Ruscus Aculeatus Root Extract

Ruscus aculeatus (butcher’s broom) root extract is primarily a soothing/vasoactive botanical used at low concentrations in redness and eye-area products, and it is generally well tolerated in routine use. However, as a plant extract containing multiple bioactive constituents, it carries a real (if uncommon) risk of irritant or allergic contact reactions in highly reactive or eczematous skin, especially with impaired barriers or when combined with other actives. Given the sensitive-skin population and the unpredictability of botanical extracts across formulations, a mild irritancy score is the safest clinically aligned assessment. Safety Notes: In commercial skincare, Ruscus aculeatus (butcher’s broom) root extract is most often used as a minor soothing/vasoactive botanical in leave-on creams, serums, and eye products at ~0.01–0.5%, with the lowest observed uses around 0.001% when included as part of complex botanical blends. High-strength consumer-available “circulation/anti-redness” or leg/eye gel concentrates and some natural/INCI-forward formulas can reach ~1–5% when the supplier extract is used at near the top of typical manufacturer recommendations for botanicals (assuming a standard glycerin/propylene glycol extract rather than purified actives). No specific EU/FDA concentration limit applies, so the practical upper end is driven by sensory, stability, and irritation risk rather than regulation; rinse-off products generally sit toward the low end due to shorter contact time.