10 Weirdly Specific Powers You Didn't Know Superman Has
6. Super-Eating
So, the Man of Steel is shredded. His nickname probably should be the Man of Abs. You don't get that way by eating non stop, yet Superman actually has a super-eating power.
The crazy part is that he doesn't technically even need to eat food like a human to survive. If he does eat, it's just to keep up appearances when he's Clark Kent. It kind of makes you wonder how his system handles food it doesn't actually need. He must have a super-digestive tract that allows him to process it all.
The big question is why would this ability ever come up and how could could it possibly ever be of any real use. It came up in Action Comics #454, Superman is wiped out when the Earth's core drains the power of the sun and limits his own powers. His answer, then, is to eat as many hamburgers as he can, which he can, obviously, because he has super-eating powers.