Zeaxanthin, a nutrient found in leafy greens, can boost immune cells’ ability to attack cancer. It may also make modern immunotherapy treatments more effective. Credit: Shutterstock Researchers at the University of Chicago have uncovered a surprising new role for zeaxanthin, a plant-based compound best known for supporting eye health. According to findings published in Cell Reports Medicine , this common carotenoid may also help the immune system fight cancer by enhancing the activity of key