While coconut water is lighter than the average juice or soda, it still contains calories and is no magic bullet for weight loss. Drinking water or another calorie-free beverage is your best bet for slimming down, as you only lose weight by consuming fewer calories than you burn. Also, if you're dehydrated, drinking or eating anything will temporarily speed your metabolism; however, no food or beverage -- including coconut water -- will increase calorie burning permanently, according to the Academy of Nutrition and Dietetics.
Weigh the Facts
Coconut milk is often sold as a quenching, sports drink, but it doesn't contain enough sodium to rehydrate like other sports beverages. Unless you're exercising vigorously for an hour or longer, plain water will provide enough hydration. While exercise is important for weight loss -- and proper hydration helps sustain exercise -- the point of dieting is to consume fewer calories than you need to maintain your current weight, not more. Coconut water contains 46 calories per cup, so it might do your diet more harm than good.