Study: Leafy Green Veggies Protect Eyes

In a recent study published in the December issue of the Journal of Nutrition, researchers examined the effects of lutein and zeaxanthin on samples of human eye lens cells in the laboratory. They also compared the effects of these antioxidants on the cells to the effects of another antioxidant thought to improve eye health, vitamin E. Researchers treated the cells with various concentrations of the antioxidants and then exposed them to ultraviolet radiation. "The dose of UVB radiation we used on the cells is about the same amount a person receives when they get a mild tan," says Bomser. Adding lutein and zeaxanthin to the cells reduced signs of ultraviolet damage by 50%-60%. Vitamin E reduced the same signs of damage by 25%-32%. "Lutein and zeaxanthin accumulate in the retina and in the lens of the eye, but we're not sure how they reach the eye in the first place," says Bomser. "They travel through the bloodstream, but the lens doesn't have a blood supply." This study provides new evidence that these antioxidants, which are found in plants such as spinach, kale, and collard greens, can indeed help prevent cataracts by protecting the eyes from the damaging effects of ultraviolet sunlight. Source: Chitchiumroonchokchai, C. Journal of Nutrition, December 2004; vol 134: pp 3225-3232