Polyglutamic acid is a biodegradable peptide-based humectant that binds water to the skin's surface, helping to increase hydration and improve skin smoothness. It is often used alongside or as an alternative to hyaluronic acid.
| Reported effect | How often | Notes |
|---|---|---|
Mild transient irritation or stinging | Rare | Typically associated with sensitive skin or compromised skin barrier. |
Redness or erythema | Rare | Usually mild and self-resolving. |
Allergic contact dermatitis | Very rare | Hypersensitivity reactions are uncommon given its biocompatible nature. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.