you should also use substances derived from vitamin A like retin-a or tazarotene, to reduce inflammation of the skin and to unplug pores. Retin-A can cause skin reddening at first but this is quite normal as the skin's blood supply is improved and younger looking skin begins to appear presenting a youthful complexion. Using a product that includes zinc will also help the vitamin a function better. you can find more information at http://www.nutrition4yourskin.co.uk/