Poloxamer 184

Poloxamer 184 is a nonionic surfactant/solubilizer used mainly to stabilize formulas and aid cleansing, typically at low percentages where it is generally well tolerated. Clinical and patch-test experience with poloxamers shows a low rate of irritation and sensitization, but as a surfactant class ingredient it can still cause mild stinging or barrier dryness in highly reactive or eczema-prone skin, especially when used in leave-on or cleansing products repeatedly. For patient safety in severely sensitive populations, I score it as very gentle rather than inert. Safety Notes: In commercial skincare, Poloxamer 184 is most often used as a mild nonionic solubilizer/surfactant and formulation aid, appearing at very low levels (~0.05–0.5%) in leave-on serums, micellar-type waters, and emulsions to help wetting/solubilization and improve sensory. Higher levels are observed in rinse-off cleansers and makeup-remover gels/foaming washes where it can function as a primary or co-surfactant, with consumer products reaching ~5–10% for stronger cleansing/solubilizing performance. Concentrations above this are uncommon in OTC skincare due to viscosity/texture, cost, and irritation/defatting risk, and because other surfactants are typically blended to meet foam and detergency targets.