[Rich66]

And then there's this:

Studies target link between prostate cancer, excess protein

Dr. Luigi Fontana is the chief investigator on the study, "Does Protein Restriction Inhibit Prostate Cancer Growth?"
He's also co-director of the CALERIE Study, a national, federally funded look at the health effects of calorie restriction — eating 20 percent to 30 percent fewer calories.
While working on the CALERIE Study, Fontana said researchers examined men who had reduced their calorie intake quite substantially. They found that protein intake was more important than calorie intake in regulating the circulating levels of a key hormone called insulin-like growth factor 1, or IGF-1.The hormone has been linked to the risk of developing prostate, breast and colon cancer.
The normal job of the hormone is to help cells grow. It's one of the reasons protein helps rebuild muscles.
But too much protein produced too much of the hormone, Fontana said. That extra hormone potentially helps prostate cancer cells grow, as well.

http://www.stltoday.com/lifestyles/h...033ee21e3.html