Stress and the gut-brain axis: Cognitive performance, mood state, and biomarkers of blood-brain barrier and intestinal permeability following severe physical and psychological stress

•Stress induced gut-brain axis dysfunction may contribute to psychological disturbance.•Physiological and psychological status were examined after severe military training.•FFM loss was associated with mood disturbance.•Increased blood-brain barrier permeability was associated with cognitive decline...

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