Eli5 what’s the purpose of sodium or salt in our sweat? I understand sweating is supposed to cool us down but why is there salt in sweat.

Question

Eli5 what’s the purpose of sodium or salt in our sweat? I understand sweating is supposed to cool us down but why is there salt in sweat.

In: Biology

Answer 1

Pure water without any salts dissolved in it doesn’t really exist anywhere in your body, so it would be nearly impossible to eject water without salt. Like other comments have said, it’s not so easy to push water away from sodium ions.