A friend's son is a chemist, and for kicks he and his lab coworkers analyzed french fries from a few fast food joints. Turns out McDonald's uses chemical none of the others do to give it a unique small and taste.
But what's the point of this documentary? That McDonald's food eaten every day will wreck you? Wow, I really had no idea, *******, thanks. I don't think the masses who consume McDonald's frequently are exactly the type who attend the Sundance Film Festival, so great work getting your pat on the back from your intellectually-elite peers, bub.