PENTAERYTHRITYL TETRAISOSTEARATE
Is PENTAERYTHRITYL TETRAISOSTEARATE safe for seborrheic dermatitis?
Pentaerythrityl Tetraisostearate is not automatically unsafe for seborrheic dermatitis, and its existing label remains lower concern, but a strict Malassezia-screening routine may avoid it during an active flare. It improves slip, adhesion and richness; it is not a treatment.
A cosmetic safety review supports the assessed uses of this tetraester. Separately, practical Malassezia screens flag long-chain fatty esters because breakdown could release fatty acids, while laboratory growth evidence concerns free fatty acids rather than this intact ingredient in people. The concern is therefore theoretical, and the finished formula and your repeat response remain decisive.
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What is it?
A quick identity check, separate from the seb derm guidance above.
01 / 05- Material type
- Four-arm isostearate ester
- Ingredient family
- Pentaerythrityl tetraester
- Cosmetic function
- Skin Conditioning - Emollient, Surfactant - Cleansing, Surfactant - Emulsifying
What is PENTAERYTHRITYL TETRAISOSTEARATE used for in skincare?
Pentaerythrityl Tetraisostearate is a large emollient made by attaching four branched isostearic-acid chains to pentaerythritol. It gives rich slip, helps pigments adhere and can bind oils without a very runny feel. It is often combined with waxes, pigments, silicones and other emollients in makeup, balms and long-wear products.