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Lutein (/ ˈ lj uː t i ɪ n,-t iː n /; [2] 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 .
Luteinizing hormone (LH, also known as luteinising hormone, [1] lutropin and sometimes lutrophin [2]) is a hormone produced by gonadotropic cells in the anterior pituitary gland.
In plants, the xanthophyll lutein is the most abundant carotenoid and its role in preventing age-related eye disease is currently under investigation. [5] Lutein and the other carotenoid pigments found in mature leaves are often not obvious because of the masking presence of chlorophyll. When chlorophyll is not present, as in autumn foliage ...
“The lutein and zeaxanthin in pumpkin can prevent cataracts and age-related macular degeneration to support healthy eyes,” she says. So if you want to keep your eyes healthy as you age ...
The group of xanthophylls includes (among many other compounds) lutein, zeaxanthin, neoxanthin, violaxanthin, flavoxanthin, and α- and β-cryptoxanthin. The latter compound is the only known xanthophyll to contain a beta-ionone ring, and thus β- cryptoxanthin is the only xanthophyll that is known to possess pro-vitamin A activity for mammals.
Conversion of lutein to meso-zeaxanthin. Meso-zeaxanthin is produced at an industrial level from the lutein obtained from marigold petals. The process involves saponification, which is carried out using high temperature and a high concentration of base, leads to the isomerization of the 4′-5′ double bond to the 5′-6′ position.
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