I picked up an old edition of Reader's Digest - September 2009, page 79. The article is entitled "Perils of a Good Thing"
   To summarize: "Almost 60 percent of women reach for antioxidants, such as vitamins C or E, when notified of breast cancer .  . they may be doing themselves more harm than good.
  "Antioxidants sop up free radicals in the body, but that may interfere with . .  radiation and some forms of chemotherapy, which generate free radicals to damage cancer cells.
  "We don't know the effects at this point."  So, we are now warned.