What question did this study set out to answer?

The study aimed to determine the effects of lutein, zeaxanthin, and anthocyanins on visual function in healthy children.

The effects of lutein, zeaxanthin and anthocyanins supplementation on visual function and vision protection in healthy school-aged children: a single-center prospective randomized controlled study

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Controlled trial shows that carotenoid supplementation improves visual function in healthy children, suggesting dietary benefits for eye health.

The study aimed to determine the effects of lutein, zeaxanthin, and anthocyanins on visual function in healthy children.
Prospective randomized controlled trial
Sixty-four school-aged children aged 6-10 were included
Participants received daily supplementation of lutein, zeaxanthin, and anthocyanins or a control
Visual function metrics were assessed at baseline, 1, 3, and 6 months
Macular pigment optical density significantly increased in the treatment group, especially at 6 months
Central and minimum foveal thickness levels were elevated over time in the treatment group
Axial length increased in both groups, but the treatment group's increase was less pronounced by 6 months
Contrast sensitivity function improved more in the treatment group at 3c/d spatial frequency compared to the control group
Visual fatigue symptoms were notably improved in the treatment group

Zhou et al. (2026) studied this question.

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Controlled trial shows that carotenoid supplementation improves visual function in healthy children, suggesting dietary benefits for eye health.