INCI · other · CIR review pending · used in 1 products
Ceramide AS (0.05 Ppb)
Ceramide AS, formerly known under the INCI names Ceramide 4 or Ceramide 5, is an N-acylated sphingolipid consisting of sphingosine with the D-erythro structure linked to an alpha-hydroxy saturated or unsaturated fatty acid. It is classified as a skin-identical ingredient, meaning it is naturally found in human skin. Its CAS number is 100403-19-8 and EC number is 309-560-3. It is used in cosmetics primarily for hair and skin conditioning purposes per official CosIng classification.
Evidence level
weakEWG score
—Comedogenic
—Category
other● Benefits
As a skin-identical ceramide, Ceramide AS supports the skin's natural lipid barrier structure. It is used for skin and hair conditioning, helping to maintain moisture and reinforce the barrier function.
barrier-supporthydratingskin-identical
● Cautions
