Since GM soy has only been around and abundant for less than a decade, no one yet knows for sure what the long term health effects, if any, will be on the populations of countries such as the U.S. that swear by it. Natural foods stores like WholeFoods are your best bet for finding non-GM foods of all sorts.
CONTACTS: Environmental Health News, www.environmentalhealthnews.org; Non GMO Project, www.nongmoproject.org.