Leah Lizarondo. with her hands covered in plastic bags, gathers stinging nettles. Larkin Page-Jacobs for NPR hide caption

itoggle caption Larkin Page-Jacobs for NPR

The fact that Nutella's parent company, Ferrero, is known for its chocolates might be a tip-off that the sweet hazelnut spread isn't exactly "health" food. STEFANO RELLANDINI/Reuters /Landov hide caption

itoggle caption STEFANO RELLANDINI/Reuters /Landov

Cattle feeding practices have been changed in an effort to halt the spread of mad cow disease. hide caption

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Cielito Lindo's famous taquitos are made fresh to order at the well-known taco stand in downtown Los Angeles. Carolina Miranda/NPR hide caption

itoggle caption Carolina Miranda/NPR

Miller Farms in Maryland is a family-run operation that sells its home-grown vegetables at farmers' markets and local grocery stores. Phil Miller, whose family owns the farm, says he's trying to earn a food safety certification now required by many food buyers. Maggie Starbard/NPR hide caption

itoggle caption Maggie Starbard/NPR