A sheet mask with a serum containing Vitamin C and Niacinamide offers a powerful, convenient skincare treatment that brightens and hydrates both the face and neck. The combination of these two ingredients effectively fades dark spots and evens skin tone by suppressing melanin production and inhibiting its transfer to skin cells. While Vitamin C provides potent antioxidant protection to restore radiance and boost collagen, Niacinamide (Vitamin B3) works to strengthen the skin's moisture barrier, reduce redness and inflammation, and minimize the appearance of pores. Together, they deliver a concentrated dose of nutrients that revitalize tired, dull skin, leaving it visibly brighter, plumper, and more even-toned after just one use.