Why Vitamin C? Dermatologists Say Vitamin C Is the Ultimate Brightening, Anti-Aging Antioxidant. Helps reduce the look of fine lines, wrinkles, helps with loss of firmness; discoloration, blemish-prone, and sensitive skin. Our Vitamin C, E serum is a morning skin care staple with major collagen production, brightens skin, protects against damaging free radicals and harmful blue light. Improves absorption and penetration of other skincare products.