Your daily coffee habit may affect your brain and mood in unexpected ways, study finds

Your daily cup of coffee may be doing more than helping you wake up in the morning, a new study has found.

A small study out of University College Cork in Ireland found that both caffeinated and decaffeinated coffee were linked to changes in gut microbes and some measures of mood. Both types also appeared to have different effects on cognition.

"Coffee is more than just caffeine — it’s a complex dietary factor that interacts with our gut microbes, our metabolism and even our emotional...