Combining Glutathione and Vitamin C: How They Work Is it safe to mix glutathione with vitamin C (ascorbic acid) in an intravenous (IV) infusion? From the Foxtale Lab, straight to your glow oven! We've mixed Vitamin C, folded in Glutathione, stirred soothing agents, and perfected the texture, all to serve you a serum that brightens in 8 Glutathione and Vitamin C: Better Together? Performance Lab Glutathione And Vitamin C Therapy: Your Skin Favourite Combo