<;P>;PROBLEM TO BE SOLVED: To provide a new antihyperglycemic agent or a new food for improving-preventing hyperglycemia by using a new GPR119 agonist. <;P>;SOLUTION: The GPR119 agonist contains a culture product of Penicillium sp. NBRC 105016 strain or an extract of the culture product. The GPR119 agonist is used as an ingredient for medicines or foods. <;P>;COPYRIGHT: (C)2010,JPO&INPIT