The Complete Guide to Fasting – Now Available

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I’m happy to finally be able to say that my book The Complete Guide to Fasting is now available in Canada and the United States. The Kindle version should be available very soon, and the audiobook will be released in several months.

I co-authored this book with Jimmy Moore, who has written several international best-sellers already – Cholesterol Clarity, Keto Clarity and The Ketogenic Cookbook. I first met Jimmy in Cape Town, South Africa during the Low Carb Summit in 2015. Jimmy was familiar with fasting, having tried it a few times himself and also writing about it very briefly in Keto Clarity.

Most of the speakers there follow the Low Carb, High Fat or Ketogenic approach, but I tend to use incorporate intermittent fasting quite extensively in my Intensive Dietary Management (IDM) program. There are many synergies between the two approaches. Both have the goal of lowering insulin, which I believe as the key drive of obesity. However, intermittent fasting tends to be more powerful than LCHF diets since it restricts everything. Also, people who follow ketogenic diets find that fasting is quite a natural extension of their diet. Since their body is already fat-adapted, there is a far easier transition to fasting and most people find that it is very easy.

Further, fasting brought many advantages not found in traditional diets. It was very easy to understand. It had a long history – the oldest dietary intervention. It was free (actually saves money). It doesn’t take time (it actually saves time – cooking, cleaning, shopping). It was powerful. It was simple (just don’t eat).

We’ve been using intermittent fasting in the IDM program for over 5 years and have supervised over 1000 patients with this approach with tremendous success. It’s not an approach that everybody likes, but it represents an important option for those willing to give it a try. There are virtually no other clinics in the world that offer this detailed knowledge of fasting. I suspect that we have more experience with fasting than anybody else in the world. By a factor of 4 or 5.

After the conference, I started talking with Jimmy, who became interested in fasting again and thought he might give it a more serious try. I had just finished writing  The Obesity Code . While it did mention fasting in the last chapter, the focus of that book was understanding the underlying causes of obesity. There were still many things people kept asking.

How to fast. Common problems. Who should not fast. Different types of fasting. Different lengths of fast. Will I lose muscle. Will I go into starvation mode. There were endless questions not answered by my first book. These were issues that Megan Ramos, my IDM program director and I deal with daily.

One day, Jimmy asked me what was the best book to read about intermittent and extended fasting. I’ve read everything available. I’ve read all the studies. I’ve read everything online. This is not actually very difficult because there is really nothing out there. So, that’s what I told him. There were basically no good books on intermittent fasting. Some books dealt with fasting from a spiritual perspective.

But there was nothing that a regular person could go to their bookstore and buy a book that discussed fasting as a therapeutic option in a serious manner. So we decided that we needed to write it.

We scoured the globe for the other leading experts, including Mark Sisson, Robb Wolf, Abel James, Megan Ramos, Amy Berger, and Dr. Thomas Seyfried, who all agreed to lend their expertise to this important venture. Together, we’ve put together what I believe to be the definitive guide to fasting, the ‘Bible’ of fasting that will be able to guide many people through this journey.

Fasting Resources

I believe this book will be a tremendous resource but there are also many great fasting resources available online, as well. By far the most useful is the page ‘Intermittent Fasting for Beginners‘ on www.dietdoctor.com which is completely free. On my blog, www.intensivedietarymanagement.com, I have written an extensive series of posts on fasting starting with part 1, a history, and lasting 26 parts so far. All that information is completely for free, if you can put up with my occasional ‘salty’ language and propensity to say exactly what I think.

For subscribers of dietdoctor.com, however, there is a 9 part detailed fasting series of videos that will guide you step-by-step through fasting. I travelled to Sweden to film this series with Andreas and I’m very proud of it. The video series presents all the information clearly, concisely, and with  beautiful graphics and video production. It’s some of the best work I’ve done. Andreas and his team helped refine the video and we did take after take. It was exhausting, but the finished product is quite remarkable and not available anywhere else in the world. For a mere $9/ month, I cannot think of anything that will improve your health more. You can even try it for a month for free. You can’t get much better than that.

Also on the subscriber side of www.dietdoctor.com, I answer reader questions. I cannot legally answer personal medical or dietary questions, but general questions that are not addressed elsewhere, I am quite happy to answer them within a few days (usually).

If you think you need a personal dietary counsellor to help you achieve your goal, I’ve also set up a program for that, too. You can join at www.intensivedietarymanagement.com/join to connect with one of our counsellors who have guided hundreds of patients through LCHF diets and fasting. There is a fee for this service, but we’ve kept it as low as possible ($500 Canadian per year). We provide this program online, so it can be delivered anywhere in the world. We have literally more experience with helping people fasting than anybody else in the world.

Together,  we are dedicated to healing the world, one person at a time. We’ve put enormous resources online, mostly for free, along with books, videos, blogs, and even personal coaching. There is nothing to stop you from taking back control of your health from the drug companies and the charlatans who have ruined it. It’s a revolution – the nutrition revolution!

2017-10-13T21:43:46+00:00 113 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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Martin Williams
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Jimmy Moore writes a preface or foreword to this book after Jason Fung’s admirably brief one. It refers to Moore’s weight loss in 2004-5, but makes no further reference to his actual weight now, despite supplying detailed, up-to-date blood-work data. I’ve been following this blog for a while, and I think it’s probably one of the most important websites on the planet. But I am, at the same time, disquieted by Moore’s involvement. I’m not in the same boat, I promise you, as that pain in the arse who comes on here and just makes a bloody nuisance of himself.… Read more »
Jimmy Moore
Guest
Thanks for your comments about me, Martin. I’ve made no secret of the fact that I have gained back some of the 180 pounds of weight that I lost in 2004. I talk about it frequently on my podcasts and in my public lectures. I am not hiding my friend. But I’m nowhere close to the 410 pounds I once was in my life. The challenges of dealing with severe insulin resistance from the poor nutritional choices of my past have made managing my weight a lot more difficult than it is for most. That’s why I became serious about… Read more »
Stephen T
Guest
Jimmy, your work is appreciated and is helping many people. Most of us have some understanding of the additional difficulty for the severely insulin resistant. It might help if you were to elaborate a little on that. I assume it means that you have to be very low carb and any deviation has disproportionate effects? In short, your body has been damaged and is now very unforgiving? For some people less familiar with your circumstances, and extra difficulties, the question of your weight may well occur to them, so I think Martin’s question has served a purpose. I think it… Read more »
Sue
Guest

Just appreciate your hard work and honesty! People will always find fault no matter who says what about what. We will all carry on and fight the good fight together. We are grateful to have your leadership. Thanks.

Martin Williams
Guest
The substance of my criticism of you, Moore, is that you are clearer about past losses and vaguer about more recent gains. I was frustrated when I read your piece in Fung’s book not to find detailed weight-loss figures. It came acxoss less like dishonest omission than head-burying. But if you purport to be an authority BASED ON YOUR OWN PRACTICE, you must publish the facts. If you said that such-and-such an approach achieved this, but unfortunately I gained this much back, etc., then I wouldn’t be moaning. I give you credit for calling titling your preface ‘Experiments in fasting’,… Read more »
Phillip
Guest

Heya Martin, the most honest people on the planet are drinks and children. I am actually impressed that Jimmy deigned to respond to you, somewhat like Zeus has descended from the mountain. We all know what happened then 🙂

Martin Williams
Guest

Actually, I don’t know what happened to Zeus? Was he arrested?

charles grashow
Guest

Jimmy Moore

Simple question – how much did you weigh at the start of your fast??

Steve
Guest
On the other hand, just because the messenger (Moore) may not have the resolve or motivation to heed what we all know to be a sound, scientifically-supported message, does not necessarily mean the message is therefore flawed. For example, we know that a law prohibiting murder is rational and necessary, but if a lawmaker is found guilty of murder the law itself is not discredited by the lawmaker’s hypocrisy. Likewise, many smokers–unable to quit–still tell their kids that smoking is unhealthy. So, whether Moore is arguably guilty of hypocrisy, it shouldn’t taint the book’s credibility or the sound science upon… Read more »
Agnes
Guest

Martin, your ‘reasoning’ is just an ad hominem attack. Besides, to answer your question, I’d totally hire a fat personal trainer, as long as they know what they are doing and the struggle training might be for some people. Actually, I’d rather hire the fat personal trainer who understands me and what I’m going through than the young, naturally skinny no matter what he eats guy who loves sports since he was born… What is he going to teach to a woman who deals with insulin resistance and is very self-conscious about exercising?

Martin Williams
Guest

Perhaps you’d also pay good money for a quit-smoking seminar hosted by a chain smoker. Perhaps, as he lit up, he’d open with a quip paraphrasing Mark Twain: “Giving up smoking is easy. I’ve done it hundreds of times!” And you’d laugh and stay and buy his book at the end.

I’m not being personally or gratuitously rude towards Moore. He is a professional who makes his living from this business, and he is therefore fair game for reasonable criticism and questioning.

Agnes
Guest

Actually, I used to smoke and when I quit I looked for people who had done what I wanted to do, even if they had failed; especially if they had failed and tried again until they succeded. Would you really listen to someone who has never smoked and therefore knows nothing about it?

Ad hominem attacks are rude by nature. Of course, Moore and anyone is fair game for reasonable criticism and questioning. What I’m saying is that your comment is neither of those things.

Sue
Guest

Well said Agnes!

Martin Williams
Guest
Nonsense. You don’t clearlly understand what the term ‘ad hominem’ means, and where it doesn’t apply. It refers to an irrelevant criticism of the person making an argument rather than a criticism of the argument itself. But if a person says, in effect, “This is a good pudding, and I personally am the proof of it,” putting himself forward as the n=1 exemplar of a particular dietary approach, for instance, then that IS his argument, and his personal results are not only open to criticism , but demand it. He need only, in my view, be clearer about current fluctuations.… Read more »
Pete
Guest

Bravo Dr. Fung…well done!

deirdra
Guest

amazon.ca says 1-2 months for delivery; not exactly “available”

MH
Guest

According to Amazon, my paperback copy will arrive Thursday, October 20.
There is also a Kindle version available for immediate download.

Patrick
Guest

I preordered it and it says October 20th but it hasn’t shipped yet…. I’m getting this for my mom, she’s a T2D and I got her to do keto for 2 months but she wasn’t losing weight and she went off it.

WeetFree
Guest

Women rarely lose weight on keto without counting calories. For verification see reddit.com/r/xxketo. Hundreds of women with same results. As a woman I have had the same result as well.

Patrick
Guest

I think she was eating too much fat. I did a lot of intermittent fasting when I first started.

Wenchypoo
Guest

My husband did keto for 1 1/2 years and didn’t lose any weight–what got things moving was a combination of chromium picolinate, milk thistle, and red palm oil caps.

Nina
Guest

Hi Wenchypoo, Why did you choose that particular combo of supplements?

WeetFree
Guest
I can’t reply to your latest comment: I’m finding success on keto only when I push my percentage of fat to 80% or more, which is similar to other LCHF advocates like Jimmy Moore. I found this with experimentation. However, it is easy to overeat because fat is so calorie-dense, so I have to be very careful and track everything. I wonder if there is something inherently different about women’s bodies and how we perceive fullness, since our bodies want to store, store, store and make sure we can support a 9-month-long pregnancy through famine. Or if we break our… Read more »
Steve A.
Guest

I ordered it 2 days ago, and Amazon tells me it won’t be delivered until November 15. *Sigh.* Well, I guess that’s a good sign–it means there is a big demand; lots of people clamoring for it. Can’t wait to get it. I’ve read about 6 books on fasting, and this one promises to be the best.

MH
Guest

Got the Kindle version and ordered the paperback!
(The paperback will be a gift)
Great read!
Includes lots of good recipes!
Congrats on writing what is certain to be a best seller!

jk47
Guest

if you’re fasting, recipes should be pretty simple! 😉

MH
Guest

It has been my considered opinion that there maybe some serious downsides to a permanent fast, so the recipes are appreciated. ?

Sue
Guest

…..laughing……

Victoria Love
Guest
Thank you Dr. Fung. In a very short amount of time, your teachings and those found on Dietdoctor.com have allowed me to loose weight, normalize blood sugar, and avoid diabetes medication. I was diagnosed with T2D in June 2016. Since then I have lost 44 pounds (BMI now 21.4)) using IF and LCHF. Best of all, my fasting blood glucose numbers are NORMAL, (overcame Dawn Effect) and I know how to eat (and when to fast) to keep my blood sugar between 80-110 at all times (normally below 100). I am so grateful and look forward to reading your guide… Read more »
Batool
Guest

Hello dear Victoria
Please tell me how did u start the programme. I was diagnosed with type 2 diabetes 3 months ago, I m on metformin 500mg twice a day. Do I have to take my Meds while fasting? After how many more months u were able to reverse ur T2. My main problem is I couldn’t find a good doctor that can understand Dr Jason’s theory. Every doc says 3 meals and 2 snacks

Stephen Reed
Guest
Nice work Jason. I’ve been involved in fasting, using it as a tool for my clients, mainly those looking to use IF alongside a strength training program. It works great, but I’ve also seen some downsides, be interested in your view. I’ve also seen it on a lot of forums, including one on Facebook dedicated to your Obesity Code book. People seem to see intermittent fasting as the holy grail for weight loss, and what begins as a good and useful tool turns into an obsession, fasting for longer and longer periods, more and more times a week. I think… Read more »
Roger Bird
Guest

“if you can put up with my occasional ‘salty’ language and propensity to say exactly what I think.” Jason, this is what makes me like reading you so much. (:->) And the humor.

Monika
Guest

Yes, that! I’ve listened to all his lectures on youtube, and found that he writes as he speaks. Funny. Enjoyed reading this book.

Mr Mise
Guest

Even if you have read all the 26 blogposts on your site, is it still worthwile to buy a copy of the book? Does the book cover additional topics?

Sue
Guest

I love to have all the information in one condensed place. That way, when I read it, I highlight things that resonate with me or things that get lost in the shuffle of life, that way I can go back and just read the highlights. Also, when I talk to others about it I can easily “defend” myself or encourage others. (Of course as I steadily lose weight and people can clearly see that I’m energized and happy I find I have to “defend” less and less.) 🙂

WeetFree
Guest

So far I’m finding the book an easier read, for what it’s worth. It’s putting it all together for more practical application versus being a very thorough scientific overview. Just my impression so far.

Mr. Mise
Guest

Thank you both for your answers. I have made a decision to pick up a copy. 🙂

Kirsten
Guest

I look forward to reading and can do more easily since I spend 60% less time in the kitchen (because I am now intermittently fasting). Fasting is the bomb for those who want more time to complete more tasks in their day.

Michael
Guest

>I suspect that we have more experience with fasting than anybody else in the world. By a factor of 4 or 5.
Really? More than, say, the Buchinger Clinics?

Valerie
Guest

And more than TrueNorth Health Center?

Liz
Guest

Jason Fung – a hero of our times

Joan Day
Guest

YES…he sure is..

Dorothée
Guest

Buchinger clinics say little about intermittent fasting (Doesn’t mean they know little about it – but clearly it’s not their focus). They even don’t offer fasting for shorter period than 6 / 7 days (not including “entrance” and refeeding phases)- which they call “short” fast and is already “extended” to many people.

Chris
Guest

Dr. Alan Goldhamer’s True North Health Center in Santa Rosa, Calif. has been using extended fasts for many chronic issues for over 30 years. http://www.healthpromoting.com/

Lynn
Guest

I ordered mine months ago from amazon.com and it is to be delivered this afternoon. I cannot wait☺

Sandra Rodriguez
Guest

….occasional ‘salty’ language that’s what I look forward to in each of your articles.. You make it so easy to understand and I look forward to each article you write. Love all of your webinars, articles, posts and articles.

Deborah
Guest

I pre-ordered back in July and received my copy today! (Day 5 of my current water fast)

Thank you for the great blog posts, Dr. Fung!

Christoph Dollis
Guest
Bought it. Nice. I REALLY like how you’ve honestly and with integrity incorporated knowledge gained here and elsewhere, sometimes started with friendly discussions, even occasional disagreements, with your commenters (including yours truly) about things such as the insulogenic nature of animal proteins into your understanding, model, and book. One example is in this passage: Obesity and type 2 diabetes are both problems of excessive insulin. Since refined carbohydrates are a prime contributor to high insulin levels, the natural place to start with my patients was a low-carbohydrate diet. Protein, especially animal proteins (dairy and meat), can also stimulate insulin production,… Read more »
Punky
Guest
Thank you, thank you, thank you. My father, a GP, has reversed his Type 2 diabetes, lost 13kg, and stopped all medications thanks to you. You have looked at obesity and diabetes in a completely new way, and as soon as we saw your videos, I knew what you were saying was right. Its all very logical, and frankly, I’m amazed that no other medical professionals are connecting the dots in the same way. But the tide is slowly turning, thankfully, and hopefully one day, the mainstream will catch up. I studied dietetics at uni, although I don’t practice in… Read more »
wang tao
Guest

you change my life,thank you very much.keep the great work.

David
Guest

Did Alan Goldhammer decline to be involved?

Christoph Dollis
Guest

Does Dr. Fung have a particularly close association with Alan Goldhammer? There are hundreds of relevant figures one could have associated with.

David
Guest

He said he sought out the leading experts, and Goldhammer is the first or second leading expert so it’s a glaring omission.

It’s like writing a book on ice hockey records without seeking to speak to Wayne Gretzky or Mario Lemieux. It looks strange.

Christoph Dollis
Guest

is the first or second leading expert

So you really like him.

David
Guest

I’ve ordered a copy from amazon and am looking forward to it.

David
Guest

There’s not usually a lot of flame wars in this community, so your ad hominem response is unfortunate. Honestly, yours is the second petty flame I’ve seen, and U’ve been posting here for months.

How many people other than Dr. Goldhammer have successfully supervised thousands of water-only fasts over several decades in a medically-supervised setting, dealing with a broad range of ailments, and lectured and published on the topic for several decades including long before it became interesting?

David
Guest

The above was supposed to be a response to Christoph Dollis.

Christoph Dollis
Guest

What are you even talking about? I like Alan Goldhammer just fine, so far as I know him (listening to a few of his talks on YouTube, and reading about him).

Ad hominem attack? Dude. I’m just saying you can write a book on fasting without highlighting him in particular, however good he may be.

Birgit
Guest
Thank you so very much Dr. Fung. As a 66 year old woman with T2D who is morbidly obese, I have been struggling with my weight for many decades. Now that I found the combination of IF and LCHF my health is improving tremendously. I have lost 50 lbs and have 100 to go. My question for Dr. Fung is, is there any way I can join your long distance group with Megan even though I live in Toronto? Understandably, you have an extremely long waiting list (1 year, I believe) and although I have been following your blog and… Read more »
WeetFree
Guest

I just bought the kindle version! So excited! Thank you very much for this.

Christine, PhD
Guest
Congratulations Dr. Fung. A publication is a HUGE achievement. I am new to your blog, I am hoping to discover why LCHF, now on my third attempt in 20 years has not been successful. I’ve fasted before I even knew what it was, I’m not a snacker, so the overnight 16-18 hr. Fast is a usual thing. Any longer makes me ill. But I am not losing anything according to any measure of success, even doing all the recommended protocols. I eat to my meter (I’m not diabetic), and keep BS under 120 easily at all times. My fasting BS… Read more »
Engr_Rene
Guest
Christine, PhD – check this out http://www.wheatbellyblog.com/2012/10/i-lost-the-wheat-but-didnt-lose-weight-2/ I follow the Wheat Belly Blog also with this blog. I found Jason Fung when I got rid of my glimepiride medication following the Wheat Belly diet, which is similar to LCHF Moderate Protein diet, and I can fast without getting hypoglycemic episodes. Dr. Fung & Dr. Davis are both too busy to reply to their blogs but a guy named Bob Niland is very helpful on the Wheat Belly Blog, he might be able to help you. There are others on that site having issues with not losing weight because they have… Read more »
Christine, PhD
Guest

Dear Engr_Rene,

Thank you for your comments! So kind! I am familiar with the wheat belly blog, I will pay more attention there and hopefully make contact with Mr. Niland.
If I fast longer than my usual time my hypothyroid kicks in even with meds. Otherwise I could manage it, it must be my insulin is low and I am fat adapted? But if that were true why don’t I lose weight? Hope to find answers. For now I am considering lowering protein. I had not tried that.

Engr_Rene
Guest
If your insulin is low & you’re fat adapted then you should be losing weight. There must be something else going on if you’re not losing weight. Hypothyroidism & being menopausal might be causing it. Sorry but I’m not familiar with those issues. Don’t lower you protein intake if you’re just going to replace it with carbs. Healthy fat is a good replacement. Eat until you’re satiated otherwise you’ll run the risk of slowing down your metabolism. I know that sometimes it can be frustrating. My weight goes up & down by about 2 lbs. +/- every week. But as… Read more »
Birgit
Guest
Hi Christine, I can understand your frustration, as an older woman with T2D, with severe sleep apnea, low oxygen concentration while asleep, and severe stress from chronic pain increasing cortisol levels, my journey is very challenging, but I am making progress albeit more slowly than those who are younger, without additional issues, and shorter term obesity and/or T2D issues. Dr. Fung somewhere in this blog talks about people with more complicated issues like mine. Perhaps your situation is also more complicated in some way? I don’t know what “eating to my meter” means. But it sounds like a UK expression.… Read more »
TJtheGrouch
Guest

Got mine in the mail today. Read it in one sitting. THANK YOU Dr. Fung!
I am a retired orthopaedic surgeon, and I am sure I owe Dr. Fung my present quality of life.
You have my email. If you ever are in Nashville, TN, remember I owe you big time. Anything I can do for you, name it.

John C
Guest
I have ordered the fasting guide to add to my collection of dietary books. Having reversed my type 2 diabetes a few years ago by losing weight on a calorie-restricted low-fat diet, I have been trying to understand why I was successful and how I can sustain the weight loss. Dr Fung’s theories and practice have been the most convincing explanation of my experience. I knew that the low-calorie diet was unsustainable in the long term because I had lost and regained weight several times in the past. Luckily, I was able to enrol in the long range program of… Read more »
Jim Wright
Guest
Great book! I read it in a day, and marked the snot out of it for future reference. It’s not just a rehash of the blog posts; I found enough new material, and specific information I really hoped to see answered, to consider it well worth the purchase. It’s well organized, and the Fasting Success stories, are inspirational. I’m prediabetic, and started at over 500 pounds. I’ve done IF a couple times a week and done several fasts of 5-7 days, and have come down more than 60 pounds. In addition, I’ve seen improved inflammation levels, less joint pain, easier… Read more »
Sue
Guest

Congrats Jim! Slow and steady wins the race!

Lynn
Guest

The book answered many of the questions I would like to have asked Dr. Fung so well worth it for me.

Jim Luton
Guest

Jimmy Moores verbosity ruins the book for sure. Dr Fungs original work is fantastic. So bad to see it being tainted by Jimmy Moores presence.

Jimmy Moore
Guest

Thanks for your kind words buddy. Enjoy the book! ☺️

Birgit
Guest
Jimmy Moore, as you are personally well aware there will always be critics and nit pickers who want to delegitimize the experiences of others. Insulin resistence, obesity, metabolic syndrome and blood sugar issues are chronic and life long in my view. I believe that many of us are like alchoholics, we must be vigilant every day of our lives, even if we have no had a drink in decades. There are social issues, emotional issues, hormonal issues,low basal metabolism from many decades of yo-yo dieting and many more issues that people need to be constantly aware of. Criticizing someone in… Read more »
Martin Williams
Guest

Why then, Birgit, even in his answer to me on this forum, could he not bring himself to divulge his current weight? Why is a request for transparency traduced as nit-picking?

hcat
Guest
The success I’ve found through fasting/IF has completely changed my life. Last fall, through convenience and habit, I began eating only once a day. It wasn’t a decision I made to lose weight, I just noticed that I didn’t really get all that hungry until late, late in the day, so, why not just wait and eat then? I’ve always been the type of guy that LOVES grazing and snacking on sweets all day, so this was a bit of a challenge at first. But I managed to start skipping breakfast, lunch, and not eating until about 5 or 6pm… Read more »
Martin Williams
Guest

hcat: Would you mind if I asked if you altered the content of your diet as well? Dr Fung obviously advocates eating natural unprocessed food on top of IF as a counsel of perfection, but I wondered whether your great results were done purely by fasting.

hcat
Guest
The only major change in my diet was I quit drinking beer. Beyond that, I still ate most of the same foods, just smaller portions, and within my window. I’m not pleased to admit it, but I still do enjoy a good indulgence during my eating windows, but I eat rather infrequently, so the balance seems to work out. However, based on the information in Dr Fung’s books, I put a lot more thought into the food I eat now. I still enjoy all the same foods, more or less — just much more sparingly. And I ALWAYS make up… Read more »
Martin Williams
Guest
Thanks. That’s interesting. I found I lost weight formidably quickly even by doing an 18:6 thing – sometimes an 18:4, or a 20:6, if you see what I mean. Beer (or rather cider) is my bete noire, but when I measured everything for a month once (macros, weight, fasting periods, alcohol consumption), I thought, at first, that alcohol reversed the weight loss I enjoyed on or after non-drinking days. On closer inspection, I found the data to be ambiguous, because drinking increased my food calories both during drinking and on the day following. I’m in no way advocating regular boozing… Read more »
Lynn
Guest

Oh how I wish I were male. I am doing same as you and losing very very slowly. 5lbs every 3 months so in total I will lose 20lbs this year. But in retrospect my health markers are wonderful now.

BobM
Guest
Not all men are like that. It’s taken me (52 year old male) almost 3 years to lose 55 pounds. I lost about 30 in 1.5 years with low carb, then started IF + LC, then lost another 20, and recently went keto and IF and have lost another 5 or so. And I’ve done many 3+ day fasts (longest 5.5 days) and many more 24, 40 hour fasts. Some of that is muscle mass loss, as I’ve decreased my exercise and no longer lift weights. Went from 4 days per week of exercise to 3 and now 2.
BobM
Guest

If you calculate that out, it’s less than 2 pounds per month. Note that I spent several months (tried twice) trying resistant starch and probiotics, which appeared to me to cease weight loss and cause higher blood sugar readings. I may have lost more weight except for that. Now, I eat a low-fiber, low resistant-starch diet and feel better.

Denise
Guest

Question…I order Organic Real Bone Broth that arrives frozen…is this exceptable? I have had no luck trying to make my own bone broth. Thank you!

Stephen T
Guest

Denise, I can’t see any problem at all.

charles grashow
Guest
Rosemary
Guest
Exceptional book and added my “MUST READ” review to Amazon – I got it the first day as I had ordered well ahead of time waiting for its release. My journey began in July when I read THE OBESITY CODE — and have been reading every word by Dr. Fung ever since, checking every day. I went immediately to get blood work, am already down 35 pounds and have integrated a team of folks around me to show them what I’m doing – my doctor, my PT, my trainer, my massage therapist – and no one had any knowledge of… Read more »
Danni
Guest
I was wondering, suppose my last meal of the day is at 5 pm, then around 7 or 8 pm I exercise hard (HIIT maybe) to deplete glycogen until my Glycogen “let say empty or almost empty”, then I dont eat anything ( or I eat small amount protein but no carb to prevent muscle loss), then go to sleep, and next day, break my fast around 1 pm. My goal is I want to burn fat immediately (because no or small amount glycogen after exercise). My thought is if your glycogen empty or almost empty before Fasting, you can… Read more »
Nina
Guest

Congratulations, Jason – a fantastic book!

Tom
Guest

In your book, do you address exercising while fasting or should it be limited or excluded all together?

Jorge Uribe
Guest

Dr. Fung good afternoon I would like to get your book “The Complete Guide to Fasting” Heal Your Body Through Intermittent, Alternate-Day Fasting and Extended translated into Spanish. Are there any plans to sell it in that language? Greetings.

Suzanne
Guest

I already had gotten and read “The Obesity Code”..which was great, and wasn’t sure if “Complete Guide to Fasting” would be necessary to my new LCHF and IF lifestyle. Well, I am so glad I decided to buy the second book on fasting. It is wonderful. Great personal stories…and recipes. Love the format and the information. It has just enhanced my knowledge and motivation to embrace this LCHF and IF lifestyle. Thank you.

charles grashow
Guest

Just read the book – not good at all – IMHO

Martin Williams
Guest

What does that mean?

You’re such an arsehole, Charlie, it makes my eyes water.

And you’re not even a proper troll. Because real trolls change the bridge they hide under from time to time, after they get chased away by angry villagers.

If there were ever a case for beating the living daylights out of particularly nasty children, you’re the (unfortunately) living embodiment of what happens otherwise.

Stephen T
Guest

Well said, Martin.

He’s one Olympic bore.

Joao Alberto
Guest

Dr. Fung

Please publish “The Obesity Code” on iBooks Store. Only “The Complete Guide to Fasting” is there. I’d like to read “The Obesity Code” in advance.

Congratulations on your against the tide efforts.

Regards from Brazil

theoldguy
Guest

This is a GREAT book!!!!!

Francesca
Guest

I got the book, and it’s great!
However I don’t need fasting for weight lost or diabet. (The books focus a lot on those issues).
I was a bit disappointed to see that there was not much information on how often, in a year for example, one can do the extended fast. (3 to 14 days)

Jen
Guest

THANK YOU Dr Fung.
For your effort, your study, your care, your thinking, your willingness to row against the rapids.
Yep, you are a TRUE CHAMPION.
Wish I could shake your hand.
JIMMY – thanks for taking your ole guinea-pig self and baring all, and speaking in words which are clear.

JohnM
Guest
Bought the book at a local bookstore and finished reading it the next day. Where The Obesity Code clearly and fascinatingly details the biological “what” and “why”, this book completes the knowledge base by adding “how”, especially in regard to important considerations which clarify various extended fasting options. This book is easily the first one that comes to mind when recommending a single, all-encompassing book to others desiring a simplified process for weight loss and improved health. I appreciated Jimmy Moore’s detailed introduction. His first-hand experience and insights into the process will alleviate many common first-timer concerns. Everyone experiences ups… Read more »
Terri
Guest

Thank you Dr Fung for sharing your extensive knowledge about insulin and obesity. you have blown my mind with all this info that is so contrary to what i have always believed. I also love your matter of fact and open writing.
I am waiting for my copy of your book…..I should have any day now! yay!!!

Constance Goodyear M.D.
Guest
Constance Goodyear M.D.

I understand this and I agree with this – want to lose weight then as Dr. Fung’s son said, “Don’t eat”.
Just one teeny tiny problem – I have gone through all your posts and your books and you do not address the problem so many have with intermittent fasting. It leads so often to Binge Eating !!!

Darko
Guest

Jimmy Moore is a formerly super morbidly obese person who transformed into a just regular morbidly obese person. The fact that he is tries to be the face of health is hilarious. I wish you had co-written the book with someone who isn’t still extremely overweight and looks like a deflated balloon in the few parts he isn’t carrying fat.

Mary Cameron
Guest
I was diagnosed with stage IIb ovarian cancer 3 weeks ago. I intend to use fasting rather than chemotherapy to mop up the loose cancer cells looking for real estate inside my body. I am also using hydrogen peroxide baths and herbal tonic. I lost 50 lb over 3 years using LCHF foods, and the last 15 lb came off quickly when I quit drinking white wine. I take no alcohol now ( save for a couple glasses of sparkling every blue moon). I am particularly interesting in extended fasting in relation to healing. I am 57 years old. I… Read more »
Gunnar Isaksson
Guest

Today I got at last the book here in Sweden and I have only skimmed it through. It has been very difficult to obtain a copy. Now my weekend will be filled with good science that is really easy to understand.

JohnM
Guest

Errata correction for pages 254-255. In the sections for both coffee and tea, “whole milk” appears in both the can and can’t columns.

Also, as an example, up6 cups of coffee are allowed with 1 tbsp each of certains fats. In the case of butter that could be 600 calories! Possibly not an issue due to it primarily being an MCT? Prudence implies that less would be more.

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