<;P>;PROBLEM TO BE SOLVED: To obtain a new antiaging component that can retard the ageing of cells and tissues, internal organs, and individuals constituted with the cells without gene manipulation and in no need of active oxygen deletion by feeding an antioxidant substance and a SOD-like active substance. <;P>;SOLUTION: This oral antiaging agent contains ground rice grain as an active ingredient. Further, the oral antiaging agent is obtained by using rice grain as a starting material and conducting a prescribed treatment, for example, extraction, enzymatic hydrolysis. <;P>;COPYRIGHT: (C)2005,JPO&NCIPI