While retaining the ingredients of MQ-1, vitamin C derivatives are added to this serum to further improve the tone of the skin. Among the various types of vitamin C derivatives, those with a particularly excellent moisturizing effect are adopted, and can be expected to increase the amount of keratin moisture, approach dry fine wrinkles, and improve the texture of the skin. For clear and firm skin without dullness. A talented essence that won the first place in the ranking of serums recommended by beauticians.