Prostatic fluid concentrations of isoflavonoids in soy consumers are sufficient to inhibit growth of benign and malignant prostatic epithelial cells in vitro.
Hedlund TE, van Bokhoven A, Johannes WU, Nordeen SK, Ogden LG. Prostatic fluid concentrations of isoflavonoids in soy consumers are sufficient to inhibit growth of benign and malignant prostatic epithelial cells in vitro. Prostate. 2006 Apr 01; 66(5):557-66.