Obesity — a historical perspective

Dr. Jason Fung
6 min readJun 12, 2017

What is really the cause of obesity (the aetiology of obesity)? This is not a question most people think about because they assume they already know the answer. Too many calories causes obesity, they think. Of course, if it were true, then cutting calories would reverse the obesity epidemic. That, unfortunately, did not happen.

The entire obsession with calories was a 50 year dead end. We can only start to address the problem of weight loss and gain by understanding the real causes. So what is the real cause of obesity? Let’s go back in time and see what people thought…

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Dr. Jason Fung

Nephrologist. New York Times best selling author. Interest in type 2 diabetes reversal and intermittent fasting. Founder www.TheFastingMethod.com.