Bartosz Wiśniewski et al. 2026. GUT MICROBIOTA AND DEPRESSION: MECHANISMS, EVIDENCE, AND IMPLICATIONS FOR TREATMENT AND SPORT: A CURRENT REVIEW. International Journal of Innovative Technologies in Social Science. 2, 2(50) (Jun. 2026). DOI:https://doi.org/10.31435/ijitss.2(50).2026.5674.