system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: Why does anxiety take appetite away and causes stomach to hurt ?
gpt
As you become stressed your body prepares to defend itself from physical attack. This means it turns off all the things that aren't designed to fight or run away. That includes your stomach and digestion. No point wasting energy digesting food if you are going to get attacked by a tiger in the next 5 minutes.