title: I'm undergoing chemotherapy and my doctor recommended that I stop taking my usual vitamins.  Why?
mesh_terms: D000970:Antineoplastic Agents / Q000378:metabolism*; D000975:Antioxidants / Q000378:metabolism / Q000494:pharmacology*; D001205:Ascorbic Acid; D004347:Drug Interactions; D005609:Free Radicals / Q000378:metabolism; D006801:Humans; D011878:Radiotherapy; D014801:Vitamin A; D014810:Vitamin E; D014815:Vitamins / Q000378:metabolism / Q000494:pharmacology*
chemical_list: D000970:Antineoplastic Agents; D000975:Antioxidants; D005609:Free Radicals; D014815:Vitamins; D014801:Vitamin A; D014810:Vitamin E; D001205:Ascorbic Acid