Algin (sodium alginate) is a polysaccharide derived from brown seaweed used in skincare as a thickening, gelling, and film-forming agent. It helps stabilize emulsions and provides a hydrating, smooth texture, commonly featured in peel-off masks.
| Reported effect | How often | Notes |
|---|---|---|
| Skin irritation or redness | Rare | Generally well tolerated; mild irritation possible in sensitive skin. |
| Allergic contact dermatitis | Very rare | Isolated reports, may relate to algae sensitivity or contaminants. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.