Propolis Extract

Propolis extract is used for soothing/antimicrobial benefits (commonly ~0.1–5%), but it is a well-documented contact allergen with positive patch-test reactions reported, especially in individuals with eczema, impaired barriers, or other bee-product sensitivities. While many users tolerate it, the risk of delayed sensitization and subsequent flare-ups is clinically meaningful, so I score it as a notable irritant requiring careful introduction and patch testing in sensitive populations. Safety Notes: In mass-market and sensitive-skin leave-on products (toners/lotions/serums), propolis extract is often used at low supportive levels (~0.05–1%) due to allergen potential and variability of resinous extracts, with many formulas clustering around 0.5–5%. High-strength consumer products marketed as “propolis ampoules/essences” or “propolis syrups” can reach ~10–30% when using standardized propolis extract solutions (typically in water/glycerin/propylene glycol), while rinse-off cleansers and masks more commonly sit in the lower end because of short contact time.