SkinCeuticals Serum 10 30mlSkinCeuticals Serum 10 30ml Skinceuticals Serum 10 is a lightweight serum that combines 10% L ascorbic acid (vitamin C) with ferulic acid, and resulting in a highly effective antioxidant shield that protects against free radical and environmental damage. It helps diminish and prevent visible signs of aging while illuminating the skin, resulting in a youthful and radiant appearance. This 10% formulation is ideal for sensitive skin types and conditions.