This is the liquid found inside young coconuts. It is packed with electrolytes, excellent for after exercise. Coconut water contains potassium, calcium and magnesium and is also a natural hydrator. I use it in my smoothies and have added it to a few of my recipes. You can find it in health food stores and supermarkets. Ensure you read the label carefully as some contain preservatives and/or sugar and may not be 100% coconut water.