question: I user epishine vitamin c 15% serum, I applied it overnight. It made my skin dry dull and dark. When I apply Vitamin E oil or Vitamin E cream over night, my face will have glow.My Dermatologist recommended \"epishine vitamin c 15% serum\" for the dark patches on my face, which is caused by sun burnt.Please recommend what to use, My skin is very sensitive for sun and dust.