N-acetyl-D-glucosamine, also known as NAG, is a naturally occurring compound that plays a vital role in the production of hyaluronic acid and collagen in the body. When used in skin care products, it has been found to promote skin hydration, improve skin barrier function, and enhance the overall appearance of the skin. Its ability to boost the production of hyaluronic acid makes it an excellent choice for addressing dryness, fine lines and wrinkles, making it a valuable addition to anti-aging formulas.