Cimicifuga Racemosa Root Extract

Cimicifuga racemosa (black cohosh) root extract is a botanical antioxidant/soothing-type additive typically used at low concentrations, but like many plant extracts it contains multiple bioactive constituents that can trigger irritant reactions in reactive or eczema-prone skin. Human topical safety data are limited compared with well-characterized emollients, and botanical extracts have a meaningful background rate of stinging/dermatitis in sensitive-skin patch testing, especially in compromised barriers. Given the uncertainty and the need to protect highly sensitized patients, I score it as mild rather than gentle. Safety Notes: In commercial skincare, Cimicifuga racemosa (black cohosh) root extract is most often used as a supporting botanical in anti-aging/soothing leave-on creams and serums at very low levels (~0.01–0.1%), consistent with typical supplier-recommended use levels for standardized botanical extracts. Higher-strength consumer products (botanical “active” serums, concentrated ampoules, and some natural/indie formulas using glycerin/propylene glycol extracts or extract blends) can reach ~1–5% while remaining OTC; above this is uncommon due to odor/color impact, solubility/stability constraints, and increased sensitization risk. Rinse-off products generally sit at the low end because of brief contact time, while leave-on products account for the highest observed concentrations.