This is why sports drinks tout their.

How Potassium Functions in the Body Potassium is an electrolyte, or a substance that conducts electricity. They Aren't Lacking This One Vital Nutrient. They say, "An apple a day keeps the doctor away." While apples have many health benefits, I sometimes think the saying should be changed to, "A banana a day keeps the doctor away." As most of you already know, bananas are an excellent source of potassium, a mineral that is essential for proper nerve and muscle function.

It is your kidneys' job to keep the electrolyte concentration in your blood in balance by filtering any excess electrolytes out of the body through urination. Monkeys May Be Smarter Than You Think. Your body needs a proper balance of electrolytes so cells can send messages controlling nerve impulses, heart function, fluid balance and muscle coordination.

It is possible to get sufficient potassium from a healthy diet, but for various reasons, many people do not consume enough of this important nutrient.

Your kidneys work to keep the balance when you lose electrolytes through other means, such as sweating.