Skin Conditioning
PETASITES JAPONICUS POWDER
Safety score · 0–100
Moderate
Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.
About
Powder from Japanese butterbur (fuki). The plant genus contains liver-toxic pyrrolizidine alkaloids — cosmetic grade needs verified PA-free processing.
Petasites japonicus (fuki, Japanese butterbur, CAS 91845-41-9 for the ingredient) is a traditional East Asian food and herbal plant. The genus Petasites is well known to contain pyrrolizidine alkaloids (PAs), including senkirkine and petasitenine, which are hepatotoxic and classified by IARC as possibly carcinogenic to humans (Group 2B). EMA and several national regulators require oral Petasites products to be certified PA-free. For cosmetic use, dermal absorption of PAs is less characterized but non-zero, and a whole-plant powder carries a higher PA load than purified extracts. Unless the supplier provides PA-free certification, cosmetic use should be treated with caution.
Function
Skin benefits
- Traditional soothing plant
Known concerns
- Pyrrolizidine alkaloids — hepatotoxic, IARC 2B
- Regulatory restrictions on oral Petasites products
- PA-free certification required for safer use
- Powder form has higher PA load than purified extracts
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.