by Viktoriya Zabigaylo and Orest Szczurko
For a long time, women have been advised that soy products may increase the risk or recurrence of cancer. The evidence for this was solely based on in-vitro studies using a rat model, and it is now known that soy isoflavone metabolism is very different in humans. Recent epidemiological research suggests that soy protein consumption is linked with a reduced risk of breast cancer recurrence, and even all-cause mortality in multiple cohort studies (1,2,3,4,5).