Ch
Chondrus Crispus
Chondrus CrispusHydrator
A red seaweed that helps hold water on skin and leaves a smooth feel.
What it does
It’s rich in carrageenan, a gel-forming sugar that holds water and leaves a light film on skin.
The evidence, graded
expert consensusUS safety reviewers assessed 60 ingredients from red seaweeds, which they say are mostly used to condition skin. Their final report names Irish moss (Chondrus crispus), its extract and Corallina officinalis extract among the 16 they judged safe as used in cosmetics. For the other 44 they found the data insufficient. They add that makers should keep checking for and limiting impurities such as arsenic, heavy metals and pesticides.Ferguson 2026 · International Journal of Toxicology ↗
Graded per the methodology: strong · moderate · emerging · expert consensus. A weak source on a strong claim gets the weaker label.
Browse all 809 ingredients — grouped by what they do, each with whatever evidence we can cite.
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