Oprah Winfrey arrives at the 87th Academy Awards nominees luncheon at the Beverly Hilton Hotel on Monday, Feb. 2, 2015, in Beverly Hills, Calif. Jordan Strauss/Invision/AP hide caption

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Woman weighing herself. ImageZoo/Corbis hide caption

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Sure, these Buffalo-chicken-and-kale-stuffed mushrooms look tasty, but they aren't the giant bowl of salt and corn syrup your brain really, really wants. Matthew Mead/AP hide caption

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Belviq, a weight-loss drug from Arena Pharmaceuticals, was approved by the Food and Drug Administration in 2012. With the agency's approval of Saxenda in December, there are four new weight-loss pills available. Arena Pharmaceuticals Inc/Reuters/Landov hide caption

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Even versions of Zi Xiu Tang Bee Pollen labeled "genuine" and "anti-counterfeit" have been found to contain the drug sibutramine, which was supposed to come off the U.S. market in 2010 for safety reasons. Food and Drug Administration hide caption

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