Coconut water has a long history of traditional use for hydration, particularly in tropical regions. However, modern scientific research has also validated its efficacy for supporting mild dehydration. Coconut water contains a natural blend of electrolytes, including potassium, sodium, magnesium, and calcium, which are essential for maintaining fluid balance in the body. Several clinical studies have compared coconut water to conventional oral rehydration solutions (ORS) and sports drinks. For example, a 2012 study published in the Journal of the International Society of Sports Nutrition found that coconut water is as effective as both sports drinks and plain water for rehydration post-exercise, with no significant differences in hydration markers among the groups.

Additionally, coconut water's electrolyte profile makes it particularly suitable for mild to moderate dehydration due to exercise, heat, or gastrointestinal disturbances (such as mild diarrhea). However, it is less effective than standard ORS for severe dehydration, especially in cases like cholera-related diarrhea, due to its lower sodium content compared to medical-grade solutions. Overall, coconut water is a scientifically validated option for supporting hydration and treating mild dehydration, but should not replace medical ORS for severe or acute dehydration cases.