Why Do We Get Fat? Part 2 – Insulin is the key
Pre-order The Hunger Code at www.doctorjasonfung.com. Check out hunger management tools at www.drinkaeira.com
Stop counting calories. If 'Calories In, Calories Out' really worked, why do those diets
fail 99% of the time? In this video, Dr. Jason Fung explains why obesity is not a
caloric imbalance, but a hormonal imbalance—specifically involving insulin.
Most people believe that weight gain is a personal choice caused by eating too
much and exercising too little. But science tells a different story. Discover how
your body's internal thermostat (BMR) actually regulates your weight and why
lowering insulin, not calories, is the key to long-term fat loss.
In this video you will learn:
● Why the 'Calories In, Calories Out' model is scientifically flawed.
● How damage to the hypothalamus leads to massive weight gain
(independent of willpower).
● The role of Basal Metabolic Rate (BMR) in energy expenditure.
● How Insulin acts as a 'Fat Storage Hormone' and blocks lipolysis (fat
burning).
● Why simply eating less lowers your metabolism and makes you regain
weight.
medical Disclaimer: The content of this video is for educational purposes only
and is not intended to be a substitute for professional medical advice, diagnosis,
or treatment. Always seek the advice of your physician or other qualified health
provider with any questions you may have regarding a medical condition.
�� If you’re serious about losing weight without losing your health or youthful
look, this video is a must-watch.
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⏱️ Chapters / Timestamps
00:00 – The Big Lie: Why Do We Get Fat?
00:15 – The Energy Balance Equation Myth (CICO)
01:31 – BMR vs. Exercise: Where Calories Actually Go
02:41 – The Body Fat Thermostat: Lessons from Rat Studies
04:43 – Insulin is a Nutrient Sensor (Storage & Growth)
05:48 – Why High Insulin Blocks Fat Burning (Lipolysis)
06:24 – The Real Cause of Obesity: Hormones vs. Calories
08:00 – Why 'Eat Less, Move More'; Fails (Metabolic Adaptation)
09:15 – How to Fix Your Internal Weight Thermostat
10:11 – Conclusion: Insulin, Drugs, and The Obesity Code
=============================
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�� The Obesity Code – Reviewing underlying physiology of weight loss an
how low carb diets and fasting can help.
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�� YouTube Medical Lectures (for specialist physicians)
▶️ The Roots of the Obesity Epidemic: https: // • The Obesity Epidemic,
Explained
▶️ Therapeutic Fasting – The Two Compartment Problem:https: // •
Fasting and Weight Loss – Solving the…
▶️ Does Calorie Counting work?: • Why Calorie Counting rarely leads to
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Pre-order The Hunger Code at http://www.doctorjasonfung.com. Check out hunger management tools at http://www.drinkaeira.com
Hi Doc sorry to bother you have got a book regarding for kidney disease. I wanted to buy it to guide me on what I should do and what I should eat and everything else. Thank you so much. God Bless You.
Cant wait for book. He is going to be more active on social media to promote book which is awesome
Right? Nothing boosts social-media activity like a shiny new book on the way. He’s about to be everywhere-timelines, reels, maybe even your toaster screen. And honestly… I’m here for it
I been fasting for 5 years no lunch
And eating healthy no sugar and watching the carbs my sugar levels are still 10 12 3 month average is 9- 10
Why is that
Thanks Kevin
What are your Insulin and cortisol levels?
I learned a lot on March 1st, 2017 when Aetiology of Obesity appeared on my feed. Life changing. Thank you Doctor ! I’ll buy the Hunger Code too : I’ve been struggling since smoking cessation.
Go carnivore, get rid of all of the carbohydrates, all of the processed food, all grain and seed oils. Grass-fed meat if you can afford it, eggs from free-range chickens, a little bit of dairy if you have the pastoral gene and can eat it. You can have some seasonal organic fruit but make sure that it is seasonal, grown locally and picked ripe. When we pick fruit green and ship it, the oxalates, anti-nutrients, do not diminish.
Dr Fung is a fantastic resource. I read his book, the Obesity code, 11 years ago I think and that was the start of my weight loss journey.
Then I found keto, then carnivore. I started out somewhere between 330 to 360 pounds, I was in a scooter due to disability resulting from many surgeries, I was badly abused as a child and the surgeries were necessary. I was on so many medications, opiates, benzos, I had a bag of prescriptions.
Today I weigh about 185 pounds. I still have 10 to 15 pounds to lose. I bike everyday, I go to the gym 4 or 5 days a week, I’m not in a scooter and I’m not on any of those medications. I have two prescriptions left and I’m working on getting rid of those.
We can change our lives tremendously. We can reclaim our health. We can say that the idea of control is illusory and in some ways it is but we do have power to affect our lives.
There are other fantastic resources out there, Dr Anthony Chaffee, Dr Shawn Baker are both excellent.
Dr Chaffee has a presentation on YouTube, you can find it if you look for the corruption of our nutritional guidelines. That explains how we reach the point where meat and fat were demonized and carbohydrates pushed. I can’t recommend that talk highly enough. It’s on the longer side but the second half is questions from the audience, the actual talk is only about 35 minutes.
Thank you Dr.Fung
Thank you for your very clear scientific explanations. These are a great help and encouragement to me!
Doc, I understand and totally agree. But despite I regularly fast and my insulin is on the lower end, I can`t loose bodyfat …
Have you had your blood checked by a doctor? That’s the only way you can know what your insulin level is. Also, losing body fat is all about what type of “calories” you’re consuming. If you keep your carbohydrate levels consistently low you should be able to burn body fat. If you are already on a low carb diet such as keto or carnivore and are still not losing body fat then there is something else going on in your body that is preventing it from working as it was meant to.
Might be you are consuming excess (even if carnivora) calories. Cut down and see the result.
@PrasantaDatta-f3g While it is possible to over consume food on carnivore, it is very challenging to do so. You would literally have to force feed yourself with meat and eggs. Dairy, on the hand, is very easy to over consume.
@patrickh709 Losing body fat has nothing to do with the type of calories you’re consuming. You’re a CIM believer. We lose weight when we’re in a caloric deficit.
Stress causes cortisol ?!
I have your audiobook!….gonna go listen
This is SO well explained and very clear to understand. Part 1 & Part 2
Excellent thank you Doctor 😊
Glad you enjoyed it! When a doctor explains things so clearly you don’t need a dictionary, a notepad, and divine intervention… you know it’s good. 😄
I was so lost without you Dr Fung. Thank you for everything you are teaching us.
Dr Fung is a fantastic resource. I would recommend going carnivore, get rid of all the carbohydrates, processed food, all grain and seed oils. Ideally we would eat naturally grown, sustainably raised grass-fed meat, eggs from free-range chickens, a little bit of dairy if you have the pastoral gene and can eat it.
We can have seasonal organic fruit but it has to be seasonal, grown locally and picked ripe. When we pick fruit green and ship it, the oxalates, anti-nutrients, do not diminish. We also have to consider whether eating fruit will cause us to start craving carbohydrates again. I can have a few blueberries but if I eat mango it prompts sugar cravings because the fruit we have today bears no resemblance to what people ate a couple hundred years ago. It has been bred to be bigger and sweeter and contain more fructose. As you probably know, fructose is only broken down in the liver, non-alcoholic fatty liver disease didn’t exist a couple of generations ago.
It’s important to remember that we would eat fruit to fatten up for the winter, the lean times never come anymore, we’re told to eat fruit all year round and that results in a lot of metabolic sickness. We need to be in ketosis at least intermittently. Being in ketosis is anti-inflammatory, over 90% of healthcare dollars go to the maintenance of non-communicable chronic diseases that are the result of diet and lifestyle, primarily diet. Inflammation is a root cause.
I read Dr Fung’s book, the Obesity code, 11 years ago and that was the start of my weight loss journey.
Then I found keto, then carnivore. I started out somewhere between 330 to 360 pounds, in a scooter due to disability resulting from many surgeries, I was badly abused as a child. I was on so many medications, opiates, benzos, I had a bag of prescriptions.
Today I weigh about 185 pounds. I still have 10 to 15 pounds to lose. I bike everyday, I go to the gym 4 or 5 days a week, I’m not in a scooter and I’m not on any of those medications.
Two other resources I would recommend are Dr Anthony Chaffee and Dr Shawn Baker. I would especially recommend Dr Chaffee’s presentation, the corruption of our nutritional guidelines. It explains how we reached the point where meat and fat were considered bad for us and carbohydrates pushed. I can’t recommend it highly enough. If you look for those keywords you’ll find it.
Dr Jason fung is truly a man that should be commended for his work. Thank you very much sir you have taught me alot
Absolutely — Dr. Fung deserves a standing ovation… preferably a fasted one. The man’s turned complex science into “Ohhh, that actually makes sense,” and we’re all better for it. 👏😄
Jason Fung: teaching so those of us too poor for Ozempic can still get leaner
Not just the money, but the healthy way of doing it
They are going to regret taking in in the long run.
Carnivores lose FAT faster without sacrificing bone density, muscle mass, etc, and you get healthier.
@JBigger-l4y it’s hard enough to get my daily protein without having my stomach be paralyzed.
You’ll be more healthier in your body and your pocketbook without the Ozempic!
This just works full stop. I’m 4 stones down in 7 months & totally reversed my Psoriasis which is why i started this journey. Eating the right foods & fasting is the best thing I’ve ever done. More energy, not hungry during fasting & i feel a million dollars. You can 100% eat yourself healthy & i have to thank my dermatologists for the great advice 👍
I think you meant to say about the mice studies is that the foraging for food is a physiological response outside of our control, that willpower alone cannot and will not override biology.
It is something I’ve heard often: That Insulin is one of the drivers for storing sugar allowing it to enter the cells, however, insulin is not directly responsible for fat storage, and we’re told that insulin spike is responsible for us to store fat (so far, I agree). Fat doesn’t make insulin go up hardly at all, nothing even similar to what sugar will do. Fat has 9 Calories per gram and Carbs (sugar) has 4, and that means that even when eating low-fat foods the glucose is turned into fat and it’s _that_ fat that is stored. If sugar has 4 Calories per gram, it is converted into something that has 9 Calories per gram; Does that mean it takes 2 grams sugar to make 1 gram fat?
I pointed out on the last video that CICO equation that the units of energy on the right side is storage of mass on the the other, that 3500 Calories = 1 pound of body fat, and even that number of 3500 is disputed and hard to account for. Maybe there’s some other factors not included with that equation, there has to be some hidden variables.
Thank you for all you do 🙏!
Was on ozempic 3 months,made me sick as a dog 3 months,,just received your book in the mail yesterday,,hoping to get an education 😊
So sometimes I eat not because I’m hungry but because I feel the desire to eat junk food
As a type 2 diabetic, nothing got me to lose fat more than OMAD and keto. Nothing. That shows how insulin resistance affects fat releasing ability, at least for me.
Your loss of fat cells decreased your insulin resistance not the other way around. I think Jason is trying to present something novel that people haven’t figured out yet, to try and sell books. You were able to lose weight because you happened to have been eating fewer calories on OMAD and keto.
@dan-qe1tbhow do you know? Do you do OMAD? Have you fasted?
@dan-qe1tb
I’d think this was true, if I didn’t test it (and plenty others have too) where I eat the same exact amount of calories in both situations, but one is OMAD and one isn’t.
I magically lose weight (and feel better overall) in the OMAD scenario.
And yes, I tracked my calories exactly. I didn’t under or over report. I had the same exercise levels in both. I didn’t sleep more or less in either. No medication differences. No material differences in lifestyle at all.
Can you explain that then?
@CertifiedSlamboyYour situation mirrors mine, with OMAD, the insulin levels fall, which then causes fat to be used for energy…
@dan-qe1tb I eat ketogenic, don’t do OMAD, feel much fuller than I did on a carbohydrate-based diet AND am losing weight, or rather, am now permanently slim.
GOOD JOB, BRO !
You are my savior Jason. I’m fighting pre-diabetes (hereditary). I’m following your advice and things are going well! Huge thank you ! 🙏🏻
I am also a prediabetic, it’s also hereditary for me. Jason’s is a nephrologist and not an endocrinologist and not a diabetes researcher. I have had a little bit of success with IF and nothing else; not for weight loss but for glycemic control. It’s because when we eat less often, there’s a bigger insulin response after meals. Jason’s sugar bowl analogy from previous videos was ridiculous: the idea that our blood sugar rises after every meal and then so it must fall when we don’t eat. I think he might have deleted those ones. It’s ridiculous because our livers make glucose all the time, or we would die. The other idea that’s ridiculous is the one presented in The Diabetes Code that eating carbs causes diabetes. That idea may seem like a no brainer at first (that when we eat too many carbs, our bodies can’t handle it and the sugar piles up in our blood), but it’s a complex, multifactorial condition. The low insulin producers are rarer than the T2s, and can usually be spotted easily: these are the people who ate a lot but never gained much weight when they were younger (often made fun of in school), and the people who lift heavy weights at the gym but can’t build anywhere near the mass of some other men. Good luck. I hope you’ve had fasting insulin, c-peptides, fructosamine and HOMA-IR checked by now.
@dan-qe1tb I don’t do intermittent fasting. I follow his advice on how to eat and what to eat. It is simple to follow and quite beneficial – already lost 10kg
Thanks Dr. Fung! I have given up sugar, only eating non-processed food, and do timed interval eating – usually 16:8. I have also done a few 36 hour fasts. In under 3 months I have lost 35 pounds, and feel great.