I have wondered about this for a while. It didn't really make sense to me why the crust of the bread is considered healthier than the inside. After all, it's just bread that has been cooked a little more.
Turns out that crust is healthier for you. Researchers have found that an anti-oxidant (pronyl-lysine) is eight times more prevalent in the crust than in the soft, middle part of a loaf of bread. Also, the crust contains more dietary fiber, which helps prevent colon cancer.
And there you go.