An extensive review of studies related to diet and prostate cancer risk, published in The Journal of the American Osteopathic Association, revealed that consumption of higher amounts of plant-based foods may be associated with decreased prostate cancer risk, and consumption of higher amounts of dairy products may be associated with increased prostate cancer risk.  There does not appear to be a clear association between increased prostate cancer risk and increased consumption of other types of animal-based foods, including red, white, or processed meat, fish, and eggs.