Background: Since its creation, the Mental Health Literacy Scale (MHLS) has been used worldwide in mental health literacy studies.
Objective: This study aimed to systematically evaluate, summarize, and compare the measurement properties of MHLS validation studies.
Methods: PsycINFO, CINAHL, ERIC, Scopus, Embase, MEDLINE, and PubMed databases were searched from May 30, 2015, to December 31, 2023.