system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Does Superman need blood to live? He doesn't seem to need air. Could someone capable of teleportation remove his blood from his body or teleport something in to block the flow? What would happen?

Also: does his heart have super muscles also? Does he have super blood pressure?
gpt
I think the established canon is that all Superman needs to survive is literally solar energy. He doesn't need oxygen, food, etc. Literally just sunlight. He chooses to eat and breath because he was raised as a human and identifies as a human.