DL-β-Phenylalanine is widely used in the pharmaceutical industry as a precursor for the synthesis of various drugs, particularly those targeting neurological and psychological conditions. It serves as a building block for the production of L-DOPA, a critical medication for managing Parkinson's disease. Additionally, it is utilized in the development of antidepressants and other psychoactive compounds due to its role in neurotransmitter regulation. In research, DL-β-Phenylalanine is employed to study enzyme activity and metabolic pathways related to amino acid metabolism. It also finds applications in the production of dietary supplements aimed at improving mood and cognitive function.