As a librarian, I see a lot of literature and I can assure you, just because something is "peer-reviewed" or a "systematic review" does not ensure high quality. In fact, I see a lot of systematic reviews that are published, but poorly done.
Here are my red flags:
- No librarian or informationist or methodologist is a co-author or attributed in some way in the study.
- The full search strategy is not listed in the methodology or in an appendix. Just listing the keywords searched is not sufficient as it's not transparent or reproducible.
- Authors do not mention or cite PRISMA, PRESS, Cochrane, Joanna Briggs, or any other protocol/best practice documentation.
- Less than three authors performed the "systematic review".
- The journal does not have an experienced person peer-reviewing this type of methodology. See "Guidance for systematic reviews in journal author instructions: Findings and recommendations for editorial teams https://doi-org/10.1002/cesm.12050