search
844.934.CARE
  • Show
    Health Library Explorer
    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z A-Z Listings Contact Us
    A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
    Click a letter to see a list of conditions beginning with that letter.
    Click 'Topic Index' to return to the index for the current topic.
    Click 'Library Index' to return to the listing of all topics.

    Phenylalanine 

    Other name(s):

    a-amino-b-phenyl-propionic acid

    Unsubstantiated claims

    There may be benefits that have not yet been proven through research.

    Phenylalanine is an essential amino acid. It is found in high-protein foods. It may improve memory and learning ability. It may enhance mood and alertness. It may help treat some types of depression. It’s been used to help treat schizophrenia and Parkinson disease.

    Phenylalanine is used in some artificial sweeteners. It tends to decrease appetite. It’s been used to treat obesity.

    It’s also claimed to boost pain tolerance in premenstrual syndrome (PMS) and migraine headaches.

    Recommended intake

    The FDA says that the supplement may be harmful.

    Side effects, toxicity, and interactions

    High levels of phenylalanine are linked with the genetic issue phenylketonuria. In infants with this issue, high levels of phenylalanine cause intellectual problems. It can also lead to seizures and delays in development.

    Pregnant women with the condition who don’t avoid phenylalanine during pregnancy may give birth to a baby with signs of phenylketonuria.

    Don't take this supplement if any of these are true:

    • You have phenylketonuria

    • You have melanoma (pigmented type)

    • You have tyrosinemia (type I or II)

    • You take monoamine oxidase inhibitors (MAOIs)

    • You are pregnant or breastfeeding

    Online Medical Reviewer: Diane Horowitz MD
    Online Medical Reviewer: Raymond Kent Turley BSN MSN RN
    Online Medical Reviewer: Rita Sather RN
    Date Last Reviewed: 3/1/2019
    Powered by StayWell
    About StayWell | StayWell Disclaimer