The functions and effects of ceramides are maintenance of the skin barrier, moisturizing, bonding, anti-aging and regulation of cell function. 1. Maintaining the skin barrier: As the main component of intercellular lipids in the stratum corneum, ceramide, together with cholesterol and fatty acids, forms an important skin barrier. 2. Moisturizing: Ceramide can enhance the bonding ability of water molecules, and maintain the moisture of the skin through the formation of a mesh structure in the stratum corneum, which plays a moisturizing role. 3. Adhesion: Ceramide can enhance the adhesion between keratinized cells, improve skin dryness and reduce the occurrence of skin flaking. 4. Anti-aging: Ceramide can improve skin dryness, flaking, roughness and other conditions, but also increase the thickness of the epidermal stratum corneum of the skin, improve the skin’s ability to hold water, to reduce wrinkles, enhance skin elasticity, and slow down the aging of the skin has a certain role. 5. Regulate cell function: Ceramide plays an important role in cell growth, proliferation, differentiation, apoptosis and damage. Although ceramide has a lot of efficacy, but can not be abused, it is recommended to consult a professional doctor, according to the specific conditions and personal circumstances of reasonable and standardized use, in order to avoid adverse effects.