What causes obesity?

What is the real cause of obesity? What causes weight gain?

It surely is not excess calories – that’s just a description of how people gain weight. It does not explain why, so it’s not helpful. Dr. Fung gets into the REAL cause in this presentation.

This talk has only been available for our members before (check out our free trial), but now everyone can watch it above.

Table of contents

  2:10  Why are there fat doctors?
  4:10  What causes weight gain?
10:15  The ultimate cause of obesity – the unspoken accusation
16:09  The biology of human starvation
18:55  Metabolic rate and calorie reduction
21:45  Not lack of willpower
24:05  The cruel hoax
26:00  Hormonal obesity
28:40  Insulin and weight gain
37:05  A new hope



Here’s what our members have said about the presentation (besides giving it a 4.8 / 5 rating).

What a fantastic presentation. Thank you!
– Alan

Always delivering the goods, thanks Dr. Fung!
– Anne Marie

If only everyone knew this! Will be telling my friends about it! Thanks Dr Fung for yet another great presentation!
– Anne

A New Hope, A New Dawn! Absolutely! Keep up the great fight Dr. Fung!
– Nancy

The real problem is selling this to patients with the current medical, agricultural and pharmacological business models.
– Pete

Yes, what a great, funny, didactic presentation! Thank you! You are a bless!
– Teresa

I just finished reading his book and I must say it is brilliant! Dr. Fung is a fantastic public speaker, talented writer and spectacular professional!
– Manuela

More from Low Carb Vail

Seven Tips to Make Low Carb Simple – Dr. Rangan Chatterjee
The Engineer Who Knows More Than Your Doctor – Interview with Ivor Cummins
LCHF and Diabetes – Dr. Eric Westman
The Food Revolution 2016 Update – with Dr. Andreas Eenfeldt
Practical Lipid Management – Dr. Cate Shanahan
LCHF and LDL – Dr. Sarah Hallberg
Healthy Food for Your Family – Jenni Callihan
Low Carb Was the Only Thing That Helped – Interview with Benjamin Kuo
Reversing Diabetes by Ignoring the Guidelines – Dr. Sarah Hallberg
Is High Cholesterol Dangerous on a Low-Carb Diet? – Dr. Sarah Hallberg


More with Dr. Jason Fung

What is Fasting? – Dr. Jason Fung
How to Get Started with Fasting – Dr. Jason Fung
How to Reverse Diabetes Type 2 – Dr. Jason Fung
How to Maximize Fat Burning – Dr. Jason Fung
How to Fast – The Different Options – Dr. Jason Fung
The 7 Benefits of Fasting – Dr. Jason Fung
The Top 5 Myths of Fasting – Dr. Jason Fung
Breakfast! Is It Really That Important? – Dr. Jason Fung
The Most Common Questions – Dr. Jason Fung
5 Tips to Make Fasting Easier – Dr. Jason Fung
Who Is Dr. Jason Fung?
The Power of a 7–Day Fast – Dr. Jason Fung
The Perfect Treatment for Weight Loss and Diabetes – Dr. Jason Fung
The 2 big lies of type 2 diabetes – Dr. Jason Fung
The Key to Obesity – Dr. Jason Fung


  1. Cindy C
    Thanks for making this available. At least some scientists are looking more at metabolism, instead of just at calories.


  2. Vicente
    11:15: "The proximate cause is still too many calories"

    This is a huge mistake. The proximate cause is that more triglycerides enter your fat cells than exit.

    "Too many calories" is a description of net energy accumulation in the body, not a description of fat accumulation in the adipose tissue. They are not equivalent.

  3. Vicente
    when a tumor grows, is the proximate cause "too many calories"?

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