TABLE 1.

Search terms used for PubMed‐MEDLINE, Cochrane‐CENTRAL and EMBASE. The search strategy was customized according to the database being searched.

The following strategy was used in the search: {<subject> AND <intervention>} {<subject> {<Subject: (<periodontal disease> OR <periodontitis>) OR (periodontal disease [MeSH] OR (<periodontal therapy>) OR (periodontitis [MeSH] [textword]}> AND <intervention> (<omega‐3 fatty acids OR EPA OR DHA OR fish oil>)}

Note: The asterisk (*) was used as a truncation symbol.

Abbreviations: DHA, docosahexaenoic acid; EPA, eicosapentaenoic acid.