What is ferulic acid and why is it paired with Vitamin C?

Ferulic acid is a plant-based antioxidant that significantly boosts the stability and efficacy of vitamin C and vitamin E. Studies show that combining 15% L-ascorbic acid with 0.5% ferulic acid and 1% vitamin E doubles the photoprotection of vitamin C alone and extends shelf life considerably. This trio is considered the gold-standard antioxidant combination in evidence-based skincare.