ABSTRACT
Japanese, on average, live longer according to the demographic data of Ministry of Internal Affairs and Communications, as shown in the population pyramid changes over 100 years. For example, aged adults frequently visit clinics or hospitals even for slight illness or as regular health examinations because their medical costs are in part reimbursed by the government. The reimbursement system worked well supporting the aged adults, which potentially prevented them from degenerative diseases. Royal jelly (RJ) is a secretion material of the cephalic glands of nurse bees. Its role has attracted academia, because it possesses unique and important biological features and health benefits. RJ is enriched with minerals, vitamins, and many other nutritional as well as functional components. Although many functional ingredients are yet to be isolated and identified for their functions, such ingredients for health benefits were previously reported and used as drug and functional food ingredient.
