What it is
Phytosteryl Isostearate is a lipid ester formed by combining phytosterols, which are plant-based cholesterol analogs, with branched isostearic acid. In sunscreens and creams it functions as an emollient that smooths the skin surface and improves the spreadability and feel of the oil phase. Its phytosterol portion gives it good compatibility with skin lipids.
Safety & warnings
Phytosteryl esters are generally regarded as gentle, well-tolerated emollients with low irritation potential and are commonly used in formulas intended for dry or sensitive skin.
Origin & sourcing
Wholly or partly natural-derived. The phytosteryl portion is sourced from plant sterols, while it is reacted with isostearic acid to form the finished ester.
Questions everyone asks
What is Phytosteryl Isostearate used for?
It is an emollient and skin-conditioning ester that softens skin and improves the texture and spread of a formula's oil phase.
Is it derived from plants?
Its sterol portion comes from plant sources, and it is combined with isostearic acid to make the finished cosmetic ester.