Uploaded December 2025 | Updated September 2026, 2 weeks ago
Pre-order The Hunger Code at www.doctorjasonfung.com. Check out hunger management tools at 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.
�� Subscribe now for more science-backed videos on fasting, weight loss, an
metabolic health. And don’t forget to like ��, comment ��, and share this vid
with anyone who still believes in the calorie deficit myth!
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
⏱️ 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
=============================
�� BOOKS:
�� The Obesity Code - Reviewing underlying physiology of weight loss an
how low carb diets and fasting can help.
https://www.amazon.com/dp/1771641258?...
�� The Diabetes Code - Reviewing how type 2 diabetes is a reversible
disease and dietary strategies. https://www.amazon.com/dp/B0795BLS8D?...
�� The Cancer Code - Scientific exploration of how cancer develops
https://www.amazon.com/dp/0062894005?...
�� Amazon:
�� USA - amazon.com/shop/jasonfung
�� Canada - amazon.ca/shop/jasonfung
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� Please visit our :-
�� Website - doctorjasonfung.com
�� Blog- / drjasonfung
�� Community- thefastingmethod.com
�� Facebook - / jason.fung.313
�� Instagram - / drjasonfung
�� Twitter - / drjasonfung
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� 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
...
▶️ Two Big Lies of Type 2 Diabetes: • Two Big Lies about Type 2
Diabetes
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
If you liked the video, Please Do Subscribe My Channel ����
Keep Supporting me So I can Continue to provide you with free content
each week!!��
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� �� Thank you for Watching
#DrJasonFung #TheObesityCode #WeightLoss #InsulinResistance
#CaloriesInCaloriesOut #Metabolism #IntermittentFasting #LowCarb
#HealthEducation
Pre-order The Hunger Code at www.doctorjasonfung.com. Check out hunger management tools at 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.
�� Subscribe now for more science-backed videos on fasting, weight loss, an
metabolic health. And don’t forget to like ��, comment ��, and share this vid
with anyone who still believes in the calorie deficit myth!
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
⏱️ 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
=============================
�� BOOKS:
�� The Obesity Code - Reviewing underlying physiology of weight loss an
how low carb diets and fasting can help.
https://www.amazon.com/dp/1771641258?...
�� The Diabetes Code - Reviewing how type 2 diabetes is a reversible
disease and dietary strategies. https://www.amazon.com/dp/B0795BLS8D?...
�� The Cancer Code - Scientific exploration of how cancer develops
https://www.amazon.com/dp/0062894005?...
�� Amazon:
�� USA - amazon.com/shop/jasonfung
�� Canada - amazon.ca/shop/jasonfung
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� Please visit our :-
�� Website - doctorjasonfung.com
�� Blog- / drjasonfung
�� Community- thefastingmethod.com
�� Facebook - / jason.fung.313
�� Instagram - / drjasonfung
�� Twitter - / drjasonfung
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� 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
...
▶️ Two Big Lies of Type 2 Diabetes: • Two Big Lies about Type 2
Diabetes
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
If you liked the video, Please Do Subscribe My Channel ����
Keep Supporting me So I can Continue to provide you with free content
each week!!��
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
�� �� Thank you for Watching
#DrJasonFung #TheObesityCode #WeightLoss #InsulinResistance
#CaloriesInCaloriesOut #Metabolism #IntermittentFasting #LowCarb
#HealthEducation
