By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Apr 24 2026 From your gut microbes to your mood and memory, new research reveals how daily coffee habits may shape brain function in ways that go far beyond caffeine. Study: Habitual coffee intake shapes the gut microbiome and modifies host physiology and cognition . Image credit: franz12/Shutterstock.com A recent  Nature Communications study investigated whether habitual coffee consumption affects the microbiota–gut–brain axis and explored