Chondrus Crispus
INCI: Algae
Reviewed by Kate · Last updated 5 Aug 2026
Also known as: Algae, Irish Moss Extract, Carrageenan
Is a type of seaweed that's also known as red algae Contains skin-beneficial compounds like beta-carotene and potent antioxidants
EWG Safety Score
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What Is Chondrus Crispus?
Chondrus crispus, also known as red algae, is a type of seaweed that’s a rich source of many nutrients for skin, including the pigment beta-carotene and potent antioxidants zeaxanthin, lutein, which help protect skin from the visible effects of blue light exposure. Of course, the antioxidants in red algae have wider-reaching benefits, too.
The natural polysaccharides, peptides, and amino acids in red algae also help skin to stay hydrated; meanwhile, the numerous antioxidants in this and other types of algae can help shield skin from damaging airborne pollutants.
Chondrus crispus contains a compound known as carrageenan, which forms a flexible film on skin that offers further defense against environmental stressors.
Benefits for Your Skin
Clinical Evidence & References
Published Research
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Irish moss (Chondrus crispus): Marine polysaccharides for skin Mar Drugs, 2015
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