Product Details + A serum contains 24% pure Vitamin C that rejuvenates sagging skin while promoting clarity and radiance by caring for blemishes and uneven skin tone. High-function vitamin C serum containing 24% high-performance pure vitamins for bright and radiant skin with a powerful toning effect. Trip collagen and triple tone care offer brightening care, firming care, whitening functionality, and calming care to the skin. 5-layer Melasma care, elasticity improvement test, tone improvement test proved with determined non-irritating for the sensitive skin.