Zinc Pyrrolidone Carboxylic Acid (Zinc PCA) is a zinc salt of pyrrolidone carboxylic acid used in skincare for its sebum-regulating, antimicrobial, and mild astringent properties. It is commonly included in formulations targeting oily, acne-prone, or seborrheic skin, and also provides some humectant activity.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Transient erythema or stinging, more likely on sensitive or compromised skin. |
Dryness or tightness | Uncommon | Related to its astringent and sebum-reducing action, especially at higher concentrations. |
Allergic contact dermatitis | Rare | Hypersensitivity reactions are infrequently reported. |
Itching | Rare | Localized pruritus that typically resolves on discontinuation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.