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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A meta-analysis found that people on vegetarian diets lost around 4.4 pounds more than the control group (who had no change in diet), while those who went vegan dropped 5.5 pounds more. Marcus Butt/Ikon Images/Corbis hide caption

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The Mediterranean-like DASH and the plant-centric Ornish eating plan topped this year's rankings of diets by a panel assembled by U.S. News & World Report. Gillian Blease/Getty Images/Ikon Images hide caption

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The 7-Day Color Diet: An attempt to get people to eat more fruits and vegetables, this diet requires followers to eat foods of just a single color each day. It ends with a day in which you "eat the rainbow," so to speak. Here's Gonot's cheeky take on orange day. Stephanie Gonot/Courtesy of the photographer hide caption

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Illustration by Tim Robinson for NPR

How To Find A Path Off The Dreaded Diet Plateau

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Front-loading your calories may help you lose weight. Gaelle Cohen/iStockphoto.com hide caption

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To Maximize Weight Loss, Eat Early in The Day, Not Late

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