lutein


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Related to lutein: lycopene, bilberry, zeaxanthin

lutein

[′lüd·ē·ən]
(biochemistry)
A dried, powdered preparation of corpus luteum.
References in periodicals archive ?
These human studies demonstrate that supplementation with lutein and zeaxanthin provides significant benefits in fighting glare and helping our eyes recover from sudden bright light exposures.
Indeed, one of our latest studies has found that many lutein supplements on the market contain very small amounts of meso-zeaxanthin - not disclosed on their product label - though not sufficient to improve macular pigment levels.
However, despite that conclusion, the results are consistent with the possibility of a small beneficial effect, particularly with lutein and zeaxanthin.
If lutein can protect against decline, we should encourage people to consume lutein-rich foods at a point in their lives when it has maximum benefit.
The researchers found an association between higher lutein and zeaxanthin levels and lower blood oxygen level-dependent signaling in a number of areas of the brain, which indicates that less brain activity was required for the memory task.
Previous studies have found that a person's lutein status is linked to cognitive performance across the lifespan," Ms.
Lutein may present a cytoprotective role on gastrointestinal mucosa, presenting antioxidant and free radical scavenging activity and anti-inflammatory and immunomodulatory effects (KRISHNASWAMYet al.
In addition to lutein, the product contains 5,000 meg of biotin, an important B-vitamin that helps strengthen hair and nails, and complexion enhancing ingredients collagen and hyaluronic acid.
In studies that track the eating habits of thousands of men and women, people with higher levels of lutein plus zeaxanthin in their diets have a lower risk of cataracts.
Comment: Observational studies and clinical trials suggest that lutein (and possibly the related carotenoid zeaxanthin) can prevent the development and slow the progression of age-related macular degeneration.
In a rat model of endotoxin-induced uveitis lutein blocks the degradation of inhibitory kB-a from the cytosolic fraction and prevents NF-kappa-B (NF-[kappa]B) translocation, decreasing inducible gene transcription and synthesis of inflammatory mediators (Figure 1) [20, 21].