K Secret Seoul 1988 Retinal 2% Serum offers a potent and stable form of vitamin A to help improve skin texture and reduce signs of aging. With a 2% retinal concentration, this serum effectively promotes cell turnover, brightens complexion, and smooths fine lines. Its lightweight formula absorbs quickly, making it suitable for daily use while supporting skin renewal for a healthier, more radiant appearance. Ideal for those seeking advanced skincare results with a trusted retinal derivative.