lutein

Carrots aren’t the only food that supports healthy eyes. A recent study from Tufts University has found that eating just two handfuls of pistachios a day may help preserve vision, particularly by protecting against age-related macular degeneration (AMD), the leading cause of vision loss in older adults.

Dr. Tammy Scott, the study’s lead author, explains that pistachios are rich in lutein—a plant pigment and antioxidant that helps shield the retina from damage caused by blue and ultraviolet light. “Lutein is like natural sunglasses for your eyes,” she said. The study, supported by the American Pistachio Growers, found that participants who consumed about two ounces of unsalted pistachios daily experienced a measurable increase in macular pigment optical density (MPOD), an indicator of eye health, in just six weeks.

AMD affects nearly 20 million Americans and gradually deteriorates central vision. While dry AMD progresses slowly due to the thinning of the macula and protein buildup, wet AMD is more aggressive, involving abnormal blood vessel growth. Though there’s no cure, early dietary interventions may slow the disease’s progression.

Pistachios are particularly effective because their natural fat content enhances lutein absorption, making them an efficient dietary source. Two daily handfuls can double the average American’s lutein intake to around 1.6 mg.

The benefits extend beyond vision. Lutein is also found in the brain, where it may reduce oxidative stress and inflammation—factors linked to heart disease, diabetes, and cognitive decline. Pistachios also offer fiber, protein, heart-healthy fats, and nutrients like vitamin B6, potassium, and iron.

Incorporating pistachios into your routine could be a simple, natural way to support your eyes, overall health, and aging.