There is evidence from laboratory and clinical studies that the following substances can potentially reduce one’s risk of prostate cancer:

1. Soya products. These contain phytoestrogens which delay the growth of prostate cancer.
   
   
2. Green tea. Polyphenols in green tea can inhibit prostate cancer cells
   
   
3. Tomatoes have lycopene, a carotenoid that kills cancer cells.
   
   
4. Antioxidants such as selenium, vitamin E have been found in studies to reduce the risk of prostate cancer.
   
   
5. Vitamin D.
   
   
6. A reduced animal fat intake. Studies have shown that a diet with 26g of fat per day has an additional attributable risk of 13%, compared to 13g of fat per day.
   
   
7. Finasteride. This drug, an enzyme that blocks the conversion of testosterone to its more active compound, is under trial to prevent prostate cancer.