A variety of genetically modified corn not approved for human consumption has been found in Safeway brand taco shells, just weeks after a similar finding in Taco Bell brand taco shells, says the Genetically Engineered Food Alert, a coalition of consumer and enviro groups. Like Kraft Foods, maker of the Taco Bell shells, Safeway has agreed to recall its product. The Starlink corn variety, engineered to contain a toxin that kills insects, has been approved for livestock feed but not for human food because it may cause allergies or prove hard for people to digest. “The [U.S. Food and Drug Administration] is doing a miserable job protecting the American food supply,” said Larry Bohlen of Friends of the Earth. Enviros are pushing for mandatory safety testing of genetically engineered crops and mandatory labeling of foods that contain them.