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
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Paula Begoun is the best-selling author of 20 books about skincare and makeup. She is known worldwide as The Cosmetics Cop and creator of Paula’s Choice Skincare. Paula’s expertise has led to hundreds of appearances on national and international radio, print, and television including:
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