Flax Lignans can bind to male hormones

It appears lignans can bind to males hormones and lower incidence of prostate cancer:

“Flaxseed is high in lignans, fiber-related compounds that can bind to male hormones and increase their elimination through the digestive system. Lignans also act as plant-derived estrogens, and this combination of hormonal effects might inhibit prostate cancer formation and growth. In addition, flaxseed is a rich source of omega-3 fatty acids, which have been linked in some studies to a lower incidence of prostate cancer.”

American Cancer Society: http://www.cancer.org/docroot/NWS/content/NWS_2_1x_Flaxseed_and_Low-Fat_Diet_May_Prevent_Prostate_Cancer.asp