Archive for carotenoids
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Serum Lycopene, Other Carotenoids, and Prostate Cancer Risk: a Nested Case-Control Study in the Prostate, Lung, Colorectal, and Ovarian Cancer Screening Trial
Background: Reports from several studies have suggested that carotenoids, and in particular lycopene, could be prostate cancer–preventive agents. This has stimulated extensive laboratory and clinical research, as well as much commercial and public enthusiasm. However, the epidemiologic evidence remains inconclusive.
Materials and Methods: We investigated the association between prediagnostic serum carotenoids (lycopene, {alpha}-carotene, ß-carotene, ß-cryptoxanthin, lutein, [...]
Lutein
Lutein (from Latin lutea meaning “yellow”) is one of over 600 known naturally occurring carotenoids. Found in green leafy vegetables such as spinach and kale, lutein is employed by organisms as an antioxidant and for blue light absorption. Lutein is covalently bound to one or more fatty acids present in some fruits and flowers, notably [...]
Retinol
Retinol, the animal form of vitamin A, is a yellow fat-soluble, antioxidant vitamin important in vision and bone growth. It belongs to the family of chemical compounds known as retinoids. Retinol is ingested in a precursor form; animal sources (milk and eggs) contain retinyl esters, whereas plants (carrots, spinach) contain pro-vitamin A carotenoids. Hydrolysis of [...]
