Research data indicate that lutein and zeaxanthin intake can alleviate symptoms of different eye pathologies. Within the retina, lutein and zeaxanthin are concentrated in the macula, with as much as 25% of their total retinal content found in the outer segments of the rod photoreceptor neurons. Lutein and zeaxanthin are recommended at least as an appropriate cautionary measure, especially for patients with age-related macular degeneration, retinitis pigmentosa, cataracts and with low dietary intake of these carotenoids.
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Rothermel et al. (2015) studied this question.
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