[ethbr1]

> People can get fat by eating too much healthy food.

It's a lot harder, as many of the comments mentioned, because of caloric density and lack of appetite hacks (sugar, salt).

A can of Mountain Dew is 170 kcal + 46g of sugar.

A navel orange is ~75 kcal + 13g of sugar + 3.2g of fiber + 1.25g of protein.

So take someone from Appalachia with a 4 can / day habit (modest), and that's ~10-12 oranges. That's a lot of oranges to not get sick of eating.

Which is where I think the sugar + salt difference comes in.

It's far easier to overload on the same food when it's stuffed with these appetite attractants than a caloric equivalent of healthy food, because the health food will taste more similar (read: like itself), which will eventually get boring.