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Researchers have agreed that adequate levels of Vitamin D are critical for optimal body functioning. Exciting ground breaking research is now indicating that proper amounts might actually prevent cancer and help those already suffering. Though it might seem to good to be true, studies are indicating that getting enough proper sun exposure or ingesting a supplement may be a serious ally in the fight against cancer. Dr. Louise Parker, respected epidemiologist and member of the Dalhousie Cancer  Research Program, says that, “As time has gone by, Vitamin D has raised its head as a sort of ambrosia for cancers.”

Of course, everyone is interested in finding out exactly how much Vitamin D is the right amount to prevent cancer. A staunch supporter of the benefits of Vitamin D, Dr. John Jacob Cannell, Executive Director of the Vitamin D Council, says that “studies are reporting most of us are vitamin D deficient and those deficiencies may well be causing numerous illnesses, especially cancer.” Like any other supplement, Vitamin D should not be ingested excessively. However, for those producing Vitamin D through sun exposure, there is little chance of Vitamin D toxicity.  As soon as your body absorbs enough, reserves start degrading. The body is thus able to balance itself. Vitamin D can be derived from a healthy diet including certain fishes, eggs, and mushrooms. Or, it can be orally ingested in supplement form. Though the body responds differently to this oral form, the risk of toxicity is very low.

Research is not yet complete, but studies indicate that Vitamin D is most effective at preventing breast, colon, and prostate cancers. Of course, lifestyle and other elements factor into the likelihood equation. But, simply maintaining a healthy level of Vitamin D is being shown to be a critical factor in personal defense against cancer.  You can determine whether you have the right amount through a simple test called the 25-hydroxyvitamin D test or a 25(OH)D. Current research indicates that both children and adults should maintain a level above 50 ng/ml (125 nmol/L) all year.  

The right amount of Vitamin D will vary a bit for each individual, but "on the average, 1,000 units a day is safe and is probably effective in reducing the risk of colon cancer, and maybe other cancers as well," says Dr. Parker. She follows her own advice to prevent cancer, saying, "I take 1,000 units of Vitamin D – one day on and one day off." Living in Canada, where winter sun exposure is minimal, a supplement is especially important for ensuring she maintains an adequate level of Vitamin D. Though nothing is guaranteed, all current research indicates that a first, easy step you can take to prevent cancer is to get enough Vitamin D.