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. 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.