Brassica Oleracea Capitata Leaf Extract

Brassica Oleracea Capitata (cabbage) leaf extract is primarily used as a soothing/antioxidant botanical at low concentrations, and it is generally well-tolerated in leave-on products. However, Brassica extracts can contain sulfur-containing compounds and other plant constituents that can trigger stinging or irritant reactions in highly reactive or eczematous skin, and botanicals carry a small but real risk of sensitization. Given this non-zero risk in compromised skin despite typical low use levels, I score it as gentle but not exceptionally gentle. Safety Notes: In mass-market and prestige skincare, Brassica Oleracea Capitata (cabbage) leaf extract is typically a low-level botanical “support” ingredient, often used at trace levels (~0.0001–0.05%) in emulsions and cleansers where it appears low on the INCI list. Higher levels are mainly seen in natural/“superfood” style leave-on products (serums, gels, masks) where the extract or a concentrated glycerin/propylene glycol extract is used as a featured active, with observed consumer-available use levels up to ~5%; higher would be uncommon due to odor/color, stability, and cost constraints. Rinse-off products generally sit toward the low end, while leave-on formulas account for most of the upper-range usage.