D?aspartic acid ( D?Asp) is mainly a neurotransmitter with many physiological functions. It also par?ticipates in hormone regulation in animals, protects nerves, regulates reproduction, and has certain nutritional potential, and applied to industries such as medicine, food and livestock production. This paper reviews the physiological functions of D?Asp and its application prospects in livestock and poultry production.[ Chinese Jou...