An powerful, advanced and stable antioxidant formula by Medik8. The Medik8 Beta AOX professional strength serum is a powerful, advanced and stable antioxidant system with 40 times greater antioxidant performance than that of regular L-ascorbic acid. Blue AOX increases the skin's ability to repair itself and helps to protect and maintain collagen levels to prevent fine lines and wrinkles. Medik8's patented copper PCA, a revolutionary ingredient from the Medik8 Firewall research programme that has incredible antioxidant performance without the use of vitamin C. Many people find vitamin C in the form of L-ascorbic acid irritating (regardless of which brand) which is why copper PCA represents a brilliant alternative. Also contains beta-glucan and niacinamide to help soothe skin prone to breakouts.