Natural vitamin c serum for facevitamin c serum with powerful antioxidants help to hydrate the dull skin, minimizer pores, reduce lines and sun spots, brighten your skin tonewhile helping to increase collagen synthesis and improve clarity, texture and overall appearance. Can be used for face and neck. Great gift for ladies and men. Can we take more vitamin c supplements by eating oranges? oral vc is a natural macromolecule that it is difficult to apply to the bottom layer of the skin, so we must obtain small molecules vc from theexternal environment to resist oxdiation and protect the skin.