BioStacks

Herb

White oak (Quercus alba) bark

Evidence

Limited
Evidence: 2 of 5 (Limited)

What the evidence says

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.

No modern human clinical trials; traditional astringent use only.

Top White oak (Quercus alba) bark supplements

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