Have another cup of coffee? Caffeinated Women May Be Fighting Depression With Every Cup
Ascherio says he's not quite sure how caffeine makes people feel better. "Our results suggest that caffeine may have a beneficial effect on the cellular level, and may protect neurons lost to neurodegenerative disease," he tells Time's blog, Healthland. "We are establishing a certain degree of reasonable evidence that caffeine has a long-term effect on the risk of depression, but we cannot attribute this to any pathology."