Lutein works in two ways- it acts as a filter against the harmful blue light and combats the free radical in the eye as an anti-oxidant. Excessive exposure to blue light can lead to formation of free radicals which can harm the eyes. Lutein prevents these radicals from storing and from causing irreversible damage to the eyes.
Lutein can be found in food- vegetables and fruits in particular, although eggs are also good sources of Lutein. Other food sources include papaya, orange, kale, spinach, garden peas, zucchini, brussels sprouts, pistachio nuts, broccoli, corn, kiwifruit, turnip greens, romaine lettuce, collard greens etc.
Lutein can be available as a sublingual spray for old people with poor digestion. It can be found in fortified foods and as dietary supplements with positive effects at intake levels of 6–10 mg/day. As of now, the only known side effect of excess Lutein consumption is carotenodermia or the bronzing color of the skin.
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