Ceramide AS is a type of Ceramide.
Ceramides are intercellular lipids naturally found in our skin that bonds dead skin cells together to create a barrier. They are known for their ability to hold water and thus are a great ingredient for dry skin.
Ceramide As is a rare cosmetic ingredient, with about 0.20% of the products in our database containing it.
CosIng is the European Commission database for information on cosmetic substances and ingredients.
SkinSort uses CosIng to source some of it's data on ingredient names and functions.