Phlorentin CFAdvanced Vitamin C Face Serum for Environmental Protection and Skin Radiance Shield your skin from environmental damage with Phloretin CF, a patented daytime vitamin C face serum infused with powerful antioxidants to protect against environmental stressors and reduce the appearance of fine lines and skin discoloration. (U. S. Patent No. 9,248,082) Phloretin CF combines a unique blend of 2% phloretin, 10% pure vitamin C (l ascorbic acid), and 0. 5%