Ceramide is a kind of neurosphingomyelin, which is composed of fatty acid and long chain base of neurosphingomyelin, and it has the function of moisturizing skin, anti-aging and regulating cell apoptosis. 1. Skin moisturizing: ceramide can repair the stratum corneum, enhance the skin’s defense ability, and can help skin hydration, can improve dry skin. 2. Antioxidant: Ceramide can promote skin metabolism, can be antioxidant, make the skin firmer, shiny and so on. 3. Regulation of apoptosis: It mediates the aging and apoptosis of endothelial cells, participates in the process of oxidative stress, NO synthesis and release, and then regulates vasoconstriction and diastole, vascular permeability and vascular renewal. Normal synthesis and degradation of ceramide plays an important role in normal growth and development of organisms. Abnormal metabolism can also lead to a variety of diseases, such as Faber’s disease and liver disease.