GLUCAGON-LIKE PEPTIDE-1 SECRETAGOGUE, GLUCAGON-LIKE PEPTIDE-1 SECRETAGOGUE FOOD OR DRINK, INHIBITOR OF POSTPRANDIAL RISE IN BLOOD GLUCOUSE, AND INHIBITORY FOOD OR DRINK OF POSTPRANDIAL RISE IN BLOOD GLUCOUSE

摘要

The invention relates to an agent for promoting GLP-1 secretion and an agent for inhibiting postprandial increase in blood sugar level, characterized in that they contain .kappa.-casein as an active ingredient, and a food or drink for promoting GLP-1 secretion and a food or drink for inhibiting postprandial increase in blood sugar level, characterized in that they contain a milk- derived casein protein and 60% by mass or more of the milk-derived casein is .kappa.-casein.