(TrendHunter.com) The K-SECRET SEOUL 1988 Retinal Serum is a topical skincare product that boasts a high concentration of Retinal Liposome — a specific stabilized vitamin A derivative — and a notable percentage…(TrendHunter.com) The K-SECRET SEOUL 1988 Retinal Serum is a topical skincare product that boasts a high concentration of Retinal Liposome — a specific stabilized vitamin A derivative — and a notable percentage…