Red algae extract is a marine-derived ingredient rich in polysaccharides, vitamins, and minerals used in skincare for its hydrating, antioxidant, and skin-conditioning properties. It can help retain moisture and may support skin barrier function.
| Reported effect | How often | Notes |
|---|---|---|
| Contact irritation (redness, stinging) | Uncommon | Typically mild and transient, more likely in sensitive skin or high concentrations. |
| Allergic contact dermatitis | Rare | Possible sensitization to algae proteins or co-formulated components. |
| Iodine-related concern | Very rare | Marine extracts may contain trace iodine; theoretical relevance for iodine-sensitive individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.