Diet & Weight Magazine

Why Could I Eat What I Wanted Before?

By Dietdoctor @DietDoctor1

Why Could I Eat What I Wanted Before and Not Gain Weight?

Why can many people eat pizza, cola, pasta and almost everything they want in their teens... and suddenly in their late 20's they put on weight just by looking at them?

It's time for this week's Q&A about intermittent fasting and low carb with Dr. Jason Fung:

Glucose response after diabetes reversal?

I am doing very well with fasting, but refuse to test my glucose tolerance until after I reach my goal. That said, I can't find the answer to the following question anywhere on your website, or the Diet Doctor website...

When you reverse your diabetes, is there a possibility to have a "normal person's" response again to a large dose of glucose? I know my long term goal is to keep fasting as a part of my lifestyle, but I would love to be able to have a normal meal with my family on vacation (for example).


Yes, you can have a normal meal with your family. It may be necessary to increase fasting after your vacation, though. Consider the sugar bowl analogy. Your body is like a sugar bowl. Over several decades, the cells of your body fill up with sugar, like the bowl. Once full, any sugar you eat overflows into the blood. That's essentially insulin resistance. The normal amount of insulin can no longer force sugar into the cells because they are already full. It's an overflow phenomenon.

When you reverse T2D, most people only do enough to no longer spill sugar into the blood, but the bowl is not empty. It's simply not overflowing. So going back to a 'normal' diet, you will quickly spill sugar and the T2D is back. But the process of insulin resistance and overflow is the same. This is why so many people say that T2D is not curable. If you really wanted to empty the bowl, it could mean fasting every other day for 5 or 10 years to reverse the 20-30 years that preceded it.

Dr. Jason Fung

Why could I eat what I wanted before?


I was wondering why I could eat pizza, Cola, pasta and almost everything I wanted in my teens... and suddenly in my late 20's I put on weight just by looking at them?


Because all that Cola and pasta was causing fatty liver and insulin resistance without you noticing it. Again, going back to the sugar bowl analogy, the cells of your body are filling up with sugar, but you don't notice it. Once it starts to overflow, you get insulin resistance, fatty liver and the same pizza and Cola now get turned directly into fat.

Dr. Jason Fung

Learn more about insulin resistance and how to reverse it: A New Paradigm of Insulin Resistance

Possible to not lose any weight during extended fast?

End of day 3 of fasting, and no weight loss at all. I've had coffee, hot tea, water and broth. I feel great and no problems, so I'm not tempted to give up, but will hang in there. But... how no weight loss, and how only light ketosis?


I've seen it too, because the body weight is a poor measure of what's happening. Usually we see waist circumference drop, and the weight stay stable, which means that you are losing visceral fat (the most dangerous kind) and perhaps gaining some lean mass due to increased growth hormone.

Ketosis is different. In some people, ketones don't rise as quickly as glucose falls. Fasting usually will make the body more efficient at producing ketones, so it just takes the body some time to acclimate.

Dr. Jason Fung


Intermittent Fasting for Beginners How to Reverse Type 2 Diabetes - The Quick Start Guide

Earlier Q&A sessions with Dr. Fung:

Many more questions and answers:

Intermittent Fasting Q&A

Read all earlier questions and answers - and ask your own! - here if you are a member:

Ask Jason Fung about intermittent fasting and type 2 diabetes - for members ( free trial available)

More with Dr. Fung

Dr. Fung has his own blog at He is also active on Twitter.

His book The Obesity Code is available on Amazon.

Why Could I Eat What I Wanted Before and Not Gain Weight?

His new book, The Complete Guide to Fasting is also available on Amazon.

Why Could I Eat What I Wanted Before and Not Gain Weight?

You Might Also Like :

Back to Featured Articles on Logo Paperblog

These articles might interest you :

  • Is High Cholesterol Dangerous on A Low-Carb Diet?

    Is high cholesterol dangerous on a low-carb diet? For some people, the "bad" LDL cholesterol goes up, while other aspects improve (like the "good" HDL... Read more

    By  Dietdoctor
  • [NYC] Go! Go! Curry!: Dinner in a Hurry!

    [NYC] Curry!: Dinner Hurry!

    This post is going to be quick and dirty, just like a meal at Go! Go! CURRY! in NYC. After hippoCHAN finished class, it was already pretty late and we were... Read more

    By  Foodobyte
  • Choose the Right Generator for the Right Purpose [Infographic]

    Choose Right Generator Purpose [Infographic]

    Choosing the right generator for the task is very important but sometimes we find it difficult to pick the right one as there are many options available. Read more

    By  Kravelv
  • My Garden Right Now

    Garden Right

    I'm writing this post specifically in order to participate in Michelle Chapman's meme called #mygardenrightnow. If you want to know the full story behind this,... Read more

    By  Mwillis
  • Most Sociable and Friendly Cities in the World

    Most Sociable Friendly Cities World

    The most sociable cities of the world were revealed by booking website “Hostelworld” following a study which covered 39 cities in 28 countries. Read more

    By  Poundtravel
  • Getting Summer Ready with Herbs & More

    Getting Summer Ready with Herbs More

    Hey beautifuls, hope you all are doing great. Mumbai is burning, and perhaps I am seeing the hottest February since the time I have come to the city. Read more

    By  Jhilmil D Saha
  • The Atomic Bomb

    Atomic Bomb

    Richard Rhodes' history of the development of the atomic bomb, The Making of the Atomic Bomb, is now thirty years old. The book is crucial reading for anyone wh... Read more

    By  Dlittle30