Riboflavin metabolism GO:0006771 IEV:0001508 KEGG:map00740 The chemical reactions and pathways involving riboflavin (vitamin B2), the precursor for the coenzymes flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD). event riboflavin metabolic process vitamin B2 metabolic process vitamin B2 metabolism vitamin G metabolic process vitamin G metabolism Metabolism of Cofactors and Vitamins