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    Sulforaphane is a compound that was identified in broccoli sprouts by scientists at the Johns Hopkins University School of Medicine in Baltimore, MD.1

    How It Works

    How to Use It

    The optimal level of intake is not known, but some doctors recommend 200 to 400 mcg of sulforaphane daily from broccoli-sprout extracts.

    Where to Find It

    Sulforaphane is found in highest concentrations in broccoli sprouts, but it is also found in mature broccoli and other cruciferous vegetables, such as cauliflower, cabbage, and kale.

    Possible Deficiencies

    Sulforaphane is not an essential nutrient, and thus no deficiency state exists.


    Interactions with Supplements, Foods, & Other Compounds

    Sulforaphane and dietary consumption of cruciferous vegetables does interact with drug detoxifying enzymes .2 People taking prescription drugs should therefore consult a doctor before taking sulforaphane or broccoli-sprout extracts.

    Interactions with Medicines

    As of the last update, we found no reported interactions between this supplement and medicines. It is possible that unknown interactions exist. If you take medication, always discuss the potential risks and benefits of adding a new supplement with your doctor or pharmacist.
    The Drug-Nutrient Interactions table may not include every possible interaction. Taking medicines with meals, on an empty stomach, or with alcohol may influence their effects. For details, refer to the manufacturers' package information as these are not covered in this table. If you take medications, always discuss the potential risks and benefits of adding a supplement with your doctor or pharmacist.

    Side Effects

    Side Effects

    At the time of writing, there were no well-known side effects caused by this supplement.


    1. Zhang Y, Talalay P, Cho CG, Posner GH. A major inducer of anticarcinogenic protective enzymes from broccoli: isolation and elucidation of structure. Proc Natl Acad Sci 1992;89:2399-403.

    2. Kall MA, Vang O, Clausen J. Effects of dietary broccoli on human drug metabolising activity. Cancer Lett 1997;114:169-70.

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