More vitamin D could mean fewer cancers

More vitamin D could mean fewer cancers: study Reuters/Yahoo! 2007.09.04 "Thousands of cases of breast and colon cancers might be averted each year if people in colder climates raised their vitamin D levels...rates of breast, colon and ovarian cancer, for example, are lower in sunnier regions of the world than in Northern climates where cold winters limit people's sun exposure...lab experiments showing that vitamin D helps prevent cancer cells from growing and spreading, as well as some clinical trials in which people given high doses of vitamin D showed lower cancer risks... The protective effect against colon cancer seemed to begin when blood levels of vitamin D reached 22 nanograms per milliliter (ng/mL); for breast cancer, that number was 32 ng/mL. The average late-winter vitamin D level among Americans is 15 to 18 ng/mL, according to the researchers...They argue that, based on their data, if Americans were able to maintain a vitamin D level of at least 55 ng/mL, 60,000 cases of colon cancer and 85,000 cases of breast cancer could be prevented every year. Worldwide, those figures could be 250,000 and 350,000, respectively..."This could be best achieved with a combination of diet, supplements and short intervals -- 10 or 15 minutes a day -- in the sun," lead study author Dr. Cedric F.Garland..."

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