in these topics, we tried to explain the main causes of obesity. Why someone getting obese or overwieght very quickly and someone not. How much these causes are preventable, how much they are genetic and how much depend on person.
Stephen O’Rahilly (Cambridge) 1: The Causes of Obesity: Why Isn’t everybody fat?
I am sure sometimes you think why he is obese and another one not, if you want to know reply for this question, please watch this video.