Pomegranate juice will prevent estrogen responsive breast cancer cells from growing. This phytochemical inhibits aromatase that is used to create estrogen, increasing your risk of breast cancer. . Pomegranate juice wont fend off cancer by itself, but studies suggest it may be a wonderful addition to the balanced, plantbased diet recommended by the American Institute of Cancer Research, says Collins. Men who have already had preliminary treatment for prostate cancer may benefit from a daily dose of pomegranate juice.