what is white oak bark
Side Effects. White Oak bark is safe for consumption for a very short period of time (say 3 days) for the treatment of diarrhea. Over dose of the herb may cause the following side effects â stomach problems, kidney failure and liver damage. The herb should not be used for more than 2 weeks at a stretch. White Oak tree bark extracts should not be used in the following â pregnant women, lactating mothers, children and those suffering from eczema, hypertonia, fever, kidney and liver problems. Reviews. In the USA, the white oak tree is considered âgenerally regarded as safeâ or GRAS.