Many times the cause behind acne is deficiency of zinc. Zinc not only helps in adding brightness and color to your complexion, it also helps in controlling oil production in your skin. zinc soothes inflamed skin, speeds up healing, and regenerates skin cells. The mineral also help in inhibiting 5-alpha-reductase activity which is a cause behind acne. 5-alpha-reductase is an enzyme responsible for converting testosterone into another form that is highly active and promotes pimples. If you take 30mg of it daily, it can help in fighting acne. Raw pumpkin seeds are the best options. Taking just 1/4 cup of these seeds can supply you around 1/2 of your recommended dosage.