There is increasing evidence that soy has a protective effect on non-small cell lung cancer (NSCLC) cases with epidermal growth factor receptor (EGFR) mutations and breast, ovarian and prostate cancers (Shu et al., 2001; Lee et al., 2003; Zhang et al., 2004; Matsuo et al., 2008; Mishra et al., 2011). Here, EGFR is linked to prostate carcinoma.