Ulmus Fulva Bark Extract

Ulmus Fulva (slippery elm) bark extract is primarily a mucilage-rich soothing/film-forming botanical used at low percentages to support barrier comfort, and it is generally well-tolerated in leave-on products. However, as a plant extract containing multiple proteins/polyphenols, it carries a small but real risk of irritant or allergic contact dermatitis in highly reactive or eczema-prone patients, especially when layered with other actives. Given this sensitization potential despite its "soothing" reputation, a gentle-but-not-inert score is most clinically appropriate. Safety Notes: In commercial skincare, Ulmus fulva (slippery elm) bark extract is most often used as a low-level soothing/film-forming botanical at trace-to-sub-0.1% levels in multi-botanical lotions, toners, and cleansers, with the lowest observed use around 0.001% (label-listed near the end in complex blends). Higher-strength consumer products marketed for barrier support or irritation relief (balms, serums, masks) can use dedicated slippery-elm extracts at ~1–5%, with ~5% representing the upper end typically seen before viscosity, tack/film feel, odor/color, and botanical-solids stability become limiting; rinse-off products tend to sit toward the low end while leave-on occlusive/soothing formats can reach the high end.