INCI · other · CIR review pending · used in 3 products
Chitosan
Chitosan is a deacylated derivative of chitin, a natural polysaccharide found in crustacean shells and fungal cell walls. Its CAS number is 9012-76-4. According to CosIng, its official functions are film forming and hair fixing. It is used across a range of cosmetic products including hair care, serums, and masks.
Evidence level
weakEWG score
—Comedogenic
—Category
other● Benefits
Chitosan forms a film on the skin and hair surface, which can support moisture retention and provide a conditioning effect. Its film-forming properties are recognized in official cosmetic ingredient databases (CosIng).
film-forminghair-fixingbarrier-supporthydrating
● Cautions
