Seems that a Professor Dhurandar in Lousiana, USA has found that a comman adenovirus, AD 36 is responsible for obesity in humans. Before this we have OB genes and a hormone called leptin which have been held responsible. Obesity is compatible with a life long enough to produce children therefore one would expect many people to have the OB gene, low levels of leptin and then to be infected with AD 36 and these people would be lucky enough to pile on the pounds with just a slice of bread with a drop of lemon juice. In fact this would be so advantageous that one would have thought that the evolutionary advantage would have humans belonging to this select combination only. In fact with improving technology one could breed such humans and a farm in Lousiana could feed the entire human population. The sad truth is that fat comes from excess intake of calories and fat people eat too much. It is possible that their metabolism being more efficient they need less calories rather like a hybrid car but no one gets fat without eating. Truly fat people all over the world behave in exactly the same way. They deny eating too much, steal food when no one is looking and binge from time to time. They behave exactly like addicts. Unfortunately there seems to be some crazy political correctness which is preventing even scientists from telling the truth. Once truth is accepted and fat people are seen to be food addicts then treatment would probably follow.