Algae (seaweed) extract is a marine-derived ingredient used in skincare for its hydrating, antioxidant, and skin-conditioning properties, providing polysaccharides, vitamins, and minerals. It is commonly included to support moisture retention and soothe the skin.
| Reported effect | How often | Notes |
|---|---|---|
Contact irritation or mild redness | Uncommon | Generally well tolerated; transient irritation may occur in sensitive skin. |
Allergic contact dermatitis | Rare | Sensitization to marine-derived components has been reported in isolated cases. |
Iodine-related skin reactions | Rare | Some seaweeds contain iodine; relevant for iodine-sensitive individuals. |
Acneiform breakouts | Very rare | Possible in predisposed individuals depending on formulation and iodine content. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.