People with more of this in their blood did better on intelligence tests.
Eating leafy greens helps preserve intelligence over the lifetime, research finds. Leafy greens and other foods contain lutein, a plant pigment that protects the brain from aging. People with more lutein in their blood did better on intelligence tests, the study found. Lutein collects in the cell membranes of the brain, playing a ‘neuroprotective’ role. Foods that contain high levels of lutein include leafy green vegetables like kale and spinach as well as broccoli, cauliflower, and cabbage.
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