Genetically engineered foods. Novel foods, including those altered using biotechnology, should not differ 'significantly' from the foods they are to replace. Labels should not be misleading, but must make clear any differences between the novel food and its 'conventional' alternative, and must say how that difference was achieved. Foods containing a genetically modified living organism, such as a live yogurt made with an altered culture, would always be labelled. Any food whose modification might raise moral or health worries to consumers would also have to carry a label. This would include genes from an animal considered unclean by some religions, or from a plant that might cause allergic reactions. However, foods which, although made using novel methods, are identical to conventional foods, would not have to be labelled.