As a subject matter expert in comic book lore and the fictional universe of Superman, I can provide an informed answer to your question.

Superman, whose real name is Kal-El, is a character from the DC Comics universe. He was born on the planet Krypton and has superhuman abilities due to Earth's yellow sun. In his human guise as Clark Kent, he is often depicted as consuming food, which is more of a social activity and a way to blend in with humans rather than a necessity for his survival. However, when he is in his Kryptonian form, he does not require sustenance in the same way humans do. His Kryptonian physiology allows him to derive energy directly from a yellow sun, which is why he is often shown not eating when he is using his powers.

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Since eating is both about repairing tissue and providing energy to the body, both things handled by his solar energy process, it is conceivable, Post Crisis Superman had no reason to have to eat other than enjoying the food and the company.read more >>