CosIQ Vitamin CEF-10% Ethylated Ascorbic Acid Glow Face Serum is a potent antioxidant serum that brightens skin, reduces dark spots, and boosts collagen production. Formulated with 10% ethylated ascorbic acid (3-O-Ethyl Ascorbic Acid), it offers superior stability and penetration compared to traditional vitamin C. Ideal for all skin types, this lightweight serum combats free radicals, evens skin tone, and delivers a radiant glow without irritation.