The present invention provides a novel method for improving the flavor of a food, drink, pharmaceutical product, oral care product, or the like. One aspect of the present invention is a method for improving the flavor of a food, drink, pharmaceutical product or oral care product, the method including the step of adding 0.1 to 10000 ppb of ³-aminobutyric acid and 0.01 to 10000 ppb of naringenin to the food, drink, pharmaceutical product, or oral care product.