A lot of it too is their eating foods that make them both hungry and fat. It may be gut bacteria, such as candida, as well as ignorance due to government misinformation campaigns, causing them to do so.
To me, it is a very promising discovery.
1) Perhaps the obese will be able to change their gut bacteria by changing their choices of foods.
2) Or....Changing the gut bacteria will be the reason that the hunger hormones in the obese are lessened. That is what is happening in the obese and thin mice studies.
Children whose homes do not have dishwashers are thinner than children whose moms use dishwashers. Maybe, dishes that are less sterilized tend to promote gut bacteria that is more healthy.
I often wonder about salads bought in the store that are sooooooo clean that they are ready to eat. Maybe, I should start shopping at the local farmer's market. ( My mom bought her veggies from the huckster who came through the neighborhood twice a week.)