Dietary fats and cholesterols build up there, making the membrane rigid and impeding the fluid movement of chemicals within it.

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Gone is the mid section of fruits and veggies narrowing to the tiniest peak of fats, sweets and oils built on Bush-era dietary research that all fats were bad fats.

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Rocco Papalia, senior vice president of technology for Frito-Lay, tracks dietary trends, like the backlash against trans fats, that may change the way people eat snacks.

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Rocco Papalia , senior vice president of technology for Frito-Lay, tracks dietary trends, like the backlash against trans fats, that may impact the way people eat snacks.

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