St. John's Wort

    Written by:
    Giulia Guerrini, Nick Milazzo

    Fact-checked

    by:

    Nick Milazzo, Natalka Roshak
    Last Updated: June 20, 2024

    St. John’s wort, also known by its Linnean name of Hypericum perforatum (HP), is an anti-depressant herb that is commonly used for its neurological effects. While it appears effective, it is well known to adversely interact with a variety of pharmaceuticals.

    Overview

    Dosage information

    The most common dosage of St. John's wort extract found in studies is 300mg, taken up to three times a day (for a total of 900 mg).[1]

    Frequently asked questions

    Update History

    Dosage info clarification

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    Research written by

    Nick Milazzo