The C tetra Range Medik8 INT Medik8 Vitamin C C Tetra Lipid Vitamin C Radiance Serum SweetCare United States The Medik8 C Tetra Serum delivers powerful antioxidant protection against environmental stressors while minimising the look of uneven skin tone for a visibly brighter finish. Infused with a stable form of vitamin C, Bright skin starts with brilliant science. Our vitamin C serums are expertly formulated to deliver powerful antioxidant protection while supporting a visibly smoother, more radiant complexion. Pair with Medik8 Radiance Wrapped Kit Dermstore C Tetra Antioxidant Vitamin C Serum Medik8