SkinCeuticals Serum 10 Anti Aging for Sensitive Skin 30mlSkinceuticals Serum 10 is a beginner's antioxidant serum that combines 10% L ascorbic acid (vitamin C) with ferulic acid, resulting in a highly effective antioxidant shield that protects against free radicals 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 those with sensitive skin.