Allantoin is a compound (often derived from comfrey or synthesized) used in skincare for its soothing, moisturizing, and keratolytic properties. It helps calm irritation, promotes skin smoothness, and supports the skin barrier.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or redness | Rare | Generally well tolerated; mild irritation possible in sensitive individuals. |
| Allergic contact dermatitis | Very rare | Isolated case reports; allantoin is considered low-sensitizing. |
| Mild stinging upon application | Rare | Typically transient and formulation-dependent. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.