... one of the most powerful natural antioxidants, which, especially when tomatoes are cooked, has been found to help prevent prostate cancer. ... phosphorus, iron, adenine, choline, trigenelline and beta-carotene. Tomatoes are available fresh, and in a variety of canned products, such ... , tomato sauce, tomato puree, and diced tomatoes. Tomatoes are often juiced and can be concentrated to produce tomato paste ...