Bionnex Vitamin C 15% + Ferulic Acid 0.5% – Vitamin C SerumBIONNEX Vitamin C 15% + Ferulic Acid 0. 5% + Burdock Serum Skin Brightening & Anti aging This advanced serum combines Vitamin C 15%, Ferulic Acid 0. 5%, and Burdock, designed to brighten skin, reduce hyperpigmentation, and combat the visible signs of aging. Vitamin C 15%: A powerful antioxidant that protects skin from oxidative damage, brightens skin, and helps even out skin tone. Vitamin C also supports collagen production and reduces the appearance