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Lutein and zeaxanthin may reduce stress

Recent studies have found the antioxidant carotenoids in the eye play a role in cognition as well. In this study, 59 healthy people, age 18 to 25, took a placebo or a combination of lutein, zeaxanthin, and meso-zeaxanthin, at a combined dose of 13 mg or 27 mg total carotenoids per day.

Doctors measured changes in levels of carotenoids in the macula of the eye, gave participants psychological stress and anxiety tests, and measured levels of cortisol, the fight-or-flight hormone released by the adrenal glands.

After six and 12 months, while the placebo group had not improved, both low and high-dose carotenoid groups had less psychological stress, better emotional and physical health, and lower cortisol levels. As levels of carotenoid pigment in the eye increased, psychological stress scores improved.

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