White oak bark has been an important herb used by Native American cultures for hundreds of years as a medicine to treat wounds and intestinal problems. White oak bark is one of the strongest natural astringent herbs available. It provides not only great astringent properties, but anti-inflammatory and antiseptic properties as well.
Rich in tannins, white oak bark also provides vitamin B12 and minerals like calcium, iron and zinc. White oak bark's astringent properties tighten tissues and strengthen blood vessels, making it ideal for treating diarrhea, hemorrhoids and varicose veins. The blood-clotting agents active in white oak bark are also helpful to cease nosebleeds.
White oak bark has also been used to treat inflammation and irritations caused by poor digestion, ulcers, strep throat and skin problems.