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 has been purported 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 Phenylalanine has been withdrawn from the U.S.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. Side effects, toxicity, and
interactions Elevated serum levels of phenylalanine are
associated with the genetic condition phenylketonuria. In
infants with phenylketonuria, high levels of phenylalanine cause
intellectual disability and can also lead to seizures and delays
in general development. Pregnant women with phenylketonuria who
do not remain on a phenylalanine-free diet during preg