Brand from Japan: DR.Ci:Labo. Ultimate Collaboration Pure Retinol & Vitamin C.Pure retinol (skin regulating ingredient) and high penetration vitamin C (APPS) (skin regulating ingredient) are blended simultaneously.These two major ingredients work on the inner skin's “elasticity and firmness” and on the surface of the skin's “moisture, pores, texture, and dullness”.Because they are delivered at the same time, they support the skin while complementing each other.Skin will be bouncy, firm, and clear.Freshly created in 2 seconds: A single serum is created by shaking for 2 seconds each time you use the product.How to use:After cleansing and toning your skin, shake the container well, then take an appropriate amount (2-3 pumps) in your hands and apply to your entire face.Then apply moisturizer. Shake well before each use.