2. Don’t stop there. Read ingredient labels to look for derivatives of those crops commonly found in packaged foods. These include corn flour, corn oil, corn starch, corn syrup, fructose, dextrose, and glucose, modified food starch, soy flour, lecithin, soy protein, soy protein isolate, and isoflavone. Also look for cottonseed oil (as much as 93% of US-grown cotton is genetically modified). Vegetable oil and vegetable protein are suspect since they could easily be derived from GE soy, corn, canola, or cotton.