Epidemiological data for soy consumption related to the protection from cancer induction are not restricted to women. Prostate cancer is also an estrogen-dependent tumour form, and as with breast cancer a protection from prostate cancer was attributed to soy consumption. Epidemiological data is available from more than 100,000 men, demonstrating either a protective effect of soy preparations and/or isoflavones, or at least no increased incidence rate of prostate cancer after exposure (Akaza et al. 2002; Allen et al. 2004; Heald et al. 2007; Hebert et al. 1998; Hedelin et al. 2006; Jacobsen et al. 1998; Kolonel et al. 2000; Kurahashi et al. 2007; Lee et al. 1998; Lee et al. 2003; Nagata 2000; Nomura et al. 2004; Ozasa et al. 2004; Severson et al. 1989; Sonoda et al. 2004; Strom et al. 1999; Sung et al. 1999; Villeneuve et al. 1999). In not a single study an increased risk was found under intake of isoflavones.
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Isoflavone Research Initiative
