QUOTE AUTHOR GOES HERESoy... great source of protein just be careful not to eat to much. This is because your body converts certain components of soy into a variation of estorgen which can undermine your hormone levels and other chemical aspects of your body.
This is no longer a big deal in the research. Soy is fine.
Hamilton-Reeves JM, Vazquez G, Duval SJ, Phipps WR, Kurzer MS, Messina MJ. (2010). "Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis". Fertil Steril. 94 (3): 997–1007.
Heald CL, Ritchie MR, Bolton-Smith C, Morton MS, Alexander FE (2007). "Phyto-oestrogens and risk of prostate cancer in Scottish men". Br. J. Nutr. 98 (2): 388–96.
Messina M (May 2010). "Soybean isoflavone exposure does not have feminizing effects on men: a critical examination of the clinical evidence". Fertil. Steril. 93 (7): 2095–104.
2009 Lin Yan, and Edward L Spitznagel n "Soy consumption and prostate cancer risk in men: a revisit of a meta-analysis1,2,3,4" American Society for Nutrition.