The SciencesThe Risks on the TableMore than half the foods in U.S. supermarkets contain genetically modified ingredients. Have they been proved safe for human consumption?By Karen Hopkin on April 1, 2001AdvertisementABOUT THE AUTHOR(S)Karen Hopkin is a freelance science writer in Somerville, Mass. She holds a doctorate in biochemistry and is a contributor to Scientific American's 60-Second Science podcasts.Recent Articles by Karen HopkinTrying to Train Your Brain Faster? Knowing This Might Help with ThatParrot Babies Babble Just like UsThe Scientific Secret to Soothing Fussy Babies