I’ve come to understand that the reason humans shouldn’t drink seawater is that it requires more water to get rid of that salt through urine. But if salt is a necessary nutrient, why would the body need to get rid of it at all? If your body were low on salt, what it be good for you to drink seawater?
Edit: added follow-up hypothetical question
In: Biology
Salt regulates our blood pressure and water in our cells along with potassium. Too much salt pulls water out of our cells and can increases blood pressure to dangerous levels. Without fresh water to dilute this, our kidneys can’t function and cells shrivel up and you die.
To much water will dilute sodium and cause trouble as well because it is needed in certain amounts for our nervous system and cells to function properly.
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