GAO's report on Genetically Modified Foods
GM foods pose the same types of inherent risks to human health as conventional foods: they can contain allergens, toxins, and compounds known as antinutrients, which inhibit the absorption of nutrients. Before marketing a GM food, company scientists evaluate these risks—even though they are not routinely evaluated in conventional foods—to determine if the foods pose any heightened risks. While some GM foods have contained allergens, toxins, and antinutrients, the levels have been comparable to those foods’ conventional counterparts.