BEYOND GLOW Brighten Clinically tested to revitalize skin in 2 weeks Beyond Glow Vitamin C 6% + Ferulic Acid Serum Clinically tested to improve skin radiance in 3 days. Vitamin C visibly improves radiance for glowing skin. Ferulic acid, a powerful antioxidant, helps protect skin from environmental stressors. 1 fl. oz.