Dietary antioxidants play a role in preventing age-related cataracts by preventing the oxidation of proteins and lipids within the lens. Spinach, kale, broccoli, and other leafy vegetables rich in the carotenoid lutein, reduce the risk of developing cataracts. In the Nurses' Health Study, women who ate spinach and other greens at least twice a week had an 18 percent lower risk of cataract surgery than women who consumed them less than once a month. In the Health Professionals' Study, men who ate broccoli more than twice a week had a 23 percent lower risk of cataract surgery than men who consumed broccoli less than once a month.
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