If you are invited to a party just mention genetically modified (GM) food and you will be center of the crowd. There are many national and internationally bodies that deal with GM food (see the dissertation of Scholderer). As far as we do not know what makes and allergen and allergen, I would always care when introducing any modification. There is a way round, however, that GM food can also have less allergen content – just found a preprint of a gene-silenced tomato. This German-Spanish group managed by RNAi silencing to reduce protein Lyc e 3 with led to reduced skin reactivity of tomato allergic probands. BTW – do you renember our fake food hypothesis? Yea, yea. BTW The best tomato bread can be found in Barcelona.