PCA Skin Vitamin C&E Advanced Antioxidant Treatment promotes a bright, youthful appearance. This highly-advanced formula is packed with antioxidants and Vitamins C & E to diminish dark spots, soothe irritated skin and promote a more youthful appearance. Formulated with 20% L-ascorbic acid, the most stable form of Vitamin C, and 5% Tocopherol (Vitamin E), this treatment effectively fights dullness, discoloration, and fine lines.