So Is Jason Fung right...or wrong...is insulin even a factor in losing weight...and other issues.

2

Replies

  • 33gail33
    33gail33 Posts: 1,155 Member
    edited February 2021
    lgfrie wrote: »
    33gail33 wrote: »
    bubus05 wrote: »
    I am honestly curious what our own experts on MyFitnesspal think about the guy who is kind of famous or infamous-depending on whether you believe him or not- with his views on IF, fasting and keto. He is in favour of all of these three strategies though his favourite subject seems to be fasting, so is he wrong?
    On a number of posts and replies I have seen these kinds of statements 'Fung was debunked by experts with more knowledge' or 'as soon as I've seen him mention I bailed'. Whenever I mention any of these three strategies and say why I think they work I get debunked that is for sure. I was suggested to ask the community what they really think so here it is.
    First my own views. I think IF, fasting, keto work. At least in my own experience they do. From almost morbid obese at 285 lbs went to 190 lbs in twelve months, not super slim, but kind of healthy weight. I am a 50 year old relatively healthy male at 5.8. I have done all three but I have to admit lately I do have cheat days with high carbs, surprisingly even for me high carbs have not really effected my weight loss, if anything I felt I had more energy to put more pressure on my trainings. The only thing I have been very consistent is being in calorie deficit. I admit Fung got me into doing keto combined with fasting, so I am kind of grateful to him. His views on how insulin levels effect weight loss seemed credible so I tried to follow his advice and I feel I am successful, never felt better. Honestly, after years of unsuccessful attempts at losing weight here is a guy who explains how to do it and it works, a damn miracle in my book. And than I read on these pages I am wrong and Fung is wrong. That he is debunked by experts. WTF??? So I went to see the other argument. What I found is that essentially both sides argue the same thing except that, Fung says you go low insulin than you start burning fat and than you will lose weight. The other side says no he is wrong, you go into calorie deficit than your insulin level go down and than you start burning fat and than you will lose weight. The question of what came first the egg or the chicken...Both sides seem to be right, with one side claiming the insulin level is not that important it is the calorie deficit that is important. True, Fung doesn't speak of the importance of calorie deficit though, what he is saying is that with weight loss one's metabolism will necessarily go down so you can't really rely on that. That makes sense too, but the argument about CICO also makes sense. So I am at a loss why I lost the weight TBH. Fung seems to be right- i mean his strategy worked for me- but he seems to be wrong too, which is it...
    I am curious to hear you guys sharing your views on the subject.

    I get your confusion - MFP will never agree with anything that isn't straight CICO - and anything else that works towards weight loss ONLY works because it puts you in a calorie deficit. I think there is a little more nuance with regards to the influence of hormones, metabolism, gut health etc than that - but I don't know that it is enough to make a huge difference in the "real world" - because yes any calorie deficit diet will result in weight loss.
    I am not familiar with Dr Fung but my own personal doctor does believe that gut health and hormones are an important factor for metabolism and weight loss (she is a gp but has specialized practice in chronic illness and funcitonal nutrition). So while I do trust her opinion, it is hard to not have doubts creep in when you hang around here and it is constantly drilled into your head that those things don't matter. It's a conundrum for sure. But what I am doing is working for me (for my health and weight loss) so I'll just stick with it.

    I could be wrong, but I don't think anyone on MFP is saying gut health, hormones, etc., don't matter. One person will have a TDEE of 2100, and another person who's the same gender, height, weight, etc., will have a TDEE of 2200 or 2150 or 2035. Individual physiologies clearly differ and one's TDEE reflects the sum total of all the things that are going on inside your body, inclusive of insulin levels, other hormones, etc. etc. etc.

    But in the end, you gotta be in a calorie deficit to lose weight, and the size of that calorie deficit will determine how much weight you lose. Calorie deficit has always been the most important factor, by far, in weight loss and always will be, except in the case of quite unusual medical conditions. Whether there's 5 or 10 % at the margins that can be influenced by things other than calorie deficit, who knows, but those things are hardly the basis of a successful weight loss plan. Keto, IF, all may play a peripheral role in weight loss beyond their impact on helping one stay in a deficit, but the key word there is "peripheral".

    I'm not sure why you are quoting me, whether it is to disagree, or if you want me to respond or what. But as per the bolded part of my comment we are literally saying the same thing so.... yeah? (But note that my comment got several "disagrees" - my experience with MFP is that even mentioning the influence of another factor than CICO elicits a negative response. I don't get it, but its a calorie counting website so whatever.)
  • 33gail33
    33gail33 Posts: 1,155 Member
    @lemurcat2 I'm honestly not even sure why you are quoting me and dissecting my response. Sorry I'm not super clear what you are asking, or if you even want me to respond.
    As I said previously "communication is a complicated thing and we all "hear" through our own filters - so of course others may experience it differently."

  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs
  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..
  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    bbeyer1792 wrote: »
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..

    You have all kinds of misconceptions.

    IF doesn't cause more weight loss on the same calories.


    One shouldn't take a calorie deficit off BMR.

    BMR is your basic calories just to stay alive while doing nothing, so that's another misstatement.

    I dont exercise, the most activity I do is cleaning. I have some hormone issue. My acth is low as well as my thyroid but they won't treat it. I have gained 40lbs in the last year on 1200 calories. I was on birth control for 2 months and lost 30lbs eating the exact same, had to stop the birth control and gained it all back and kept gaining without changing anything until I started IF.
  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    cwolfman13 wrote: »
    bbeyer1792 wrote: »
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..

    Your deficit isn't taken from BMR...your deficit is taken from TDEE. BMR is the calories you burn merely existing on this planet and nothing else. My BMR is around 1800 calories...my TDEE is around 3000 calories...I lose about 1-1.5 Lb per week eating anywhere from 2300-2500 calories per day...far more than my BMR.

    What would my tdee be? I'm 4'10" 151lbs and am not active
  • steveko89
    steveko89 Posts: 2,223 Member
    Depending on age, 1500-1600 per a calculator I've found accurate (tdeecalculator.net). Medications will certainly muddy those waters but the statement that your deficit comes from your TDEE not your BMR is still accurate.
  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    steveko89 wrote: »
    Depending on age, 1500-1600 per a calculator I've found accurate (tdeecalculator.net). Medications will certainly muddy those waters but the statement that your deficit comes from your TDEE not your BMR is still accurate.

    I'm 32, if I ate 1500 calories a day I would gain even more weight.
  • bbeyer1792
    bbeyer1792 Posts: 18 Member
    cwolfman13 wrote: »
    bbeyer1792 wrote: »
    cwolfman13 wrote: »
    bbeyer1792 wrote: »
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..

    Your deficit isn't taken from BMR...your deficit is taken from TDEE. BMR is the calories you burn merely existing on this planet and nothing else. My BMR is around 1800 calories...my TDEE is around 3000 calories...I lose about 1-1.5 Lb per week eating anywhere from 2300-2500 calories per day...far more than my BMR.

    What would my tdee be? I'm 4'10" 151lbs and am not active

    Looks like probably around 1500-1600 calories if you're pretty much sedentary. If you have hormonal issues, you may benefit from IF by keeping glucose levels down possibly...but as has been said by multiple people, the problem with Fung's work is that he either thinks everyone is sick or diseased or even if they aren't, they should be eating a certain way anyway. He markets to the masses, not just to those who have issues and for the masses without issues, his stuff is quakery. There is no reason an otherwise healthy person needs to suppress the body's normal and natural insulin response by lowering glucose levels with IF.

    And yes...if you're not active at all, it makes weight loss pretty dang hard. Keep in mind that regular exercise also has a profound impact on hormone regulation in the body...is there a reason you don't exercise? 8+ years ago when I started I had pre-diabetic blood glucose levels...I started exercising regularly, and that pretty much put an end to that issue in short order.

    Honestly im lazy, I'm going to be getting a treadmill soon so that will help or when it finally warms up outside.
  • janejellyroll
    janejellyroll Posts: 25,763 Member
    bbeyer1792 wrote: »
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..

    Your deficit isn't determined by your BMR . . someone with a BMR of 1,280 could be using more calories per day depending on their lifestyle. And they wouldn't gain weight on 1,200 calories, so we're back to measuring appropriately . . .
  • cwolfman13
    cwolfman13 Posts: 41,865 Member
    bbeyer1792 wrote: »
    steveko89 wrote: »
    Depending on age, 1500-1600 per a calculator I've found accurate (tdeecalculator.net). Medications will certainly muddy those waters but the statement that your deficit comes from your TDEE not your BMR is still accurate.

    I'm 32, if I ate 1500 calories a day I would gain even more weight.

    I still think their has to be something amiss in your logging. My wife is 46 and 5'1" and loses weight eating around 1800 calories per day...granted, she's active, but even if she wasn't particularly active, if she was really eating 1200 calories per day, the weight would be flying off.
  • kshama2001
    kshama2001 Posts: 28,052 Member
    bbeyer1792 wrote: »
    cwolfman13 wrote: »
    bbeyer1792 wrote: »
    cwolfman13 wrote: »
    bbeyer1792 wrote: »
    bbeyer1792 wrote: »
    Caralarma wrote: »
    Dr Fung is a quack. You lose weight when you fast for 2 days... well no sh1t sherlock! Obviously eating less is going to cause weight loss. I once saw a video where he literally said calories dont matter. And he has so many brainwashed followers. I feel so sorry for them.

    I had been counting calories already at 1200 and was still gaining weight, I started 14-10 IF at the same calories and I've lost 5 lbs

    If you were gaining weight at 1200 calories you were either not using a food scale and or picking incorrect items from the database.

    No it was correct, my bmr is 1280 so it's already not much of a deficit..

    Your deficit isn't taken from BMR...your deficit is taken from TDEE. BMR is the calories you burn merely existing on this planet and nothing else. My BMR is around 1800 calories...my TDEE is around 3000 calories...I lose about 1-1.5 Lb per week eating anywhere from 2300-2500 calories per day...far more than my BMR.

    What would my tdee be? I'm 4'10" 151lbs and am not active

    Looks like probably around 1500-1600 calories if you're pretty much sedentary. If you have hormonal issues, you may benefit from IF by keeping glucose levels down possibly...but as has been said by multiple people, the problem with Fung's work is that he either thinks everyone is sick or diseased or even if they aren't, they should be eating a certain way anyway. He markets to the masses, not just to those who have issues and for the masses without issues, his stuff is quakery. There is no reason an otherwise healthy person needs to suppress the body's normal and natural insulin response by lowering glucose levels with IF.

    And yes...if you're not active at all, it makes weight loss pretty dang hard. Keep in mind that regular exercise also has a profound impact on hormone regulation in the body...is there a reason you don't exercise? 8+ years ago when I started I had pre-diabetic blood glucose levels...I started exercising regularly, and that pretty much put an end to that issue in short order.

    Honestly im lazy, I'm going to be getting a treadmill soon so that will help or when it finally warms up outside.

    Your Future Self will thank you if you develop healthier habits around exercise now :)

    There are plenty of ways to be active inside with zero equipment. If you need suggestions, do start a new thread on this.

    What does "cold" mean to you? When I was in the military in upstate New York, we were issued all sorts of cold weather gear, and I learned that one can stay warm in very cold weather when dressed properly. I bundle up and walk all winter long. Unless there's snow. On day one I shovel, and then I snow shoe. I got my parka at a thrift shop for $10 and a friend picked up the snow shoes at a yard sale for $5.

    Come see our exercising in the winter threads:

    https://community.myfitnesspal.com/en/discussion/10808194/winter-months
    https://community.myfitnesspal.com/en/discussion/10811010/working-out-in-winter-climates/p1
    https://community.myfitnesspal.com/en/discussion/10809157/what-s-your-plan-for-the-winter/p1