How much can a little Potassium lost during exercise really matter, right? Did you know that muscle contraction, even the beating of your heart depends on potassium!? We all know that bananas and potatoes are great sources of potassium, but what if you don't like bananas or you don't want to eat a baked potato before and after every workout? Just take Potassium Plus Kelp by Vitalabs and you won't have to worry about it.