Discover the secret to radiant skin with C Tetra Luxe, our Vitamin C serum that visibly firms and brightens your complexion. Curious for more? Swipe for a glimpse of our other 5 star serums Not all Vitamin C serums are created equal Let's talk about two powerful options from Medik8: C Tetra and C Tetra Advanced. C Tetra is the perfect entry level Vitamin C serum, formulated with Medik8 C Tetra Serum 30 ml C Tetra Antioxidant Vitamin C Serum Medik8 Medik8 Vitamin C C Tetra Eye Lipid Vitamin C Radiance Serum SweetCare United States