How Do You Know if You’re Eating GM Foods?

According to the latest US Department of Agriculture (USDA) statistics, about 88 percent of all corn, 90 percent of all canola, and 94 percent all soy grown in the United States is genetically modified in one way or another (not all are the Roundup Ready variety), which means that virtually every processed food you encounter at your local supermarket that does not bear the “USDA Organic” label will contain one or more GM components.
Therefore, if you want to avoid GM foods (which have a variety of inherent health dangers over and above the hazards of Roundup residues), you’ll want to, first and foremost, avoid most processed foods, unless it’s labeled USDA 100% Organic. You can also avoid GM foods that are not found in processed foods, if you know what to look for. There are currently eight genetically modified food crops on the market:

Much more here: http://articles.mercola.com/sites/articles/archive/2011/08/05/how-did-weedkiller-wind-up-in-most-us-rain-samples.aspx?e_cid=20110805_DNL_art_1