I recently returned from a trip to America. One of the things I noticed while eating in restaurants was the huge quantities of food served for individual meals.I also observed an odd thing about attitudes toward food..it is either toxic or fuel...neither of which is culturally true..I don't think. Sugar is not toxic, nor is salt, or fat, in moderation , these things are are not bad for us. We simply need to eat less and regard food differently. As for genetics, many studies suggest that a very low proportion of obesity is the result of a genetic "disorder". However, it may be caused by a lifestyle "didorder"..eating too much.