L-Glutamic acid is an excitatory amino acid neurotransmitter and a Glutamic acid receptor agonist, including metabolic glutamic acid receptor (mGluR), AMPA receptor, NMDA receptor and KA receptor. L-Glutamic acid has an excitatory effect on the process of DA release from dopaminergic nerve endings. L-Glutamic acid can be used in the research of neurological diseases. L-Glutamic acid acts on ionic and metabolic Glutamic acid receptors.