Coconut water was evaluated as a home glucose electrolyte solution for well-nourished children with mild diarrhoea. We describe the chemical composition of coconut water by type and age of coconut (Cocos nucifera). Our results suggest that young coconut water can be used, together with early refeeding, as a home glucose electrolyte oral rehydration solution in the early stages of mild diarrhoeal disease, despite not having a balanced electrolyte composition. However, it should not be used in patients with severe cholera, or in patients who are dehydrated and/or in whom renal function is impaired.