COSRX The Vitamin C 13 Serum 20ml SUNSCREENS Always patch test if you

Always patch test if you have extreme sensitivities

The inclusion of niacinamide and hyaluronic acid means brighter

How long until I see results

layer a light concealer over specific blemishes or dark spots

quenching skin without heavy residue or stickiness

COSRX The Vitamin C 13 Serum 20ml SUNSCREENS Always patch test if youCOSRX The Vitamin C 13 Serum: An Entry Level L Ascorbic Acid for Brightening Beginners COSRX's Vitamin C 13 Serum sits at the gentler end of the pure L ascorbic acid category. At 13% L ascorbic acid, this is a true vitamin C serum, not the more stable ascorbyl derivatives that many K beauty brands hide behind. It's formulated specifically for users who want measurable brightening and antioxidant protection but aren't ready to tolerate a 20%