PEG-20 glyceryl triisostearate

PEG-20 glyceryl triisostearate is an ester of the fatty acid isostearic acid combined with polyethylene glycol and glycerine. It may be animal-derived or synthetic (Paula’s Choice uses the latter).

Its high molecular weight keeps it from penetrating past skin’s surface. It has emollient and skin-softening properties as well as being an emulsifier and mild cleansing agent, where it’s often seen in oil-based formulas due to its ability to help oily ingredients rinse from skin without leaving a greasy residue.

This ingredient has undergone extensive toxicology review and is considered non-irritating and safe as used in rinse-off or leave-on cosmetics.

References for this information:

Toxicological Research, June 2015, pages 105–136

See ester stearic acid glycerin polyethylene glycol

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