Coconut water is the clear liquid found inside immature coconuts (Cocos nucifera). As the coconut matures, the water is replaced by coconut meat. Coconut water is rich in carbohydrates and electrolytes such as potassium, sodium, and magnesium. Coconut water is a popular beverage for treating dehydration, especially after exercise or with a stomach bug. It's also sometimes used as a sports drink alternative to sugary drinks