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.
Red blood cells are usually doughnut-shaped. In a person with sickle cell anemia, the red blood cells are shaped like a C—like a sickle. Find out more about this disease by taking the following quiz.
Dehydration may bring on a sickle cell crisis. Other preventive tips: