A glass of coconut water is packed with as much potassium as a banana. At 405 mg per cup, the potassium in coconut water can help you ward off cramps. You need potassium, because it helps keep fluid and electrolyte balance in the body, especially during exercise. Since coconut water contains a large amount of potassium, it can help you balance out sodium's effect on blood pressure and possibly even help lower it.
Amino acids are essential for repairing tissues and are the building blocks of protein. And in fact, coconut water contains more alanine, arginine, cysteine, and serine than cow's milk. It's a major source of arginine, an amino acid that helps your body respond to stress. Arginine also helps keep the heart healthy.