5 Fast Water Facts

More than half of your body is made of water. No wonder you can't live without it. Most newborn babies are actually about 78% water. The percentage drops as you get older.

Drink eight cups a day is a rule you've probably heard since you were in diapers. But the amount you need depends on your age, gender, the weather, and more.

In general, most healthy adults need four to six cups, while kids should aim for at least six to eight. Some active teens may need up to 11.

Not sure you're getting enough? Your pee may hold the answer. If it looks light, you're all right. If it's dark, to the water cooler you must dart.

Bad rhymes aside, experts say when you feel thirsty, you're already dehydrated. Happy hydrating.