Only people who have never had a significant weight problem could possibly think it's a simple choice. Weight is the last legitimate predudice. People can comment, criticise and ridicule overweight persons without being challenged about that. Try doing it about any other group! Given the social stigma and predudice experienced by anyone overweight, aside from the regular 'lets not give them medical care', 'allow them to foster children' etc, if it was straightforward to lose weight and keep it off, do you think there would be any overweight people in our society? There is a genetic factor in body shape and size can easily been seen in many relatives, including those who haven't lived together and shared the same diet. In my own family, my body shape can be seen several generations back on the paternal side, despite all of my father's relatives having lived in a different country, with a different diet. In addition, when I was a child, there were no inhaled steroids for Asthma, so I was given oral steroids from being an infant, until adolescence. As an adult I developed hypothyroidism and more gained weight. That was eventually treated of course. Now, two of the medications I have to take for other medical issues have the side effect of weight gain! I am now an overweight 57-year-old. I eat less than many slim friends. I dieted for years, and had to severely limit food intake to an unsustainable level in order to lose weight. Whenever I increased my intake to a more normal level, I regained the weight and more. Looking back, if I hadn't repeatedly dieted, I would weigh much less today! There are other physical health conditions and medications that lead to people being overweight, and, as others have mentioned, psychological disorders too. Frankly, it makes me angry to hear sanctimonious comments about how it's a choice and overweight people should simply not be allowed this and that until they lose weight!