N-Acetylglucosamine, often abbreviated as NAG, is a naturally occurring amino sugar derived from glucose. It plays a crucial role in the formation of glycosaminoglycans, which are essential components of connective tissues, cartilage, and joint health. NAG is commonly found in the shells of crustaceans and is also produced in the human body. This compound is often used as a dietary supplement to support joint function and may help alleviate symptoms of osteoarthritis. Additionally, N-Acetylglucosamine is being studied for its potential benefits in skin health and its role in the synthesis of hyaluronic acid, a substance that helps maintain skin hydration.