Vitamin C Serum acts as a hero anti-oxidant that fights the effect of free radical damage and sun exposure, also repairing your skin and protecting it from pre-mature aging.Effective anti-oxidant formula that brightens the skin. Make sure that this serum is not used with Niacinamide. After the application of Conatural’s Vitamin C Serum, a tingling sensation may be experienced during the first week of using the serum until the skin develops tolerance. If the tingling sensation is too strong, then mix the serum with another cream and apply to face.Conatural face serums are highly effective for targeted treatments and can be used along with other Super Active Serums, where each serum treats a separate concern.Our Vitamin C serum for face is formulated with 3-0-ethylated Ascorbic Acid, which is the stabilized form of Vitamin C. We use the maximum dose permissible under dermal limits for this type of Vitamin C.