Lutein is an antioxidant, belonging to the carotenoid family. Lutein is found in the retinas of your eyes and is necessary for good vision. Lutein plays a significant role in prevention or slowing of eye disease progression. Lutein may also help to prevent or slow down the thickening of arteries that is called atherosclerosis, which is a major risk for cardiovascular disease.

Lutein and Cataract: The exact mechanism of how lutein prevents cataracts is still unknown. A few large studies revealed that people consumed a high quantity of lutein have a 20 - 50% lower risk of getting a cataract than people who consumed the least lutein.

Lutein and Macular Degeneration: Lutein is highly concentrated in the macula, a small area of the retina responsible for central vision, and high visual acuity. It is also thought that lutein filters blue wavelengths of light from the visible-light spectrum. Blue light, in both indoor lighting and sunlight, is believed to induce oxidative stress and possible free-radical damage in human organs exposed to light such as the eyes.

People with concerns over vision problems might wish to add more lutein containing foods to their diets. Anyone who has an elevated risk of cardiovascular disease may wish to add lutein.