Zinc supplements work wonders. Simply take 25 milligrams twice daily to achieve better results than many prescription options. Zinc is sold at pharmacies and most grocery stores in the aisle with vitamin and mineral supplements.
There are also many herbs that are known to clear up acne, some of which are; oregon grape root applied as a cream, tea tree oil applied to the skin in cream or lotion form and oregano and basil oil, either applied to the skin or taken orally.
When using any new product, be it prescription medication or over the counter topical acne treatments, be sure to watch out for reactions and skin sensitivity. Always check with your dermatologist before commencing any herbal treatments and disclose any medicine you are already taking.