Vitamin C as a treatment for cancer is back in the news again.
I’m not surprised. This is one therapy favored by advocates of “alternative” medicine that keeps popping up periodically (seemingly every couple of years or so). This latest bit of news has turned up almost right on time after the last time there was a push for rehabilitating vitamin C as a cancer cure a couple of years ago. Back in the spring of 2006, there were two studies published (more on them later) which were touted by the “complementary and alternative medicine” (CAM) crowd as evidence that Linus Pauling was supposedly vindicated. A little less than two weeks ago, an animal study was published suggesting that high-dose intravenous vitamin C had antitumor activity in mouse models. A couple of weeks prior, there had also been published a phase I clinical trial that showed that megadoses of IV ascorbate were safe and well-tolerated in cancer patients if they were appropriately screened for renal disease. Given the latest studies of this particular modality against cancer, it seemed like an opportune time for me to examine this new evidence and ask the question: Has Linus Pauling been vindicated?
I’ll cut to the chase. The short answer is: Not really, with the qualification that it depends on what you mean by “vindicated.” The long answer follows.
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