Can Coffee Help Prevent Cancer?

For millions of people, coffee's main "health benefit" is that it helps their brains function each morning. However, two new studies, reported in The Journal of the National Cancer Institute, show a link between coffee and the prevention of two common types of cancer. In the first study, researchers in Japan found that regular coffee drinkers had about half the incidence of liver cancer as people who never drank coffee. And an unrelated study, conducted by the Harvard School of Public Health, showed that drinking decaf -- but not caffeinated -- coffee had a similar correlation to colorectal cancer risk.