Hydrolyzed Algin is an enzymatically or chemically broken-down form of algin (alginic acid derived from brown seaweed), used in skincare as a humectant, film-forming, and skin-conditioning agent. The lower molecular weight improves solubility and skin compatibility compared to native algin.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation | Rare | Occasional transient redness or stinging, typically in sensitive skin or at high concentrations. |
Allergic contact dermatitis | Very rare | Isolated hypersensitivity reactions; iodine-containing algae sources may rarely concern iodine-sensitive individuals. |
Contact urticaria | Very rare | Rarely reported with marine-derived ingredients in predisposed individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.