MON863 is a genetically modified maize line, not a toxin.
Each genetically modified food is assessed for safety on a case by case basis before it is approved for marketing. This includes a consideration of the genetic modification itself and resulting protein and toxicology, nutrition and allergenicity studies. A wide range of safety data on GM maize MON863 was assessed by the European Food Safety Authority's genetically modified organism panel, which concluded that the maize would have no adverse effect on human health. This conclusion was endorsed by the United Kingdom advisory committee on novel foods and processes.