Why does salt water dehydrate you, but saline/sodium chloride/electrolytes hydrate you?

Question

Why does salt water dehydrate you, but saline/sodium chloride/electrolytes hydrate you?

In: Chemistry

Answer 1

It’s the concentration of salt that’s key.

Saline is .9% salt while ocean water is 3.5-3.8%

Your body needs a small amount of salt to function, but Ocean water has so much salt dissolved in it that it overloads your body, so your kidney’s have to filter it all out which in turns uses up more water than you put in.