Coconut water, the liquid endosperm of green coconuts (Cocos nucifera), is a refreshing natural beverage, an oral rehydrating agent, and a supplement in nutrient media for tissue culture. Coconut water is often described as a “natural isotonic sports drink”, providing higher amounts of electrolytes such as potassium and magnesium than conventional sports drinks. Coconut water solids also have a prebiotic role, and beneficially influence the balance of microflora in the gastrointestinal tract.