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UNFORTUNATE_POO_TANK t1_j6cc3hi wrote

Reply to comment by RixirF in ELI5: why do our bodies randomly act like we haven’t had water in days and that we need to chug a bunch randomly? by Serratedlily

What's too late? Your body has a very robust system to let you know if you need more water. You can go days without. Strongly not advised, but being thirsty doesn't mean too far gone in any way.

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RockinMadRiot t1_j6d1hz8 wrote

Think of it this way, the brain is 80% water. So just as much as 2% dehydration can really effect its performance and cause issues.

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Aristox t1_j6codeg wrote

Just because you don't die doesn't mean your physical and mental performance aren't reduced. You absolutely cannot go days without being dehydrated

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