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A woman shops at a supermarket in New York City. Spencer Platt/Getty Images hide caption

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Allen Williams grows corn and soybeans for Clarkson Grain, which has been selling GMO-free grain to Japan for years. Dan Charles/NPR hide caption

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After Grist's six-month-long series on genetically modified foods, some loyal readers accused the site of changing directions in the debate. iStockphoto hide caption

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Soon after being sliced, a conventional Granny Smith apple (left) starts to brown, while a newly developed GM Granny Smith stays fresher looking. Courtesy of Okanagan Specialty Fruits Inc. hide caption

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Labels on bags of snack foods indicate they are non-GMO food products. Robyn Beck/AFP/Getty Images hide caption

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Genetically modified to be enriched with beta-carotene, golden rice grains (left) are a deep yellow. At right, white rice grains. Isagani Serrano/International Rice Research Institute hide caption

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A cornfield is shrouded in mist at sunrise in rural Springfield, Neb. Nati Harnik/AP hide caption

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An Argentine farmer stands by his field of trangenic soy, designed for resistance to drought and salinity. Juan Mabromata/AFP/Getty Images hide caption

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Wheat grows in a test field at Oregon State University in Corvallis. Some scientists believe that there's a chance that genetically modified wheat found in one farmer's field in May is still in the seed supply. Natalie Behring/Bloomberg via Getty Images hide caption

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Russ Kremer with some of his hogs on his farm in Frankenstein, Mo., in 2009. Instead of buying conventional feed, Kremer grazes his hogs in a pasture, and grows grains and legumes for them. Jeff Roberson /AP hide caption

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Farmers harvest a sugar beet crop in Gilcrest, Colo. Matthew Staver/Landov hide caption

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Genetically modified to be enriched with beta-carotene, golden rice grains (left) are a deep yellow. At right, white rice grains. Isagani Serrano/International Rice Research Institute hide caption

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A farmer holds Monsanto's Roundup Ready soybean seeds at his family farm in Bunceton, Mo. Dan Gill/AP hide caption

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Protesters demonstrate against the production of genetically modified food in front of a Monsanto facility in Davis, Calif., in March. The local protest was not specifically about labeling. Randall Benton/MCT /Landov hide caption

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People march demanding labels for genetically modified food near the White House in Washington, D.C., on Oct. 16, 2011. Ren Haijun/Xinhua /Landov hide caption

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