One of the mysteries of the English language finally explained.
A deep yellow pigment of the xanthophyll class, found in the leaves of plants, in egg yolk, and in the corpus luteum.
- ‘While the root of the beet is a nutritional powerhouse, the leaves are just as potent, containing antioxidant carotenoids, chlorophyll and lutein.’
- ‘The yellow colour comes largely from carotenoids, which hens get from plant foods, or lutein, which is added to feeds specifically to colour egg yolk.’
- ‘In this study, visual function is improved with lutein alone or lutein together with other nutrients.’
- ‘Companies don't usually test for phytochemicals like lutein or lycopene because they're not yet considered nutrients.’
- ‘Cataract patients also tend to be deficient in vitamin A and the carotenes, lutein and zeaxanthin.’
Mid 19th century: from Latin luteum ‘yolk of egg’ (neuter of luteus ‘yellow’) + -in.
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