system
Given the following post, respond as if you're commenting on Reddit:
human
eli5 how does salt support hydration in the body?

I’ve always thought that salt actually dehydrates us (which is why we can’t drink salt water), but apparently it supports hydration… can someone please explain?
gpt
In the gut there are water transporting channels.  For them to work, you need energy, sodium and chloride ions (salt), and glucose.  The World Health Organization uses a solution of water, salt, and sugar for cases of severe dehydration from things like cholera.  It's like Gatorade but a lot less sweet.