goPure Vitamin C SerumI can't use Vitamin C on my face (more specifically my cheeks, the rest strangely is ok) because I have very sensitive skin that it irritates. So I got this actually to use on the backs of my hands to enhance the great results I am already seeing with the goPure Vitamin C cream. My hands had gotten very alligatory in the past year or so, as well as developing age spots. I am delighted to report that in a very short time, the Vitamin C duo has made a very noticeable improvement in smoothing my back-of-hand skin, plus I am sure it is not my imagination that the spots are lightening as well. I wish I had taken pictures before I started the routine so I could show a comparison!