When he sees a spirit, he says that it's just a piece of undigested beef causing him to hallucinate.

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The Pringles Light chips are made with olestra, a synthetic fat substitute that has zero calories and passes through the body undigested.

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The trouble for Reno and the FBI is not so much with what's out there as with the facts that may still be undetected and undigested in their files.

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The paper, which is turned into wrapping paper, wine bags, journals and Christmas ornaments, is thick, textured and occasionally flecked with small stones and hair-like fibers because 70% of what an elephant eats can pass through its body undigested.

FORBES: Waste? Not!