I have heard that tomato sauces and tomato paste are good preventions for prostate problems but, once developed, there are no doubt other suggestions. I would check out Bastyr University (bastyr.edu) and see what articles they have on the subject. It is a school that trains nutritionists in Seattle. You can peruse their site and also maybe find a person to consult. I recently invited a nutritionist connected with Bastyr to my parent- infant class, and was impressed with her work, her research, and the breadth of her knowledge. She also had trained physicians in nutrition at the University of Washington--a subject most doctors don't get much exposure to. It is quite a radical-type place though--they really think carefully about food and health and the connection between the two.