Food professionals will tell you: Eating asks a lot of your body. iStockphoto.com hide caption

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Environmental groups say a ban would protect consumers from the health effects of BPA that leaches from products including some soup cans. Chip Somodevilla/Getty Images hide caption

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A member of the community supported agriculture program at Congregation Shearith Israel picks from boxes of squash and cucumbers in Atlanta. Some purists say CSAs are drifting away from their roots. John Amis/AP hide caption

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An oyster shucker on Samish Island, Wash. on Puget Sound. The state is frequently forced to close beaches to oyster gatherers because of the risks of harmful algae blooms. Ted S. Warren/AP hide caption

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Lean finely textured beef, made by Beef Products Inc., shown before packaging. AP/Beef Products Inc. 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

itoggle caption Ren Haijun/Xinhua /Landov