What it is
PEG-20 Glyceryl Triisostearate is formed from glycerin esterified with isostearic acid and ethoxylated with about twenty units of ethylene oxide. This structure makes it a nonionic emulsifier with emollient character that helps disperse oils and improve skin feel. It is used in emulsions including sun care formulas.
Safety & warnings
This PEG ester emulsifier is generally well tolerated and is not associated with notable allergen or comedogenicity concerns at typical use levels.
Origin & sourcing
It is synthesized from glycerin and isostearic acid, then ethoxylated; the fatty acid portion may be plant- or synthetically derived and the PEG portion is synthetic.
Questions everyone asks
What kind of ingredient is this?
It is a nonionic emulsifier and emollient made from glycerin, isostearic acid, and ethylene oxide units.
What does it do in sunscreen?
It helps emulsify oil and water phases and contributes a smooth, conditioned skin feel.