Cosrx The 6 Peptide Skin Booster Serum, a facial booster with peptides and niacinamide, is an excellent solution for dull, tired, and problem skin. It provides an instant boost, improves skin texture, and brightens the complexion. As the first step after cleansing, it delivers essential hydration and nourishment to help the skin regain a healthy glow. The serum increases collagen production, which helps restore elasticity and visibly firms sagging contours. At the same time, it regulates sebum production and cares for pores by refining them and reducing their visibility. Overall, it strengthens the skin’s natural defenses and increases its resistance to adverse external factors. It also helps slow the signs of aging. The lightweight, watery texture absorbs quickly. Multiple layers can be applied to enhance the effectiveness of subsequent skincare products.