Association Between Soy Isoflavone Intake and Breast Cancer Risk for Pre- And Post-Menopausal Women: A Meta-Analysis of Epidemiological Studies

Habitual intake of isoflavones from soy foods may help thwart the development of cancer cells in the breast.

This study systematically reviewed data from previous studies that focused on the association between dietary exposure to isoflavones and breast cancer risk. Researchers compiled data obtained from 35 studies. 

Researchers discovered that avid consumption of isoflavones from soy foods significantly slashed the risk of breast cancer in both premenopausal and postmenopausal women. This protective association was observed to be much stronger in Asian females than in Western women. The findings of this study confirm that high dietary ingestion of soy isoflavones may reduce a woman's susceptibility to breast cancer.