N-Acetyl-D-galactosamine is widely used in biochemical research and pharmaceutical applications. It serves as a key component in the synthesis of glycoproteins and glycolipids, which are essential for cell signaling and communication. This compound is also utilized in the development of vaccines, particularly in the production of conjugate vaccines to enhance immune response. Additionally, it plays a role in studying glycosylation processes and understanding diseases related to carbohydrate metabolism. In the cosmetic industry, it is incorporated into skincare products for its moisturizing and skin-conditioning properties. Its applications extend to the food industry as well, where it is used as a dietary supplement to support gut health and improve digestion.