Dairy Foods' Calcium Protective against Breast Cancer

When French researchers analyzed the dietary intakes of 3,627 women
using five 24-hour records completed over the course of 18 months,
those with the highest average dairy intake had a 45% lower risk of
developing breast cancer than women with the lowest average intake.
When only pre-menopausal women were considered, benefits were even
greater; those with the highest average dairy intake had a 65%
reduction in breast cancer risk.

Analysis indicates the calcium provided by dairy foods is the reason
why. Increasing calcium intake was associated with a 50% reduction in
breast cancer risk for the whole population, and a 74% reduction for
pre-menopausal women.

Ann Nutr Metab. 2007;51(2):139-45. Epub 2007 May 29.