Chemicals and corn by-products are stuffed everywhere in American products. Even in crazy places like maple syrup and ketchup. I went back to the States at Christmas and we went to an upscale grocery store, yet my wife couldn't find almost anything (yogurt, etc.) that wasn't processed and littered with crap to make it "taste better" and save the producers money. I'm sorry but there is nothing in yogurt that needs corn.
The Heinz ketchup here in the Czech Republic tastes identical to the one in the States, but without any serious additives and no corn products at all. People don't eat fast food and they use natural ingredients. You can't sell GM foods here; it's not allowed.
The obesity in the U.S. is staggering, and what's worse, no one cares enough to force the companies producing it to shape up and stop getting their profit from poisoning their fellow man.