Brand from Japan: TSUDA SETSUKO. A beauty essence containing 5 highly penetrating * vitamin C derivatives.Up to the stratum corneum.A beauty essence containing 5 types of vitamin C derivatives such as ultra-high penetration vitamin C derivatives.Contains 5 vitamin C derivatives and 5 barrier-up ingredients in a unique balance.Firmly penetrates * 2 to create bright, well-textured skin.It protects the skin from oxidized sebum and external stimuli, and leads to skin that is resistant to fluctuations and external stress.1 Isostearyl ascorbic acid 2Na (moisturizing ingredient)2 Up to the stratum corneumHow to use:After washing your face, gently apply it to the skin prepared with booster conditioner and lotion.