Colorant
JUGLANS NIGRA BARK EXTRACT
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Black walnut bark (Juglans nigra) extract — a tannin and juglone-rich bark extract used as natural dye and astringent. Juglone is a documented sensitiser, so contact-dermatitis risk is real.
Function
Skin benefits
- Tannin astringent
- Juglone antimicrobial
- Traditional dye and skin care use
Known concerns
- Juglone is allelopathic and sensitising
- Black walnut linked to contact dermatitis
- Bark dust irritates skin and lungs
- Sparse modern cosmetic safety review
References
EU CosIng database
European Commission cosmetic ingredient registry — regulatory status, restrictions, authorised functions.
Related colorants
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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.