In studies that were conducted on rats and baby chickens in which one group was given entirely GMO feed while the others were given exclusively non-GMO feed, the subjects fed only GMOs all died for unknown reasons.
You would hope that necessary studies on humans would be conducted before products made with these substances are put on the grocery shelf. However, according to Mothers For Natural Law, “There are about 40 varieties of genetically engineered crop approved for marketing in the U.S. As a result, 60–70% of the foods on your grocery shelves contain genetically engineered (GE) components.”