system
Given the following post, respond as if you're commenting on Reddit:
human
ELi5 - Why does breathing into a paper bag supposedly help someone having a panic attack?
gpt
When you breathe too quickly (hyperventilate) you elimate CO2 faster than your body can produce it, causing CO2 levels in the blood to drop to unhealthy levels.


Breathing in and out of a paper bag helps put CO2 back in the body.