Other options you could discuss with your derm include laser cautery,podofilox, imiquimod
, and others. (In theory, imiquimod's immunologic mechanism of action
might be preferable to the others, but I stress "in theory". In fact, it's probably no more effective than other methods.)
As for the alternative therapies you mention, there is absolutely no scientific evidence that vitamins, zinc, etc have any effect (and really no theoretical biological reationale why they should).