K-Secret Seoul 1988 Niacinamide 15% + Yuja Glow Serum is a brightening facial serum designed to support dull, uneven and tired-looking skin. The formula features 15% niacinamide to help improve the appearance of uneven skin tone, visible pores and dullness, while yuja supports a fresh, radiant-looking complexion. This glow-focused serum helps refine skin texture, enhance clarity and promote a healthier-looking finish with regular use. Its lightweight texture layers easily under moisturiser and sunscreen, making it suitable for daily brightening and pore care routines.