Phenylalanine is an essential aromatic amino acid that is a precursor of melanin, dopamine, noradrenalin (norepinephrine), and thyroxine.
L-phenylalanine may be helpful in some with depression. It may also be useful in the treatment of vitiligo. There is some evidence that L-phenylalanine may exacerbate tardive dyskinesia in some schizophrenic patients and in some who have used neuroleptic drugs.
University of Chicago Cancer Research Center, Chicago, Illinois, United States
University of Nebraska Medical Center, Omaha, Nebraska, United States
Vanderbilt U Medical Center, Nashville, Tennessee, United States
GSK Investigational Site, Verona, Veneto, Italy
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