N-Acetyl Glucosamine ek amino sugar hai jo hyaluronic acid ke liye precursor hai. Isse skin ka hydration improve hota hai aur hyperpigmentation kam hota hai kyunki ye melanin production ko rok deta hai. Jab ise niacinamide ke saath combine kiya jaye toh uneven skin tone ke liye aur bhi accha kaam karta hai.