The ingredient, explained

Chitosan

Research examined CHITOSAN under the stated study conditions.

Film formingHair fixing

Explore connections

Ingredient guide

What it is and what it does

Chitin, deacylated

About this ingredient: EU CosIng ingredient registry (via Open Beauty Facts taxonomy) ↗

Film forming: Leaves a continuous layer on skin, hair or nails after application.
Hair fixing: Helps hold hair in a chosen style.

Function definitions: European Commission ingredient function definitions (SCCNFP/0299/00, pages 16 to 20) ↗

Registry functions describe possible formulation roles, not results for a finished product. A dictionary entry is not an approval or a safety assessment.

A closer look

What the research shows

Human oral care research

A chitosan-containing oral gel reduced postoperative pain, swelling and trismus compared with placebo.

What this does not tell us

36 patients. Chlorhexidine, dexpanthenol and allantoin are co-actives; oral surgical healing cannot establish isolated chitosan facial-skincare benefit.

Sources for this summary. PubMed 32683390 ↗

Research review checked Oct 1, 2026

Read exact local candidate abstracts first; select identity-relevant papers; targeted primary PubMed/publisher searches. This is not an exhaustive systematic review.