At an April 2006 cancer conference, evidence was presented that the
risk of breast cancer was reduced by 50% when vitamin D in the blood was 52
nanograms per milliliter, which equals to no less than 1000 international units (IU)
of vitamin D every day whether in the diet or in supplements. The average person
only gets 310 IU a day. (Evidence of Need for Increasing Dietary Vitamin D in Food.
Abstract 4008 - AACR Conference.) It is believe that part of the protective role Vitamin D plays is through its ablility to inhibit the growth of breast cancer cells as well as blocking excessive blood vessel formation around the tumor.
