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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.
Healthspan Direct was founded by Derek Coates in 1996, with an initial catalogue of 10 products, eventually expanding to more than 150 products including nutritional supplements, herbal range products, skincare and cosmetic products (under the Nurture name) and veterinary supplements (as VetVits).
[46] [needs update] Including lutein and zeaxanthin supplements in with a multivitamin does not improve progression of macular degeneration. [46] The need for high-quality studies looking at the safety of taking multivitamins has been highlighted. [46] According to the Harvard School of Public Health: "... many people don't eat the healthiest ...
In 2012, the Physicians' Health Study II (PHS-II) found that participants who took a Centrum-brand multivitamin each day for an average of 11 years had no change in cancer mortality or cardiovascular disease mortality compared to the placebo group.
Together these suppliers account for about 85% of the β-carotene on the market. [19] In Spain Vitatene produces natural β-carotene from fungus Blakeslea trispora, as does DSM but at much lower amount when compared to its synthetic β-carotene operation.
The Age-Related Eye Disease Study (AREDS) was a clinical trial sponsored by the National Eye Institute that ran from 1992 to 2001. [1] The study was designed to: investigate the natural history and risk factors of age-related macular degeneration (AMD) and cataracts, and
China produces about 70% of the global vitamin C market. The rest is split among European Union, India and North America. The global market is expected to exceed 141 thousand metric tons in 2024. [103] Cost per metric ton (1000 kg) in US dollars was $2,220 in Shanghai, $2,850 in Hamburg and $3,490 in the US. [104]
Zeaxanthin is one of the most common carotenoids in nature, and is used in the xanthophyll cycle.Synthesized in plants and some micro-organisms, it is the pigment that gives paprika (made from bell peppers), corn, saffron, goji (wolfberries), and many other plants and microbes their characteristic color.