About White oak (Quercus alba) bark
White oak bark is a tannin-rich astringent botanical used traditionally for topical skin/gum irritation and as an internal astringent for diarrhea. No modern human RCTs support efficacy for oral or topical use at any specific dose.
What White oak (Quercus alba) bark supports
- Traditionally used as an astringent for skin/digestive complaints — no RCT confirmation
Clinical evidence
Limited clinical evidence. No modern human clinical trials; traditional astringent use only.
Reference