News What coffee does to your gut and mood, beyond the caffeine
Researchers at APC Microbiome Ireland, based at University College Cork, compared 31 regular coffee drinkers with 31 non-drinkers, then tracked what changed when people took up caffeinated or decaffeinated coffee. Both shifted the gut microbiome. Decaf was the type linked to better memory, while caffeine was linked to calmer, sharper focus.
Jul 22, 2026
