http://www.hyscience.com/archives/2006/04/sunshine_and_vi.php A 40-year review of research has found that a daily dose of vitamin D could cut the risk of cancers of the breast, colon and ovary by up to a half. en-us http://www.newhopeblog.com/archives/2006/04/sunshine_and_vi.php A 40-year review of research has found that a daily dose of vitamin D could cut the risk of cancers of the breast, colon and ovary by up to a half.