CosIQ Vitamin CEF-20% Ethylated Ascorbic Acid Glow Face Serum is a high-potency vitamin C serum featuring 20% 3-O-Ethyl Ascorbic Acid (EAA) for advanced brightening and antioxidant protection. This dermatologist-formulated serum visibly reduces dark spots, stimulates collagen production, and defends against environmental stressors. The ethylated form ensures superior stability and skin penetration without irritation, making it ideal for all skin types seeking radiant, even-toned complexion.