system
Given the following post, respond as if you're commenting on Reddit:
human
How do hibernating animals survive without drinking?

I know that they eat a lot to gain enough fat to burn throughout the winter, and that their inactivity means a slower metabolic rate. But does the weight gaining process allow them to store water as well?
gpt
The metabolic breakdown of fat produces not only energy, but a lot of water. When you put that together with the slow metabolism, body temperature and breathing, they end up needing less water than normal and they are able to survive.