Prostate cancer is the 4th most common cancer among males. There are 400,000 new cases diagnoses per year and this type of cancer accounts for about 4% of all cancers.
Studies done in Uraguay, Italy, and Sweden all show the same thing: dairy, meat, and animal fat consumption increase the risks of prostate cancer, while increasing fruit, especially tomatoes, and Vitamin # and Selenium intake decrease the risks.
The connection between dairy and the cancer may be due to the way the calcium in the dairy disrupts tne Vitamin D balance, the increase in IGF-1 (insulin-like growth factor), or the effect of dairy on testosterone. Either way, the message is clear: decrease or eliminate your dairy consumption.
Changing protein sources from animal to plant types have a beneficial effect on IGF-1 levels. This is good news for diabetics. Although we have been conditioned to think that diabetics need lots of animal protein, they can be assured that they will be getting enough protein from plant sources and cleaning up their blood risk factors for the disease. I covered concept in my "Balancing pH" class.
Isoflavones in soymilk have been shown to decrease cancer cell growth in humans as well.
One study in Greece showed that by increasing olive oil and tomato consumption reduced the risk of prostate cancer by as much as 41%!
In my observation, you can't go wrong with increasing fruits and veggies while decreasing the amounts of animal products in your diet. There is ALWAYS a benefit!
sources: http://www.pcrm.org/, and Dr. Ted Morter's "The Book of Nutrition", "Correlative Urinalysis", and "Nutrition Homestudy" tape series.