The issue of GM food products is more complicated than Dennis suggests. We know that golden rice has more vitamin A because we're measuring for it. We don't know the long term impact.
It's simplistic to say Americans are obese because of a lack of exercise. Maybe it has something to do with corporate farming methods using hormones that get into the food supply. We know this is a contributory factor in antibiotic effectiveness but somehow it's ridiculous to assume the same thing for animal growth hormones.