Pentaerythrityl (commonly seen as pentaerythrityl tetra-di-t-butyl hydroxyhydrocinnamate or related esters) is used in cosmetics primarily as an antioxidant to prevent oxidation of oils and other ingredients, and as a skin-conditioning emollient. It functions mainly as a stabilizing base ingredient rather than a therapeutic active.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation | Rare | Occasional transient redness or stinging, generally in sensitive individuals. |
Allergic contact dermatitis | Very rare | Isolated case-type sensitization reactions reported; uncommon overall. |
Eye irritation | Rare | Possible mild irritation if product contacts the eyes. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.