Whether calculating your target heart rate, assessing your risk for a common condition, or testing your knowledge of today's health concerns, these tools help you manage your health. They are easy to use, informative, and often surprising.
When you're thirsty for a drink of water, you likely turn on the tap or grab a bottled water. You may take for granted that the water you drink is safe and pure. But the quality and safety of water can vary from place to place. It depends on where the water comes from and how it was treated. Find out more about drinking water by taking this quiz.