Food today is made in the millions of pounds. Raw meat and other raw foods are delivered by the train car load and truckload and generally are not touched by human hands until the end consumer opens the package. Picture a 12" cubed box. Drop a BB into it. That BB could represent the amount of GMO foodstuffs in your corn chips, bread, etc. out of the 100,000 tons of raw corn or wheat that went into that batch of corn chips or flour used to make the finished product. The maker isn'y going to run genetic tests on the raw foods. They wouldn't be any good anyway. Hw do you pick out which grain to test? Can genetic testing determine if there's GMOs in your flour or corn meal? I doubt it. Will the things anti GMO people cry about survive the manufacturing process? Can genes survive being bake or fried or do they become sterile?