While the notion that too many people in the U.S. are fat is by now a truism, it's hard to comprehend the magnitude of the problem -- or how quickly obesity has crept up on Americans.

To get that perspective, have a gander at the annual "F as in Fat" report from the Trust for America's Health and the Robert Wood Johnson Foundation. It shows that adult obesity rates climbed in 16 states last year and didn't fall in any state.

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