Another top ingredient on our antioxidant honour roll is ferulic acid, a powerful active that neutralises free radical damage which can accelerate skin ageing. While it is known for reducing inflammation along with the formation of fine lines and wrinkles, its standout quality is diminishing the visibility of hyperpigmentation like brown spots along with redness. Plus, when paired with vitamins C and E, it boosts their effectiveness, too – think of Thanos with the power of all the Infinity Stones, but in your little bottle of serum. Pro tip: Avoid using ferulic acid with exfoliating acids like glycolic and lactic acids as they can alter its pH and reduce its effectiveness.