Cans of fruit-flavored Four Loko in the liquor department of a convenience store in Miami in 2010. Joe Raedle/Getty Images hide caption

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Lazy Cakes, now sold as Lazy Larry, contain melatonin. The Food and Drug Administration says that ingredient, which helps regulate sleep, is not an approved additive for food. herbalcity.com/lazycakes hide caption

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The regulation of medical devices bears a passing resemblance to this giant version of the Rube Goldberg-style game Mouse Trap. Bill Ward/Flickr hide caption

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From left, Priscilla Howard, Crystal Hanna and Nancy Haunty, all breast cancer patients, listen at a Food and Drug Administration hearing on Avastin in Silver Spring, Md., on Tuesday. Joshua Roberts/Bloomberg via Getty Images hide caption

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New York plastic surgeon Brad Jacobs holds a silicone gel breast implant in 2006. That year the FDA allowed silicone implants back on the market, after a 14- year hiatus. Spencer Platt/Getty Images hide caption

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