COSRX The Vitamin C 23 Serum

This is The Vitamin C 23 Serum purchased from COSRX. It is an effective serum for whitening because it contains a high concentration of vitamins. It is especially good for evening out skin tone and for treating blemishes caused by UV rays. It is also said to be effective for wrinkle improvement. If the high concentration is too much for you, they also sell a version with a lower vitamin content, so you can purchase the one that best suits your skin condition.