In addition, Palmaria palmata protein hydrolysates containing the bioactive peptide (ILAP) and a Porphyra dioica protein hydrolysates containing the bioactive peptide (WLVA) were found to inhibit dipeptidyl peptidase IV (DPP IV), one of the key regulatory enzymes involved in the secretion of insulin in diabetes mellitus [10]. This evidence concerns the gene DPP4 and diabetes mellitus.