K-SECRET Seoul 1988 Retinal is a Korean anti-aging skincare serum containing 2% Retinal Liposome and Black Ginseng Extract, designed to reduce wrinkles, improve skin texture and tone, and brighten the complexion. It also includes ingredients like niacinamide, bakuchiol, Vitamin C, and peptides, which provide antioxidant protection, hydration, and further anti-aging and brightening benefits. The product is intended for nighttime use, requiring a pea-sized amount applied after cleansing and toning and followed by a moisturizer and daily SPF.