I think if you only have one you should just enjoy it. There's so much else that raises the risk of cancer, and I hope Michael might touch on it in another article. The stuff we breathe in at home is worrying, and then all the chemicals that are sprayed on crops. In which case Linda, just have the bottle and enjoy life while you can! I'm joking of course! Take the big money-grabbing players out of our lives, and replace them with pleyers intent on doing good...what a wonderful worl that would be.