can raising vitamin D levels prevent up to half of all breast cancers?

[Lani]

Researchers say that raising vitamin D levels may prevent up to half of all breast and two thirds of colorectal cancer cases in the United States.

" Based on the results of 2 separate studies, the investigators recommend a daily intake of 2000 IU of vitamin D3 and, when possible, moderate sun exposure."

http://www.medscape.com/viewarticle/552033