This is a vitamin C serum focusing on antioxidant and brightening benefits. It adopts a formula of highly stable vitamin C derivatives (or encapsulated pure vitamin C) to solve the pain points of traditional pure vitamin C: easy oxidation inactivation and high irritation, while retaining strong antioxidant and brightening power. Vitamin C helps neutralize free radicals, resist external oxidative damage and delay skin dullness and aging. It also inhibits melanin production, accelerates keratin metabolism, fades acne marks, sun spots and uneven skin tone, leaving the skin clearer, more even and radiant. The formula is compounded with vitamin E for synergistic antioxidant effect, and sodium hyaluronate for hydrating and soothing, reducing the dryness caused by vitamin C and improving skin tolerance. The texture is usually fresh watery or micro-serum texture, absorbs quickly and is non-sticky. It is recommended for morning use with sunscreen for better effect; it can also be used at night for repair and brightening. Light-proof packaging design better maintains ingredient activity. Long-term use improves dullness, yellow tone, acne marks and pigmentation, leaving the skin with a clear, even and healthy glow.