Genetically modified foods must be avoided. There are currently eight GM food crops in the market. These include corn, soy, cottonseed (used in vegetable cooking oils), canola (canola oil), sugar from sugar beets, Hawaiian papaya, some varieties of zucchini and cookneck squash. http://articles.mercola.com/sites/articles/archive/2011/08/05/how-did-weedkiller-wind-up-in-most-us-rain-samples.aspx