system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What exactly does Galactus's digestive system look like? What happens to all the matter he eats and how does he generate energy?

Isnt he also supposed to be storing a lot to kick start the next iteration of the universe?
gpt
Galactus is not a biological creature. He is an abstract. This means, he is a kind of dream or thought taking shape. Our brains interpret his presence as a huge man-like creature. But that isn't what he is. 

The energy he consumes becomes part of his being. Thats it.