system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why when going to sleep can you be starving, but when you wake up the following morning you are no longer hungry?

This happens fairly often to me but I've never understood why.  Very interested to hear responses!
gpt
I believe it has something to do with the hormonal systems being somewhat deactivated while sleeping, due to the brain's prioritization of key biological functions while asleep. Also, your stomach shrinks and expands on a daily basis. While asleep, your stomach shrinks, which is often why it is easier to eat a large dinner than a large breakfast - stomach expansion during the day from meals.