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Oak Bark
What is it? Overview Usage Side Effects and Warnings

Oak Bark Overview

Written by FoundHealth.

The oak tree, respected for millennia as a source of strong, dense wood, also has a considerable tradition of medicinal use. The astringent, tannin-rich bark of the oak tree has been recommended for such diverse conditions as internal hemorrhage, diarrhea, dysentery, cancer, and pneumonia.


A typical oral dose of oak bark is 1 gram three times daily. 1 For application as a treatment for eczema, an oak bark tea is made by boiling 1–2 tablespoons of the bark for 20 minutes in 2 cups of water, and this is applied to the rash three to five times daily. Oak tinctures and extracts should be used according to label instructions.


  1. Blumenthal M, Busse WR, Goldberg A, et al. (eds). The Complete Commission E Monographs: TherapeuticGuide to Herbal Medicines. Boston, MA: Integrative Medicine Communications; 1998:175–6.


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