Soy is a rich source of plant estrogens that have been shown to inhibit hormones that promote prostate cancer. Vitamins A, D, and E are also under investigation for possible protection. A large 1998 trial of male smokers found that long-term daily use of 50 mg of vitamin E markedly decreased the incidence of, and associated mortality from prostate cancer. It had no protective effect for men who already had prostate cancer. A diet low in saturated fats and high in fiber, fresh fruits, and vegetables is desirable, in any case, for general good health.
Exercise is beneficial for general health and it temporarily lowers testosterone levels.
Studies are now indicating that even moderate exercise may help reduce the risk for prostate cancer. Larger studies are needed to confirm this association. Of concern, however, is a 1998 study reporting that finasteride offers no protection and, in fact, the men who were taking finasteride had a higher incidence of prostate cancer after one year than those not on the drug. Some researchers believe that Proscar may increase testosterone levels within the prostate gland, which could stimulate cancerous changes. All rights reserved.