Beta carotene can be found in dark green or orange vegetables like spinach or carrots. You can also get it from apricots and mangoes. Vitamin A can also be sourced from liver and eggs. It has also been shown that polyunsaturated fats can help to control acne. You can source these from nuts, seed oils and oily fish.
Vitamin E is also useful in helping to maintain and repair the skin.
Of course it is also recommended that you cut down on your intake of fatty foods in order to control your acne. Try to gradually replace fatty and fried foods with whole grains, vegetables and fresh fruits. Wean yourself off of those high sugar soft drinks and try to acquire a taste for water. Also try to cut out on chocolates and sweets as well as highly salted snacks. Readjusting your eating habits will take a great deal of discipline and stickability.