Hi , I have an acne prone skin,but at present my skin condition is normal . Can I use a vitamin C serum from market? If yes ,which would be a best vitamin c serum without any side-effects for skin type like me Recently I am using a moisturizer named dermadew aloe cream, melalumin cream as suggested by my dermatologist but acne spots are still there and so skin does not look soft and supple. Does vitamin C serum helps? Thanks