What herbs and supplements can interact with white oak?

Combining white oak with herbs and supplements that may damage the liver (hepatotoxic) should be avoided due to possible additive side effects. Caution is advised.

The primary chemical constituents of oak bark include tannins (phlobatannin, ellagitannins, gallic acid), gallotannins and quercetin. Patients taking quercetin should use caution as there may be additive effects. Tannins found in white oak may theoretically have adverse effects on the kidneys; plants with at least 10% tannins can cause kidney damage. Herbs or supplements with a high tannin percentage may also cause precipitation of constituents of other herbs. Consult with a qualified healthcare professional, including a pharmacist, before combining therapies.

White oak also contains the minerals manganese, calcium, iron, and zinc. Large doses may cause additive effects with multivitamins containing these vitamins and minerals.

You should read product labels, and discuss all therapies with a qualified healthcare provider. Natural Standard information does not constitute medical advice, diagnosis, or treatment.