Disclosed are an agent for promoting proliferation of lactic acid bacteria, a preservative, and others, all of which do not deteriorate the flavor of food products. Specifically disclosed is a powdery malted rice extract composition obtained by inoculating lactic acid bacteria in a liquid prepared from a water extract of malted rice so that its Brix degree is 0.01 to 10, culturing the bacteria in the liquid, followed by drying the resulting culture.本發明提供一種不妨礙食品之風味之乳酸菌增殖促進劑、防腐劑等。本發明係關於一種米麴粉末萃取組合物，其係於以使米麴之水萃取物之布裏度成為0.01~10度之方式所製備之液中植入乳酸菌並加以培養後，乾燥而獲得者。
