There are some legitimate areas of concern over GMOs, such as the evolution of superweeds in response to herbicides, pollen contamination (which could lead to less biodiversity), the potential for genetically based allergens to be introduced into new foods, pesticides lingering in the soil long after harvest, increased potential for antibiotic resistance, and so on. Scientists are working on all of these. These problems notwithstanding, no scientific study has ever shown that GMO foods are unsafe to eat.
