What does lutein mean?

Definitions for lutein
ˈlu ti ɪnlutein

This dictionary definitions page includes all the possible meanings, example usage and translations of the word lutein.

Princeton's WordNet

  1. xanthophyll, xanthophyl, luteinnoun

    yellow carotenoid pigments in plants and animal fats and egg yolks

Wiktionary

  1. luteinnoun

    A yellow carotenoid pigment, widely distributed in both plants and animals.

Wikipedia

  1. Lutein

    Lutein (; from Latin luteus meaning "yellow") is a xanthophyll and one of 600 known naturally occurring carotenoids. Lutein is synthesized only by plants, and like other xanthophylls is found in high quantities in green leafy vegetables such as spinach, kale and yellow carrots. In green plants, xanthophylls act to modulate light energy and serve as non-photochemical quenching agents to deal with triplet chlorophyll (an excited form of chlorophyll), which is overproduced at very high light levels, during photosynthesis. See xanthophyll cycle for this topic. Animals obtain lutein by ingesting plants. In the human retina, lutein is absorbed from blood specifically into the macula lutea, although its precise role in the body is unknown. Lutein is also found in egg yolks and animal fats. Lutein is isomeric with zeaxanthin, differing only in the placement of one double bond. Lutein and zeaxanthin can be interconverted in the body through an intermediate called meso-zeaxanthin. The principal natural stereoisomer of lutein is (3R,3′R,6′R)-beta,epsilon-carotene-3,3′-diol. Lutein is a lipophilic molecule and is generally insoluble in water. The presence of the long chromophore of conjugated double bonds (polyene chain) provides the distinctive light-absorbing properties. The polyene chain is susceptible to oxidative degradation by light or heat and is chemically unstable in acids. Lutein is present in plants as fatty-acid esters, with one or two fatty acids bound to the two hydroxyl-groups. For this reason, saponification (de-esterification) of lutein esters to yield free lutein may yield lutein in any ratio from 1:1 to 1:2 molar ratio with the saponifying fatty acid.

ChatGPT

  1. lutein

    Lutein is a naturally occurring carotenoid vitamin, an organic pigment found in various foods such as vegetables and egg yolks. It’s commonly known for its potential health benefits including protecting vision by filtering harmful blue light, and acting as an antioxidant that can reduce the risk of chronic diseases. It is not made by the body and must be obtained from diet or supplements.

Webster Dictionary

  1. Luteinnoun

    a substance of a strongly marked yellow color, extracted from the yelk of eggs, and from the tissue of the corpus luteum

  2. Etymology: [From corpus luteum.]

Wikidata

  1. Lutein

    Lutein is a xanthophyll and one of 600 known naturally occurring carotenoids. Lutein is synthesized only by plants and like other xanthophylls is found in high quantities in green leafy vegetables such as spinach and kale. In green plants, xanthophylls act to modulate light energy and serve as non-photochemical quenching agents to deal with triplet chlorophyll, which is overproduced at very high light levels, during photosynthesis. See xanthophyll cycle for this topic. Lutein is obtained by animals directly or indirectly, from plants. Lutein is apparently employed by animals as an antioxidant and for blue light absorption. Lutein is found in egg yolks and animal fats. In addition to coloring yolks, lutein causes the yellow color of chicken skin and fat, and is used in chicken feed for this purpose. The human retina accumulates lutein and zeaxanthin. The latter predominates at the macula lutea while lutein predominates elsewhere in the retina. There, it may serve as a photoprotectant for retina from the damaging effects of free radicals produced by blue light. The principal natural stereoisomer of lutein is-beta,epsilon-carotene-3,3′-diol. Lutein is a lipophilic molecule and is generally insoluble in water. The presence of the long chromophore of conjugated double bonds provides the distinctive light-absorbing properties. The polyene chain is susceptible to oxidative degradation by light or heat and is chemically unstable in acids.

U.S. National Library of Medicine

  1. Lutein

    A carotenoid alcohol widespread in nature. It is present in egg yolk, algae, and petals of yellow flowers, among other sources.

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Numerology

  1. Chaldean Numerology

    The numerical value of lutein in Chaldean Numerology is: 6

  2. Pythagorean Numerology

    The numerical value of lutein in Pythagorean Numerology is: 9

Examples of lutein in a Sentence

  1. Puja Agarwal:

    The combination of different nutrients and bioactives in green leafy vegetables make them unique, they are very rich in many bioactives, flavonoids and lutein, which is important for brain health.

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"lutein." Definitions.net. STANDS4 LLC, 2024. Web. 29 Mar. 2024. <https://www.definitions.net/definition/lutein>.

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