Cancer cells need oxygen and nutrients to grow and develop. As a tumor grows, it encourages new blood vessels to form from existing blood vessels, allowing increased blood flow and further growth of the cancer. Certain foods like garlic, berries, tomatoes, green tea and beans contain properties that can help the body's natural defenses reduce cancer risk or repair damaged cells. The document also provides information on local cancer services centers and lists additional lifestyle factors that can reduce cancer risk, such as limiting sun exposure, maintaining a healthy weight through exercise, eating nutritious foods, and knowing your family health history.