Bartłomiej Zarębski, Maja Ćwiek, Klaudia Malec, Amin Omidi, Bartosz Krawiec, Jakub Sójka, Maksymilian Szombara, Michał Mokrzyński, Piotr Szyszka and Olaf Jadanowski 2025. THE ROLE OF COLLAGEN SUPPLEMENTATION IN KNEE JOINT DISORDERS: A SYSTEMATIC REVIEW OF CLINICAL STUDIES. International Journal of Innovative Technologies in Social Science. 5, 3(47) (Sep. 2025). DOI:https://doi.org/10.31435/ijitss.3(47).2025.3827.