Lutein is a xanthophyll and one of 600 known naturally occurringcarotenoids. Lutein is synthesized only by plants and like otherxanthophylls is found in high quantities in green leafy vegetables such asspinach, kale and yellow carrots. In green plants, xanthophylls act tomodulate light energy and serve as non-photochemical quenching agentsto deal with triplet chlorophyll, which is overproduced at very high lightlevels, during photosynthesis. See xanthophyll cycle for this topic.
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