Seoul Ceuticals CE Ferulic Serum. This Korean Skin Care, Vitamin C Serum contains 20% vitamin c with hyaluronic acid, ferulic acid, vitamin e ( d alpha tocopherol ) and citrus stem cells. This vit c serum is extremely effective for anti aging, anti wrinkle treatment and was modeled after the award winning, SkinCeuticals CE Ferulic Serum which retails at $160. Seoul Ceuticals, K beauty products are designed to work perfectly with any Korean skin care routine from Jordan Samuel, Glossier, Stratia Liquid Gold, Amore Pacific, Dr. Jart, Elizavecca, Etude House, Goodal, Innisfree, Laneige, Mizon, SONNPARK and TonyMoly. This serum comes with a our 100% satisfaction guarantee. If for any reason you're not satisfied, we ask that you contact us through support and we'll do whatever necessary to ensure your satisfaction.