Polyglyceryl-4 Oleate

Polyglyceryl-4 oleate is a nonionic emulsifier/surfactant typically used at low percentages (about 0.5–5%) to solubilize oils and improve spread, and it is generally considered well-tolerated compared with harsher anionic surfactants. However, as a surfactant/emulsifier it can still contribute to barrier disruption and stinging in compromised or eczematous skin, especially in leave-on formulas or when combined with other cleansing agents. Given the low but real irritation potential in highly reactive populations, it best fits a gentle (not inert) score. Safety Notes: Polyglyceryl-4 Oleate is used as a nonionic emulsifier/solubilizer and W/O co-emulsifier, so it commonly appears at very low levels (~0.05–0.3%) in leave-on serums/oils and micellar-type systems to aid solubilization and sensory. In consumer rinse-off cleansing oils/balms and W/O creams it is frequently used around 1–5% as a primary or co-emulsifier, with high-strength OTC cleansing oils/balms and anhydrous makeup removers reaching ~8–10% to ensure robust self-emulsification on rinse; above this is uncommon due to viscosity, feel, and potential clarity/sensory drawbacks rather than regulatory limits.