Peucedanum Japonicum Leaf/Stem Extract

Peucedanum japonicum leaf/stem extract is a botanical antioxidant/soothing extract typically used at low percentages, but as a multi-constituent plant material it carries a non-trivial risk of irritation or allergic contact dermatitis in highly reactive or eczematous skin. Robust large-scale human patch-test data are limited compared with simpler excipients, so I score it as mild to reflect occasional sensitivity and to prioritize safety for compromised skin and cumulative exposure in routines. Safety Notes: In commercial skincare, Peucedanum Japonicum Leaf/Stem Extract is most often used as a minor botanical antioxidant/soothing component in multi-extract blends, where finished-product use levels commonly fall around 0.001–0.1% (especially in toners, emulsions, and cleansers where botanical extracts are added for claims support). Higher-end consumer-available leave-on serums/essences and ampoules marketed around “Japanese angelica”/coastal herb actives can use single-extract dosing or concentrated solutions that put the finished-product level in the ~1–5% range; above this is uncommon due to odor/color, solubility, and stability constraints typical of plant extracts. No specific EU/FDA concentration cap is established for this INCI beyond general cosmetic safety requirements, so the upper end is driven primarily by formulatability and supplier-recommended limits rather than regulation.