Skin Conditioning
QUERCUS ALBA BARK
Safety score · 0–100
Fine
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
White oak bark — a potent tannin-rich astringent used for tightening and toning. Effective but drying if overused.
Quercus alba (white oak) bark contains 10-20% tannins (predominantly hydrolyzable ellagitannins), phenolic acids, and triterpenoids. In cosmetics it functions as an astringent and skin conditioning ingredient; EMA has monographs for external use of oak bark with a three-week maximum continuous use recommendation due to drying. EU CosIng lists it without specific restriction. Broken or eczematous skin can react unfavorably to high-tannin extracts.
Skin benefits
- Astringent toning
- Traditional skin firming
- Mild antimicrobial tannins
Known concerns
- Drying with prolonged use
- Not for broken skin per EMA
- Tannin staining
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related skin conditionings
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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve — always read the physical product label and consult a healthcare professional for personal concerns.