Disclosed is a flavor-enriching agent comprising a substance discovered by searching for a number of variation compounds having a CaSR-agonizing activity. Said substance exhibits a potent flavor-enriching action, particularly with respect to middle tastes, and exhibits an improved stability. Also disclosed is a composite flavor-enriching agent comprising said substance and another substance having a CaSR-agonizing activity. Specifically disclosed are a flavor-enriching agent comprising ?-Glu-Nva-Gly (L-?-glutamyl-L-norvaline-glycine), and a composite flavor-enriching agent comprising said substance together with another substance having a CaSR-agonizing activity.本發明於探索許多具有CaSR促效劑活性的變異化合物後,發現具有更優異的可賦予濃厚味作用,特別係具有中後味型的高力價之可賦予濃厚味作用,且具優異安定性,可賦予濃厚味之物質,本發明係提供由該物質構成之可賦予濃厚味用劑,以及由該物質與其他具有CaSR促效劑活性的物質構成之複合可賦予濃厚味用劑。本發明係一種由γ-Glu-Nva-Gly(L-γ-麩氨醯基-L-正纈氨醯基-甘氨酸)構成之可賦予濃厚味用劑,以及併用該物質與其他具有CaSR促效劑活性的物質所構成之複合可賦予濃厚味用劑。
