KSECRET SEOUL 1988 Serum (Retinal Liposome 2% + Black Ginseng) is a Korean anti-aging serum (30ml) designed to treat wrinkles, uneven texture, and pigmentation. It features 2% retinal liposome for fast-acting, stable retinol benefits, paired with 58% Black Ginseng for antioxidant protection and hydration.