Algin

A natural polysaccharide derived from brown seaweed, used as a thickener and gelling agent in cosmetics. It has a strong safety history in topical formulations and is well tolerated across skin types.

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.