system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: When I'm hungover why do I always crave greasy foods like pizza rather than foods that are better for me?
gpt
Your body is depleted of various electrolytes and calories since alcohol zaps your blood sugar levels, and dehydrates you, fatty salty food is an efficient albeit unhealthy way to replenish those stores.