DL-Phenylalanine is a racemic mixture of phenylalanine, an aromatic amino acid with antidepressant, analgesic and appetite suppressant properties. The antidepressant effect of DL-phenylalanine may be accounted for by its precursor role in the synthesis of the neurotransmitters norepinephrine and dopamine.

D-phenylalanine has been used with mixed results to treat chronic pain, including pain caused by rheumatoid arthritis. More. D-phenylalanine has been used with mixed results to treat chronic pain , including pain caused by RA.

1,500–2,500 mg per day of DLPA.

l-DOPA, dopaminergic agonists and Monoamine Oxidase Type-B (MAO-B) inhibitors represent the pharmacological options more commonly utilized for treating the symptoms of Parkinson's disease (PD). These drugs are able to improve motor disturbances related to loss of nigral dopaminergic neurons.

DL PHENYLALANINE FOR BIOCHEMISTRY