C18 dihydro ceramide (d18:0/18:0) is widely used in skincare and cosmetic formulations due to its ability to enhance the skin barrier function. It helps restore and maintain the skin’s natural lipid layer, improving hydration and reducing moisture loss. This makes it effective in treating dry, irritated, or aging skin. Additionally, it is utilized in research to study lipid metabolism and cell signaling pathways, particularly in understanding the role of ceramides in cellular processes like apoptosis and inflammation. Its stability and structural properties also make it a valuable component in the development of lipid-based drug delivery systems.