Coffee may boost gut health and mood, new research reveals
A fresh study from University College Cork suggests that coffee could do more than just wake people up. The research highlights potential benefits for gut bacteria and mental health. Previous studies had already linked coffee to heart health and a longer lifespan, but this latest work explores its broader effects. The team compared 31 regular coffee drinkers with 31 non-drinkers. They found that those who drank coffee had higher levels of certain gut bacteria, including Eggertella sp. and Cryptobacterium curtum. These shifts in gut microbes may play a role in the drink’s health benefits.
A separate 2025 study by Bielefeld University and the University of Warwick showed that even a single cup of coffee could lift mood. Participants who resumed drinking coffee—whether caffeinated or decaf—reported fewer depressive symptoms. Interestingly, only the decaf group saw improvements in learning and memory, hinting that plant compounds, not caffeine, might be key.
Scientists believe the gut-brain axis, a two-way communication system between the gut and brain, could explain some of these effects. Earlier research also suggested that black coffee, without sugar or milk, was linked to a lower risk of early death. The findings add to growing evidence that coffee may support both mental and gut health. While caffeine has long been studied, other compounds in coffee could also contribute to its benefits. Researchers plan further studies to explore these connections in more detail.
