Pure Vitamin C Antioxidant Serum 2 x 15mls Pure vitamin C (ascorbic acid) is clinically proven to boost collagen and fight free radical damage, but is also known for being unstable and losing its power over time. Medik8 has stabilised the ascorbic acid in Pure C15™ using vitamin E and glutathione: 2 powerful ingredients that work as a rechargeable antioxidant network. Mimicking the body’s natural vitamin C stability system, they prevent the formula from losing its power, ensuring you get the best results that vitamin C can deliver. This innovative serum visibly brightens skin tone, smooths fine lines, firms tired skin and refines skin texture. The result is a radiant, smooth and noticeably more youthful-looking complexion. Formulated using pure vitamin C, Pure C15 is perfect for those who are experienced using vitamin C in their regime and are looking for a higher strength.