Potential does not equate to proven health problems. May spread traits although that has yet to be determined. No real evidence of animals being harmed either. There is much research to be done but until the federal government steps in with reports and begins studies, there is only anecdotal reports and hearsay to go on. I am a firm believer in the organic method that is proven by many organizations like the Rodale Institute. And again, I buy locally and from only known organic operations. I am not a proponent of GMO as the jury is out on that subject.