i've seen obesity skyrocket the past twenty years. the biggest factor is seed oils in the food supply. mcdonald's fries used to be cooked in beef fat. just as an example. teens and twenty somethings weren't that fat back in the eighties or early to mid nineties. obese waddlers were freak show rare. everyone lived on junk food. suburban living was already a thing. the biggest change was in the type of oils allowed in the food supply.
Canada