This is Part 2 of a five-part series. Click here for Part 3.
Most breakfast cereal contains corn that's been tweaked.
Two-thirds of all processed food has some genetically altered ingredients. Probably the most recognized genetically engineered crop is Starlink. The contamination caused an upheaval because the corn contains a gene that allegedly triggered several allergic reactions, some quite severe. So has all Starlink corn. But farmers are still finding traces of the modified corn in their crops.