her to articles on here and she’s now going in the right direction, albeit sometimes struggling to give up sugary junk and refined carbohydrates, which she has come to see as normal because that’s what she’s always eaten.


I am so intrigued and cannot wait until I receive your book. This past fall I was diagnosed with type 2 diabetes. Looking forward to your insight and welcome your advice.


Thank you for sharing your information about insulin and how it contributes to obesity and type 2 Diabetes. I’m one of those struggling with the early stages of Type II and hope springs eternal to find a natural way to bring my body back into balance. Thank you for providing some of the tools to do that and for providing that hope.
Pauline Easter


I was embarrassed to give anyone The Obesity Code for fear they’d be insulted. I bought a copy for myself, but I’m glad I can gift The Diabetes Code without causing offense.


Great book! Where can I find recipes for the dishes mentioned in the sample meal plans?


I have read the Obesity Code and I am a 240lb obese woman (not diabetic). I also take Prozac. Can prozac play a role in insulin resistance?

Just finished your book! I have been mildly pre-diabetic for a few years – even when I was at my thinnest right before a fitness competition. My mom is now T2 and on metformin. I am trying to do everything I can to keep from the same path. I am not overweight, but would like to lose 10 lbs anyway (living in South Florida is a motivator). I just did the Dr Kraft profile and my BG was so high in the mornings! I appreciated the description of the dawn phenomenon and I think I understand it more. I am… Read more »
Mo Harb

Dear Dr. Fung
Is this book apply to Type 1.5 DM LADA

I have learned much from you, but you are wasting your time trying to help these people. Unless of course you are making some money on the side, in which case it may be worthwhile. People won’t change. Just put them on insulin, get them on dialysis and get it over with. People are brain dead morons who stuff their mouths constantly and sit in front of the TV. To them, that’s living, that’s life. You know as well as I do, that’s what Americans do these days, and probably most Canadians as well during their long winters. It’s impossible… Read more »
Totally wrong. People don’t even need to change that much, they just need the CORRECT INFORMATION, and suddenly everything clicks into place. It’s funny you say you have learned much from the doc, and you missed the most important part of his message: no, it’s not the patient’s fault that he’s been trying to screw bolts with a hammer. It’s not the patient’s fault that medical advice for weight/D2 control is actually counterproductive. It’s not that the advice is sound, but people are morons. It’s the other way round: people are not morons, it’s the advice they’ve been receiving that’s… Read more »