Epilobium Fleischeri Extract

Epilobium fleischeri (alpine willowherb) extract is typically used at low concentrations (~0.1–2%) as a soothing/anti-redness, sebum-modulating botanical rich in polyphenols, and it is generally well-tolerated in cosmetic patch-test experience. However, as a plant extract it contains multiple bioactive constituents that can unpredictably sting or trigger irritant/allergic reactions in highly reactive or eczema-prone patients, especially on compromised skin or when combined with other actives. I score it as gentle rather than very gentle to reflect this non-zero sensitization/irritancy risk inherent to complex botanicals. Safety Notes: In commercial skincare, Epilobium fleischeri (often marketed as Alpine willowherb) is commonly used as a sebum-balancing/soothing botanical, with low-end use levels around 0.05–0.2% in multi-botanical leave-on serums and moisturizers where it functions as a minor supportive extract. More focused anti-blemish and pore-care leave-on products typically use ~0.5–2%, and high-strength consumer OTC formulations built around this extract are observed up to ~3% (usually tied to supplier-recommended active-dose ranges and standardized extract actives). Rinse-off products tend to sit toward the lower half of the range due to short contact time, while the upper end is predominantly leave-on.