Zein is a corn-derived prolamin protein used in cosmetics primarily as a natural film former and hair/skin conditioning agent. It creates a flexible, water-resistant coating that can improve product adhesion, gloss, and sustained delivery of other ingredients.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation | Rare | Mild transient redness or stinging possible in sensitive individuals. |
| Allergic contact dermatitis | Rare | As a protein, it carries a low theoretical sensitization potential. |
| Corn/grain allergy cross-reaction | Very rare | Possible relevance in individuals with known corn protein allergy. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.
Peer-reviewed papers on this ingredient, via PubMed.