fact,
salt was highly valued alongside gold and silver. It makes for a good thinking exercise how salt alone among the prized commodities of the ages defied the law of inflation. … Over time, salt’s production became as widespread as there are vast seas and oceans on earth.

Salt works on your kidneys to make your body hold on to more water. This extra stored water raises your blood pressure and puts strain on your kidneys, arteries, heart and brain.

… Living cells do depend on sodium chloride (salt) to maintain the body’s chemical balances and reactions; however, too much sodium can be deadly. Human kidneys can only make urine that is less salty than salt water.