Ceramide is a kind of aminolipids composed of long chain bases and fatty acids of sphingosine.Amide (Ceramide in Ceramide as the skeleton of a class of phospholipid, basically have Ceramide choline phosphate and Ceramide ethanolamine phosphate, phospholipids are the main components of the cell membrane, corneous layer in 40% ~ 50% of sebum consists of Ceramide, Ceramide is the main …