[Groxx]

The only thing I can think of is canned fruit/peppers but they are definitely more expensive than the caloric equivalent of junk food.

Well yeah, but this is a study on obesity, which means they're getting too many calories compared to nutrients. And quite frankly, if they can't control themselves in the starve-binge cycle, which probably contributes significantly to the lack of food money, and can't tell that something harming them is harming them, then any evolutionary standpoint sort of demands they stay there. Meanwhile, those typically-poorest locations are most heavily targeted for food kitchens and support money, but many are too proud to take help that's offered.

And, if there's not a portion of stupidity, how do some get out of poverty? And explain the increased drug and alcohol use in such areas.