Saffron contains antioxidants, which improves the immune system. Its golden color comes from carotenoids such as lycopenes and beta-cartonenes that help to improve eyes. Saffron also contains a carotenoid called crocetin that helps prevent the growth of cancer cells. The Institute for Traditional Medicine says saffron can also improve circulation and relieve depression symptoms. It can alleviate pains associated with menstruation as well.