Beauty
Ferulic Acid
Definition
A plant-based antioxidant that stabilises and enhances the efficacy of Vitamins C and E when combined in a serum formulation. At 0.5%, it roughly doubles the antioxidant activity of Vitamin C alone.
Why it matters for dupe shopping
The C+E+Ferulic combination is the defining formulation of the SkinCeuticals category. Dupes that include all three actives at correct concentrations offer near-identical antioxidant protection at a fraction of the price.