Now we have a new study from Germany showing that women with the highest vitamin D levels have a 55% reduced risk of breast cancer compared to those with the lowest levels. Another study showed that three years of supplementation with calcium and vitamin D correlated to a reduced risk of all cancers in women by up to 77%. However, the supplementation was 1,100 IU per day, not 400.
What can I say? I told you so.
 Chlebowski R, et al. Calcium Plus Vitamin D Supplementation and the Risk of Breast Cancer. JNCI Published online 11-11- 2008.
 Holick, M. et al. Boston University. "Effects Of Vitamin D And Skin's Physiology Examined." Science Daily 21 February 2008
 Abbas, S. et al. Plasma 25-hydroxyvitamin D and premenopausal breast cancer risk in a German case-control study. Int J Cancer 2009;124:250-5.
 Lappe, J. et al. Vitamin D and calcium supplementation reduces cancer risk: results of a randomized trial. Am J Clin Nutr 2007;85:1586–91.