The U.S. EPA indicated on Friday that it would not permit even trace amounts of genetically modified StarLink corn into human food. StarLink, which was previously approved for use as animal feed, was found to have entered the food supply last year, prompting the costly recall of taco shells and other corn products. Despite a request by the maker of StarLink, Aventis CropScience, to ease restrictions on its product, the EPA stuck with its current ban after an advisory panel concluded that there was not enough evidence to rule out possible allergic reactions to the corn in human food. Enviros celebrated the decision, while the Grocery Manufacturers of America lashed out against it.