Scientists Made Coffee Drinkers Quit for 2 Weeks — What They Found Surprised Everyone

Scientists made coffee drinkers quit for 2 weeks — what they found surprised everyone

New research suggests caffeinated and decaf coffee may affect gut bacteria, mood, stress, memory and inflammation; experts say the findings highlight the gut-brain connection, but caution that more research is needed

Study: Coffee Consumption Alters Gut Microbiome and Affects Mood, Cognition

Research published in Nature Communications on May 3, 2026, by APC Microbiome Ireland at University College Cork found that both caffeinated and decaffeinated coffee reshape the gut microbiome in ways linked to improved mood and reduced stress, according to the study. The findings, supported by the Institute for Scientific Information on Coffee, indicate that coffee acts through multiple pathways beyond caffeine, including polyphenols and other …

Study reveals coffee’s hidden brain and gut benefits

ASTANA, May 11: New research suggests coffee does more than boost energy, as scientists uncover its role in reshaping the gut and influencing mental well-bA study conducted by APC Microbiome Ireland and published in Nature Communications found that both caffeinated and decaffeinated coffee can positively affect the gut microbiome and, in turn, mood and cognition. Researchers examined 62 participants, comparing regular coffee drinkers with non-dr…

The effect of coffee is not only due to caffeine

Research | The researchers found that coffee changes the gut microbiome. Through that, it can also affect the mind. According to a new study, the effects of coffee are not only due to caffeine. Decaffeinated coffee also improved memory and reduced stress in a study published in the journal Nature Communications. The researchers found that […]

Coffee Impacts Mood, Memory, Stress, & Anxiety — And It’s Not Just Caffeine

A new study finds that both caffeinated and decaf coffee are associated with improved mood, reduced stress, & measurable shifts in gut bacteria & metabolites linked to brain health.