Glucoceramide is an important lipid that plays a crucial role in the barrier function of the skin. Ceramide is a kind of sphingosine lipid composed of sphingosine long chain bases and fatty acids, mainly including ceramide phosphocholine and ceramide phosphoethanolamine, which are the main components of cell membrane and account for 40% to 50% of sebum in the stratum corneum (refer to relevant literature)
