Polysorbate 80

Polysorbate 80 is a nonionic surfactant/solubilizer typically used around ~0.1–5% in leave-on products (and sometimes higher in rinse-off or pharmaceutical preparations). While generally well-tolerated, surfactants can disrupt the skin barrier and clinical patch testing documents occasional irritant reactions—especially in compromised skin (eczema, post-procedure) and with higher concentrations or occlusive use. Given its role in increasing penetration/solubilizing other ingredients and the real-world risk in reactive patients, I rate it as mild rather than truly gentle. Safety Notes: In commercial skincare, Polysorbate 80 is commonly used at very low levels (~0.05–0.5%) as a solubilizer for fragrance/essential oils in toners, micellar waters, and sprays, and around 0.5–5% as an emulsifier/dispersant in creams, cleansers, and masks. The highest consumer-available levels are seen in specialty oil cleansers, makeup removers, bath/shower oils, and some anhydrous-to-milky rinse-off formats where it can function as a primary self-emulsifier, reaching ~10–20% without being prescription or professional-only. No specific EU/FDA cosmetic maximum applies; practical limits are driven by irritation potential, sensory tackiness, and emulsion/solubilization requirements, with rinse-off products more likely to use the upper end than leave-on products.

Suitability