in today's nytimes...

no one's recommending anything yet but...interesting...

"Among the other studies to be presented at the conference is one that found that patients with newly diagnosed breast cancer who had low levels of vitamin D had a much greater probability of dying or experiencing a spread of the cancer than patients with sufficient levels of the vitamin.

But the research was not designed to establish that vitamin D deficiency was the cause of the worse prognosis. So Dr. Pamela J. Goodwin of the University of Toronto, an author of the study, said it would be premature to recommend that breast cancer patients take megadoses of vitamin D.

Dr. Julie R. Gralow, a breast cancer specialist at the University of Washington and the Fred Hutchinson Cancer Research Center in Seattle, concurred.

“We have no idea whether correcting a vitamin D deficiency will alter these outcomes,” said Dr. Gralow, chairwoman of the oncology society’s communications committee.

The study followed 512 women treated for early-stage breast cancer in Toronto from 1989 to 1995, and tracked them through 2007. Those with vitamin D levels so low at the time of diagnosis as to be deemed deficient had nearly twice the risk of the cancer’s recurring or spreading as those with sufficient levels, and a 73 percent greater risk of dying. Only 24 percent of the women had sufficient levels at the time of diagnosis."

http://www.nytimes.com/2008/05/16/health/research/16cancer.html?ref=us