Eli5: Why does sea water kill us but electrolyte solutions actually hydrate us? Aren’t they both water + salts?

Question

Edit: Question answered. Thanks!

Don’t be too hard on me, I almost failed chemistry:'(

In: 2220

Answer 1

Concentration is different.

A sports drink has *about* 500mg of salt per liter.. sea water has 3 *grams* per liter.
Corrected: 35 *grams*, didn’t move the decimal over enough. The point still stands.