Testing, recalling and replacing products containing the banned biotech corn StarLink could cost US food companies hundreds of millions of dollars. Almost 300 products are being recalled from supermarkets and foodservice outlets after it emerged the corn, which has only been approved for animal feed and industrial purposes, has found its way into taco shells, tortilla chips and tostados on sale at Wal-Mart, Safeway, Albertson's, Kroger and Food Lion. At this stage it is unclear which part of the supply chain will have to foot the bill. StarLink has not been approved for human consumption amid concerns it can cause allergic reactions. Lawsuits from angry customers claiming to have reacted adversely to the products are already flooding in, and all parties are pointing the finger at each other. Aventis, which markets the corn, says seed companies are responsible for ensuring biotech corn does not contaminate conventionally grown varieties. But government officials say Aventis failed to ensure cross-pollination didn't take place. Exports bound for Japan are now being tested after a Japanese consumer group found traces of the banned corn in a baking mix. After traces of banned biotech maize produced by US biotech giants Monsanto and Dekalb were detected in tortilla chips sold in the UK this week, the Food Standards Agency has warned grain importers could face large fines if they sell food with unapproved GM content. {{NEWS }}