It's all the damn GMO refined wheat and other "fillers" in our so-called "foods". Plus, sugar on top of sugar and all this artificial crap to make non-food taste and look like food.
Look at pics of people up to the 70's; mostly slim to moderate chubbiness, seeing grossly overweight folks was rare. Now look at a crowd of people today. Fat, fat, and fat. Everyone is getting thicker because of all the bread and sugar we consume, compounded by sedation, apathy, and a daily handful of pills just to function and get through the goddamned day.
True. Another big difference is portion size. People ate much smaller portions at meals up until the 80's. The size of dinner plates has grown, and people pile on the food until they can't even see the plate underneath. And there is more fast food restaurants now than ever. Back in the day, McDonalds was considered a kid's restaurant where parents would take their kids to eat. McDonalds made a clever move and got rid of the gimmicky characters (Grimace, Hamburgler, Mayor McCheese, etc) and made the franchise into something that adults would go to on their own without feeling silly. After they did that, business increased significantly, along with the waistlines of many people who eat there.