K-Secret SEOUL 1988 Glow Serum with Niacinamide 15% and Yuja is a concentrated brightening serum formulated to help improve the appearance of dullness, uneven-looking skin tone and lack of radiance. Featuring 15% Niacinamide, the formula is designed to support a clearer, smoother and more balanced-looking complexion while helping minimise the visible effects of excess oil and uneven skin tone. Yuja adds a refreshing and brightening-focused element to the formula, helping the skin appear more luminous and revitalised. The lightweight serum texture makes it easy to layer into your existing skincare routine without feeling overly heavy on the skin. It can be applied after cleansing and toning, followed by your preferred moisturiser and sunscreen during the daytime. With consistent use, the serum helps promote a fresher, more radiant-looking complexion and can be particularly useful for skincare routines focused on brightness and overall skin clarity. Introduce it gradually if your skin is sensitive to concentrated active ingredients.