SEOUL 1988 GLOW SERUM : NIACINAMIDE 15% + YUJA 30ml, K-SECRETPRODUCT INFORMATION This is a high potency vitamin tone improving serum that targets dullness, dryness, uneven tone, and rough skin texture at the same time. Formulated with 15% high concentration niacinamide and yuzu extract, it helps support brightening, anti aging care, tone evenness, and hydration for an overall radiant complexion. The lightweight, hydrating texture is suitable for all skin types, and is especially ideal for dull, dry skin,