GRZYBOWSKA, Dominika, LEŚNIAK, Maria, BEDNARZ, Hubert, GACZOŁ, Agnieszka Anna, GRZYB-KURNIK, Weronika, IDZIK, Kamil, KAWA, Michał, KILIAN, Tomasz, KOPCIŃSKA, Paulina, KURNIK, Michał, MORTKA, Magdalena, PIOTROWSKA, Gabriela and URBAŚ, Aleksander. The role of the gut–brain axis in the pathogenesis of depression and anxiety disorders: The significance of microbiota, bacterial metabolites, and vagus nerve signalling — A systematic review. Quality in Sport. Online. 5 August 2026. Vol. 65, p. 73951. [Accessed 9 August 2026]. DOI 10.12775/QS.2026.65.73951.