Medik8 c tetra is one powerful antioxidant serum, there protects skin meet damage caused of free radicals past, the laws environmental pollution. Serum contains one high concentration of vitamin c, as worker on to inform past, the laws smooth skintone, while with to what reduces appearance of fine lines past, the laws wrinkles. Application: apply 4 drops of c tetra on cleaned skin about morning, before you user your usual moisturizing cream past, the laws sunscreen. Lots carefully serum in in skin, avoid eye area.