This concentrated treatment serum combines 15% Ascorbic Acid, 1.5% Protech-cell Complex and 0.5% Ferulic Acid to support effective protection against free radicals produced by external attacks on the skin, such as UV sun rays, pollution, and stress. AOX Ferulic also protects the natural antioxidant system and barrier function of the skin while helping to prevent photo and chrono-ageing. Suitable for all skin types.