Some studies have shown that a high-fat diet can stimulate prostate cancer cell growth; in particular, beef and fatty foods are predisposing factors for prostate cancer. Conversely, a diet rich in vegetables and low in fat can reduce the incidence of prostate cancer. Such “healthy” foods include soy products (tofu and soy milk), tomatoes, green tea, red grapes, strawberries, blueberries, peas, watermelon, garlic, and citrus. Soy products contain phytoestrogens, which are analogs of female sex hormones. Phytoestrogens in the normal diet may reduce the risk of prostate cancer. Green tea contains antioxidants, the latter of which can stop the excess of cells to cancer cells and reduce the risk of cancer. Vitamin E is a free radical scavenger, which may reduce the risk of prostate cancer. However, people with bleeding disorders and anemia should consult a medical professional if they need to take vitamin E. Overeating may also increase the risk of prostate cancer. Vitamin D deficiency can also increase the risk of prostate cancer. Foods rich in fructose (a component of sucrose) may reduce the risk of prostate cancer. Selenium may also reduce the risk of prostate cancer. Lycopene (a carotenoid) may also reduce the risk of prostate cancer. Lycopene is found in high levels in tomatoes and is only effective when cooked (e.g., tomato paste, not tomato juice). There are many studies underway both nationally and internationally on diet and the risk of prostate cancer.