Why does sodium-heavy liquids like pickle juice, chicken noodle soup, or saline hydrate you better than regular water when you’re dehydrated, but salt water dehydrates you?
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Your blood needs to stay at a very specific level of salt concentration.
If you drink pure water you dilute the salt in your blood so your body has to reduce the amount of water in your blood to get the salt level back up.
If you drink sea water, which has way more salt than your blood, your body is kind of screwed because it doesn’t have a good way to remove just salt from your blood.
If you drink something that is close to the salt concentration of your blood that can just be absorbed without the body having to rebalance.
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