"Enjoy! You thought coffee was bad for you? Actually, it seems to protect against all sorts of ills, from diabetes to liver cancer"
Nutrition experts like Willett point out that, like tea, coffee is rich in antioxidants--substances in vegetables and fruits that deactivate disease-causing byproducts of the body's metabolism. "Coffee is by far the largest source of antioxidants in our diet," says Joe Vinson, a chemistry professor at the University of Scranton in Pennsylvania. That's not just because we drink so much. In tests conducted at Vinson's lab, coffee topped the list of foods that are densest in antioxidants, surpassing blueberries, broccoli, and most other produce. Only chocolate, dried fruits, and dried beans ranked higher.
Source:
http://www.usnews.com/usnews/health/articles/051219/19coffee.htm