Vitamin D Cuts Risks of Cancers by 77%
A landmark new study is raising the tantalizing spectre that a simple and cheap vitamin supplement may offer a highly effective way of preventing cancer.
The research, published in the online edition of the American Journal of Clinical Nutrition, finds that a combination of vitamin D3 and calcium has a substantially marked effect on reducing cancer incidence.
The four-year study out of Creighton University in Nebraska found that women who regularly took vitamin D3 had a 60 per cent reduction in cancer infections compared to a group taking placebos.
The study followed 1,179 healthy, women 55 years and older from rural eastern Nebraska between 2000 and 2005. Participants were randomly assigned to receive 1400-1500 mg of calcium alone, or supplemental calcium plus 1,100 IU vitamin D3, or placebo. The researchers studied only vitamin D3, which comes from animal sources and seems to be more active than vitamin D2, which is derived from plant sources.
Among the 288 women taking placebo, 20 developed breast, colon, lung or another form of cancer. Among the 445 women taking just calcium, 17 developed cancer. But among the largest group -- the 446 women taking vitamin D daily -- just 13 developed cancer.
While U.S. cancer groups like the American Cancer Society stubbornly refuse to acknowledge the benefits of vitamin D supplements in cancer prevention, the Canadian Cancer Society is launching a program to make sure every Canadian citizen receives a level of vitamin D sufficient to prevent most cancers, including breast cancer.
