Two recent studies showed that there’s an positive correlation between coffee consumption and longer life. The EPIC study found that people who drank the most coffee had a significantly lower risk of death than non-coffee drinkers. The Multiethnic Cohort study showed the same thing, which held true for all ethnic groups except—strangely—for Native Hawaiians.
Bottom Line: This is an observational study only, so it’s not at all clear if coffee is actually causing longer life or simply a marker of some other factor that’s the true cause, like better general health in coffee drinkers. Luckily, at least, for coffee drinkers, these studies represent strong evidence that coffee consumption isn’t bad for you.