GM food might have allergic reaction which could be exposed to grave danger or some GM food might be resistant to antibiotics which virus will be immune thus alleviating this danger. The genes of the crops might spread to weeds and cause having "superweeds" which is immune to herbicides and will affect the crops. Gm food which contains protein toxic to insect pest. However, exposing toxic to pests will help the pest develop resistance and thus render pesticides useless. GM food has resistance to pest unlike normal crops. GM food also can be resistant to cold and diseases which could destroy normal crops. It contains more nutrition vitamins and minerals.