If women have breast cancer and are being treated with tamoxifen: Animal studies suggest that the active compound may antagonize the effects of tamoxifen on estrogen-dependent breast cancer cells. Clinical relevance has yet to be determined. If women have breast cancer and are being treated with Aromatase inhibitors: Geinstein is an isoflavone found in soy change the breast cancer- aromatase expression and activity, in a test tube, suggesting that soy-based supplements may affect the efficacy of aromatase inhibitors used in breast cancer treatment. Email us at email@example.com and check out our home website www.icrmc.org at the Institute of Cancer Restorative Medicine to tell us about any dietary supplements you’re taking, such as herbs, vitamins, minerals, and natural or home remedies. We will be available to help you out. Remember that becoming healthy is a slow process. Remember that if it doesn’t challenge you, it won’t change you.