Coffee may change gut microbes linked to mood and brain function

Not just the caffeine. A new study reported by ScienceDaily suggests coffee may affect the brain through the gut. Researchers at APC Microbiome Ireland and University College Cork discovered that both caffeinated and decaffeinated coffee were associated with alterations in gut microbes and metabolites linked to mood, stress and cognitive function. Those who resumed coffee drinking after a two-week break reported lower levels of perceived stress, depression and impulsivity. The findings, published in Nature Communications, also showed differences between regular and decaffeinated coffee, with decaf associated with better learning and memory, and caffeinated coffee with less anxiety and better attention. However, the study was small and does not prove that coffee directly improves mental health.Looking beyond caffeineCoffee is often viewed as a quick way to feel more awake, particularly at the start of a demanding day. Its effects, however, may extend well beyond alertness. Coffee contains caffeine, but it also includes polyphenols, phenolic acids and other plant compounds that can interact with the body’s metabolism and the microorganisms living in the digestive system.The study exp...