There is no vitamin that will successfully improve acne
or any scars.
One important factor-get your acne under control. Find a dermatologist to tackle that with you. Most treatment to improve the appearance of acne scars use special technology to remodel the skin. The device I use to treat acne scars is called ematrix--see for info: http://www.Smacboca.Com/e-matrix-sublative-rejuvenation.Html.