Vitamin C Serum For Face - 10% Vitamin C + 0.5 % Ferulic Acid The peculiar combination of Vitamin C and Ferulic acid function well together towards limiting the expression of tyrosinase which will provide the brightening effect. This Vitamin C serum for face is specifically designed for all skin types, including oily, dry, combination and sensitive skin. Ferulic acid and Vitamin C serum for face contains anti-inflammatory properties which clear pigmentation and PIH and are also essential for collagen biosynthesis.