Cosmedica Skincare Vitamin C Power Serum offers almost 80% pure L-Ascorbic Acid. The innovative science of Instant Activation ensures the freshest, oxidation-free formula with zero preservatives. This gentle yet powerful serum delivers a boost of Vitamin-C with prolonged reservoir effects for lasting protection and prevention. In seven days, instantly see and feel a difference in skin tone and brightness, antioxidant protection, and reduction in the appearance of fine lines and wrinkles.