Sparkling Coconut water has more than 10 time the amount of potassium of most sports drink. An 8-ounce glass of coconut water is pack with as much potasium as a banana. Most Americans fall short of the daily recommendation for potassium. At 405mg per cup, the potassium in coconut water can help you ward off cramps. Potassium help keep fluid and electrolyte balance in the body, especially during exercise. Because there is more potassium than sodium in coconut water, the potassium may help balance out sodium’s effect on blood pressure and possibly even help lower it.