Sea water: If it is salt water it is hypertonic and if you drink enough of it your sodium level will increase. Subsequent side effects depend on the level of hypernatremia, but first increased thirst, muscle cramping, and if only consuming salty sea water dehydration ensues with resulting (temporarily reversible) kidney injury. Then confusion, seizure, brain bleeding and ultimately death.
Answered 6/9/2015
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How much: Sea water has lots of salts, and the kinds of salt and the amount depend on the location. A little won't hurt if heart and kidneys are normal. The more you take in the more the heart has to work to pump blood to the kidneys to get rrd of the salt. Extremely high salt levels in the blood can be deadly.
Answered 9/24/2016
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