COSRX Advanced The Vitamin C 23 Serum 20mlCOSRX The Vitamin C 23 Serum is a highly concentrated formula with 23% pure stabilized vitamin C, designed to brighten dull skin, fade acne scars, and hyperpigmentation, while firming and plumping the skin. This potent vitamin c serum helps improve skin tone, reduce wrinkles, and target uneven skin texture, providing a vitamin C boost for a more radiant complexion. The face serum is divided into two layers oil on top of the serum to prevent oxidation