Popcorn is a timeless classic: a true gem within the snack food kingdom. It is fun to munch on and fun to make, especially the popcorn machines where each popped kernel gets spun around and shot into the bowl. Many people eat their popcorn covered with butter, salt, or sugar, which is not exactly healthy. But popcorn in its pure form, as an unprocessed grain, can be one of the healthiest snacks one can have. A new study has found that it contains more beneficial antioxidant substances than fruits and vegetables.