Coconut water is nature's rehydration drink of choice. Coconut water is high in electrolytes, particularly potassium. Many folks feel nauseated when they use typical sports drinks to rehydrate because they're high in sugar. That's why we use coconut water, which studies show may be associated with less stomach upset when used for exercise rehydration as compared to sugar-filled beverages. One study also found that coconut water may be easier to absorb than those sugary drinks.