PEG-10 Phytosterol

PEG-10 Phytosterol is a PEGylated plant sterol used mainly as an emollient/emulsifier and barrier-supporting lipid, typically at low concentrations (~0.1–3%) in leave-on products. PEG-modified sterols and nonionic PEG emulsifiers are generally low on patch-test irritancy and are often used in sensitive-skin formulations, with reactions being uncommon and usually limited to highly reactive or severely compromised skin. Given the low inherent reactivity but acknowledging rare intolerance to PEG-derived surfactant-like materials in eczema-prone users, a very gentle score is appropriate. Safety Notes: PEG-10 Phytosterol is typically used as an emulsifying/skin-conditioning sterol derivative and barrier-support ingredient, most often appearing at low levels (~0.05–0.5%) in leave-on creams/lotions and serums where it supports lamellar/emulsion structure. In richer barrier-repair moisturizers, balm-like creams, and specialized high-lipid formulations available to consumers, it is seen at much higher levels (about 1–5%) as part of a sterol/lamellar system; above this, aesthetics and phase stability commonly limit practical OTC use. It is more common in leave-on products than rinse-off, where usage is generally toward the low end due to cost and reduced benefit after wash-off.