K-Secret Seoul 1988 Glow Serum: Niacinamide 15+Yuja is a brightening serum that helps fade dark spots and improve skin radiance. With 15% niacinamide and yuja fruit oil, it evens skin tone and leaves your complexion looking fresh and glowing. Key Benefits Fades Dark Spots: 15% niacinamide targets pigmentation and uneven skin tone. Brightens Skin: Yuja fruit oil helps boost radiance and refresh dull skin. Hydrating & Soothing: Panthenol, glutathione, and squalane deeply moisturize and protect skin. Moisture Lock: Agar gum capsules help prevent moisture loss for longer-lasting hydration. Light Texture: Non-greasy formula absorbs easily into the skin. How to Use After cleansing and toning, apply an even layer to the face and gently pat until absorbed.