Ceramide, also known as sphingomyelin, is a lipid that exists in the skin and plays an important role in the formation of the cuticle of the epidermis. A structural unit common to (nerve) sphingolipids. Fatty acids have a structure of an acid amide bond on the amino group of sphingosine. If a sugar is bound to it, it becomes a sphingolipid, and if it binds to choline phosphate, it becomes a (neuro) sphingomyelin. Ceramide is an intermediate metabolite of sphingolipids, especially occupying an important position in biosynthesis. Only small amounts are present outside of platelets. Patients with Fabry disease, one of hereditary lipidosis, accumulate large amounts of ceramide in the cerebellum and kidneys. When the skin appears dry, desquamated, and cracked, and its barrier function is significantly reduced, skin supplementation with ceramide can quickly restore moisturizing and barrier functions.
Since collagen has good biocompatibility, biodegradability and biological activity, it has been widely used in food, medicine, tissue engineering, cosmetics and other fields. For example, the traditional Chinese collagen health product "Ejiao" is mainly made from donkey skin (in fact, the collagen contained in donkey skin), which has a high nourishing and health-care effect, and has a reputation of one of the three treasures of Chinese medicine.
Hyaluronic acid is a linear polymer polysaccharide composed of disaccharide units (glucuronic acid-N-ethylthioglucosamine), which is a naturally occurring substance in tissues. Hyaluronic acid is abundant in the connective tissue and dermis of the human body. It is a transparent gel-like substance with strong moisturizing function. One gram of hyaluronic acid can absorb 500C.C of water, which is equivalent to 500 times the water absorption capacity of glycerol. It exists widely in the connective tissue, mucous tissue, lens of the eyeball and the capsule of some bacteria in nature. It plays an important role in the dermis of human skin, regardless of the overall maintenance of the tissue structure. Or transport between cells has important functions. According to different maintenance time, it is divided into small particles and large particles of hyaluronic acid.