Coconuts grow on large palm trees known scientifically as Cocos nucifera. Despite the name, the coconut is a fruit, not a nut. Coconut water is packed with so many good things, it's hard to know where to start. It has more than 10 times the amount of potassium of most sports drinks. That boost of potassium can help you ward off cramps. It is high in antioxidants, is a major source of arginine (an amino acid that helps your body respond to stress), it has calcium and magnesium, and is low-calorie to boot!