Sorry David, I couldn't get all links to work. I did find a study comparing twins. It concluded that environment (including diet) was generally more important than genetics in cancer. [PC did have significant genetic risk.J
Lichtenstein, P., et al, “Environmental and Heritable Factors in the Causation of Cancer-Analyses of Cohorts of Twins from Sweden, Denmark, and Finland,” New England Journal of Medicine 343, #2 (2000)
I also suspect that Japanese people who come to USA adopt a more Western diet. I have seen Japanese people eating at KFC.
There was a study of the risk of a high-meat diet that found some significant risk for some cancers:
Key, T.J., “Cancer Incidence in Vegetarians”, British Journal of Cancer
A lot of studies out there were not for prostate cancer, specifically.
I'm not a vegetarian myself. I do take some supplements based on studies I have read.
Post Edited (robertcool) : 5/8/2011 1:39:38 PM (GMT-6)