Algae Extract

A broad class of seaweed and microalgae extracts, commonly used in skincare for water retention and antioxidant properties. Most forms are well tolerated, though individuals sensitive to iodine or seaweed should patch test.

Cosmetic information for general education, not medical advice. A verdict is a reading of the published evidence, never a guarantee for your skin: any ingredient can irritate someone, so patch test new products and see a professional if you react. Concern is graded on cited evidence, never on hazard-score lists. See how we score.