In fact, GM food products are among the most tested products in history.
A meta-study of more than 1,700 peer-reviewed studies found no evidence that GMO crops produce adverse affects in humans or livestock. And a recent review of 29 years of livestock health and productivity statistics—looking at relevant data from both before and after the introduction of genetically engineered feed and covering more than one billion animals—concluded that GM feed is every bit as safe and nutritious as non-GM.
Based on peer-reviewed evidence, the World Health Organization, the American Medical Association and the British Royal Society, among others, have all concluded that foods containing GM ingredients are as safe as the same foods containing ingredients from crop plants modified by conventional techniques.