Chances are, you've eaten a GMO food today. They're found in 80% of packaged foods in the US and in crops such as corn, soy, zucchini, and yellow summer squash.

A small percentage of squash are also GMO, developed for disease resistance. Each of these traits helps reduce the amount of inputs needed to produce a crop, especially in terms of pesticide ...

While GMO corn is often fed to livestock, it also goes into many processed foods like cereal. Ralph Kerpa/McPhoto/ullstein bild via Getty Images About 92% of corn in the US is genetically modified ...