Novelty checks and protocol development
We conducted a novelty check before this review to determine
what existing studies have been conducted on
nutrition policies and to identify research gaps. Two reviewers
(BS and LM) searched for the presence of similar
topics, published protocols, and ongoing and published
reviews in relevant databases. Such databases included
the Cochrane Database of Systematic Reviews (CDSR),
Database of Abstracts of Reviews of Effects (DARE), and
Educational Resources Information Center (ERIC). We
developed a review protocol and registered it at the Center
for Reviews and Dissemination (CRD) database [26].