-Allergenicity (having an effect of an allergen) *none found now -Gene transfer *if antibiotic resistant genes, used in GMO's, were transferred -Outcrossing *movement of genes from GM plants into crops may have an effect in food safety
-Not a "natural" taste -cross pollination -More resistant "super pests" -GMO's may cause unknown health problems -Possible damages to the environment -New allergies may developed