Please note that this section reports on claims that have NOT yet been substantiated through scientific studies.
Phenylalanine may help improve memory and learning ability, enhance mood and alertness, and help treat some types of depression.
It has been used to help treat schizophrenia and Parkinson's disease.
Phenylalanine tends to decrease appetite and has been used in treating obesity.
It is claimed to improve pain tolerance associated with pre-menstrual syndrome and migraine headaches.
Phenylalanine has been withdrawn from the U.S. marketplace. The FDA has determined that supplemental phenylalanine may be harmful.
Elevated serum levels of phenylalanine are associated with the genetic condition phenylketonuria. In infants with phenylketonuria, high levels of phenylalanine cause mental retardation and wide systemic damage.
Pregnant women with phenylketonuria who do not remain on a phenylalanine-free diet during pregnancy may deliver an infant with all the signs of phenylketonuria.
Women who are pregnant or breast-feeding should not use phenylalanine supplements.
People who have phenylketonuria, melanoma (pigmented type) or tyrosinemia (type I and II) should not take phenylalanine.
Phenylalanine should not be taken in conjunction with antidepressants belonging to the class of monoamine oxidase (MAO) inhibitors.
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