Chondrus Crispus (Irish moss) extract is a red algae-derived ingredient rich in polysaccharides (notably carrageenans), used in skincare as a humectant, film-forming, and thickening agent that helps retain moisture and improve skin feel. It also provides minerals and antioxidant compounds, contributing to a soothing, conditioning effect.
| Reported effect | How often | Notes |
|---|---|---|
Skin irritation or redness | Rare | Generally well tolerated; mild irritation possible in sensitive individuals. |
Allergic contact dermatitis | Rare | Sensitization to algae extracts or formulation components is uncommon but reported. |
Iodine sensitivity reaction | Very rare | Seaweed-derived ingredients may contain iodine; relevant only for highly iodine-sensitive individuals. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.