Home Beauty Other Brands Can Now Legally Try to Dupe SkinCeuticals’ $182 Vitamin C Serum Beauty Other Brands Can Now Legally Try to Dupe SkinCeuticals’ $182 Vitamin C Serum By - April 5, 2025 2 0 FacebookTwitterPinterestWhatsApp The patent on the beloved C E Ferulic has expired. Here’s what that means for your skin-care routine.