[edit] Phytoestrogen in women
A 2001 study determined that women with current or past breast cancer should be aware of the risks of potential tumor growth when taking soy products.<ref>Ann Pharmacother. 2001 Sep;35(9):1118-21.Effects of soy phytoestrogens genistein and daidzein on breast cancer growth. de Lemos ML. Provincial Systemic Therapy Program, British Columbia Cancer Agency, Vancouver, Canada.</ref>
A 2006 study concluded that not enough information is available; the impact of isoflavones on breast tissue needs to be evaluated at the cellular level in women at high risk for breast cancer.<ref>J Natl Cancer Inst. 2006 Sep 20;98(18):1275-84.Addressing the soy and breast cancer relationship: review, commentary, and workshop proceedings. Messina M, McCaskill-Stevens W, Lampe JW. Department of Nutrition, School of Public Health, Loma Linda University, Loma Linda, CA, USA</ref>
