passion fruit (with peel), papaya or mango chunks

Make this smoothie with passion fruit (shown), papaya, mango'or all of the above. Why? Researchers in the United States, New Zealand and Iran found that eating an extract of passion fruit peel reduced pain and stiffness in the knee joints of patients suffering from osteoarthritis. As for papaya, its high levels of beta-carotene can help reduce flu symptoms, and the carotenoids in mango may lower the risk for breast cancer.