[FriedrichN]

We never had much money, but we ate well. And I ate a lot, but I was also very active. Being active is free.

I know this will upset people, but if poor people are fat, food is not scarce. The quality of food may be low, but low food quality does not make one fat, a surplus of calories does.

To be absolutely clear, I know there is a strong correlation between socioeconomic status and obesity. It's much more complicated than "just eat less", many factors play into this. Including food IQ. It's much more easy to overeat on Cheetos than it is on potatoes and green beans. A persons social environment will have a big influence on how and what they eat, how much they will move, etc.

[CRConrad]

> The quality of food may be low, but low food quality does not make one fat, a surplus of calories does.

That low quality food is food with a surplus of calories. That's a large part of what makes it low quality.

[MattRix]

Low quality food absolutely can make you fat because it makes it harder to eat properly. Unhealthy food isn’t just “easier to overeat” but also messes with insulin to make you feel more hungry than you actually are.