This review aimed to describe the interleukins and interleukin gene polymorphisms related recommended as a RAS biomarker. Articles were searched through PubMed, ScienceDirect, Cochrane Library databases, using keywords of “Interleukin” AND “Recurrent Aphthous Stomatitis”. The Risk Bias Assessment tool for Non-randomized Studies (RoBANS) was used, writing this refers Preferred Reporting Items Sy...