Seoul retinal creams, such as those from K-Secret Seoul 1988, are anti-aging moisturizers that target fine lines, uneven skin tone, and rough texture. They use a liposome-encapsulated retinal, a potent form of vitamin A, to deliver fast-acting results while minimizing irritation. These creams also contain other beneficial ingredients, including fermented extracts, peptides, and vitamins to hydrate, brighten, and strengthen the skin barrier.