Because Food, Inc. freaked me out. And since then, I've gone a lot more organic. With milk. Meat. Cereal. Chips. Condiments.
I really try to stay away from buying stuff with high-fructose corn syrup in it and other crazy amounts of preservatives. Because I'm becoming more and more confident that my body simply didn't know what to do with those things. Evolutionally speaking, high fructose corn syrup is like plastic to our body. It's completely unrecognizable. And how can your body adapt when it doesn't know what's going on inside of you.
Help a body out.