Jętasiewicz, I. et al. 2026. THE ROLE OF THE MICROBIOTA-GUT-BRAIN AXIS IN THE PATHOGENESIS AND TREATMENT OF MULTIPLE SCLEROSIS – A REVIEW OF THE LITERATURE. International Journal of Innovative Technologies in Social Science. 4, 1(49) (Mar. 2026). DOI:https://doi.org/10.31435/ijitss.1(49).2026.5159.