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Chitosan

What Chitosan is & what it does

Chitosan is a polysaccharide derived from chitin, typically sourced from the shells of crustaceans, and is used in cosmetics as a film former and thickener. In skincare and sunscreen formulas it helps form a light, flexible film on the skin surface and can improve the staying power of the product. A notable property is its film-forming ability, which can give a smooth, conditioned skin feel.

What does Chitosan do in skincare?

Chitosan is a polysaccharide used as a film former and thickener in cosmetics. In skincare and sunscreen formulas it helps form a light, flexible film on the skin and can improve the staying power of the product. It can give a smooth, conditioned skin feel.

Is Chitosan vegan?

Chitosan is most commonly derived from chitin in the shells of crustaceans, so conventional Chitosan is usually not vegan. Plant or fungal-derived versions do exist and would be suitable for vegan formulas. Check the brand's sourcing if vegan status is important to you.

Is Chitosan safe in skincare?

Chitosan is widely used as a film former and is generally regarded as a gentle, well-tolerated cosmetic ingredient. Because it commonly comes from shellfish, people with shellfish allergies may prefer to be cautious and check the source. Patch testing is sensible for sensitive skin.

Sunscreens with Chitosan

We rate 8 sunscreens that contain it:

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