Important electrolytes for humans include sodium (Na) and potassium (K), which are lost through sweat during exercise.

  Sports drinks claim to
  replenish these electrolytes.

• Most Americans overconsume sodium already.

• A banana offers more than 400 mg. of potassium.

So why do we need these sports drinks, even after exercise?

You do need to rehydrate, but these drinks are mostly salt water.