Approximately one-third of adults in the US consume fast food on any given day ... they're not all one and the same. Here are 10 facts you didn't know about this beloved, greasy take-out item!

One early fast food slogan to catch on came courtesy of the White Castle hamburger chain. The small, square-shaped patties ...

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We see it most everywhere we go -- in grocery and convenience stores, fast-food restaurants, on television -- usually looking very appealing. But just what are the facts about junk food?