Across the quiet frontier between gut and mind, a growing body of science is asking whether the microorganisms we carry within us might hold keys to easing anxiety, depression, and even schizophrenia. A narrative review published in the Journal of Restorative Medicine finds that specific probiotic strains — particularly Lactobacillus and Bifidobacterium species — show measurable effects on stress hormones, inflammation, and mood through the gut-brain axis. The evidence is promising enough to take seriously, yet too fragmented and inconsistently gathered to guide clinical practice. The field st