The best natural way to treat scars is to apply Vitamin E directly on the scar itself. This will help in producing more collagen (protein) and when new collagen is produced, new cell growth is accelerated to fade away your scars. Taking Vitamin E orally does not help so much because very little of the goodness is distributed to the skin and face. Go for serum or creams which shows very high concentration of natural Vitamin E as the ingredient. Make sure they are no chemical substitute which may cause unwanted side effects.
One such product you may try is Natur E scar serum (which i found to be a wonderful product that works). It is a natural product containing 28000 iu of Vitamin E, hence safe of side effects - yet it works. You can find out more on http://www.scarremovaltreatment.net.