Archive for 'lutein'

lutein

Posted on 17. Jan, 2011 by .

0

Lutein is an antioxidant, which belongs to the carotenoid family. Lutein is a yellow coloured pigment. Although lutein is not categorized as a vitamin, dietary lutein is believed to be an essential nutrient for normal vision. a group of naturally occurring fat-soluble pigments found in plants. Lutein is the principal carotenoid present in the macula. The macula is responsible for supporting the health of the eye’s photoreceptor cell layer, which is why carotenoid levels are so important.

Lutein is concentrated in the retinas of your eyes and is necessary for good vision. A diet rich in lutein may lower your risk of developing cataracts and macular degeneration.
Lutein may also help prevent or slow down atherosclerosis, the thickening of arteries, which is a major risk for cardiovascular disease

Distribution
Lutein is found in egg yolk and many plants and vegetables, including red peppers, mustard, broccoli, zucchini, corn, garden peas, spinach, leek, collard greens and kale. Carrots, squash and other orange and yellow fruits and vegetables are sources of lutein. Green leafy vegetables, also contain high amounts of luteinLutein is responsible for the colouring of many fruits and vegetables.

Health Benefits of Lutein
Lutein is an antioxidant which is believed to be an essential nutrient for normal vision. The protective role of lutein against eye damage is well document. Studies have also indicated that lutein improves heart health, protects our skin against UV damage, reduces diabetes induced oxidative stress, and possesses anti-inflammatory and anti-cancer properties.

Eye protection
The central part of the retina, called the macula,[At the back of the eye the macula is a tiny area about 5 mm in diameter, with the fovea at its centre. There are no blood vessels, but lots of cells full of photosensitive pigments that allow us to see detail in the centre of vision. As we get older, the cells with retinal pigment become less efficient, the membrane degenerates, some cells atrophy, waste products build up, and central vision is gradually lost. ] contains macular pigments in which lutein is concentrated. The yellow coloured pigments protect the retina from damage of the photo-oxidative affect of high-energy light. Lutein offers eye protection by lowering the risk of age related vision loss, which causes gradual loss of central vision. Age related vision loss or age related macular degeneration is caused by steady damage of the retina.

Lutein Research – Blinded Study with Visible Results
Lutein has been shown to be beneficial to long term visual health. Seventeen participants were randomized in a double-blind study involving dietary supplementation with Lutein (15 mg), alpha-tocopherol (100 mg), or placebo, three times a week for up to two years.1 Visual performance, acuity and glare sensitivity were measured as parameters of vision health. In all parameters measured, subjects that consumed the Lutein had significant improvements in vision health when compared to the other groups.

In another recent placebo-controlled study, Lutein resulted in a significant improvement in eye pigment and optical density when compared to the placebo.2 The Lutein groups also significantly improved their visual acuity when compared to placebo

Heart health
Lutein can also reduce the risk for artery diseases. Studies have shown that persons with the highest lutein intake showed the lowest artery wall thickening. Lutein also reduces the oxidation of LDL cholesterol thereby reducing the risk of artery clogging.

Skin protection
Lutein can also reduce the risk of skin cancer and sunburn. Under influence of sunlight, free radicals are formed inside the skin. These free radicals can damage the DNA of cells. Lutein can protect against the damaging effects of UV-B radiation.

Note: Many lutein supplements that claim to have 6 mg of lutein per capsule may use an herbal extract that has 5% lutein. For instance, common supplements of lutein 6 mg are derived from 120mg of 5% marigold extract. Our lutein supplement comes from a marigold extract that is more than 94 percent lutein, not 5 %.

thank you and references
http://nutrition.about.com/od/phytochemicals/p/Lutein.htm
http://www.phytochemicals.info/phytochemicals/lutein.php
http://www.medicine.ox.ac.uk/bandolier/band123/b123-2.html


eVitamins

Continue Reading