Lutein: A Plant Pigment That Provides Protection From The Sun
|Lutein: A Plant Pigment That Provides Protection From The Sun||Darrell Miller||10/23/07|
October 23, 2007 10:00 AM
Author: Darrell Miller (email@example.com)
Subject: Lutein: A Plant Pigment That Provides Protection From The Sun
Lutein is a plant pigment, and protects protection from the sun needed to prevent damage to the skin and eyes from its strong ultra violet (UVB) radiation. Lutein is a carotenoid and strong antioxidant that is found in red, yellow, orange and dark green fruit and vegetables such as broccoli, curly and sea kale, spinach, carrots peppers and squashes. It is also available from egg yolks, corn and some fruits such as pomegranates. It is the colored pigments, especially the reds, yellows and oranges, in which lutein is most found.
Lutein can also prevent cataracts and provide benefits for age related macular degeneration. However, before discussing the benefits, it is necessary to discuss exactly what these conditions are and what causes them. Let’s have a heads up on cataracts first.
A cataract takes the form of a clouding of the lens of the eye that leads to blurred vision and eventual virtual blindness when the cloudiness is extreme. It is not blindness due to problems with the nerves of the eye, but due to the lens become cloudy, and scattering light entering the eye. It is not a film over the eye as many people believe, but a cloudiness of the lens, and cataracts can normally be treated by removing the whole lens and replacing it with a lens implant – or a synthetic lens.
It is not fully understood how lutein can help cataracts, but studies have shown that those take a large quantity of lutein in there diet have up to 50% less chance of getting cataracts that those that do not. It has also been demonstrated that men who ate broccoli and spinach regularly had a 25% less chance of getting cataracts. The same is true of those that include a lutein supplement of around 6 mg daily, although up to 20 mg is considered an effective dose.
However, it not only through its properties in protecting against cataracts that lutein can help to preserve the health of your eyes. It is also through its effect on macular degeneration. The macula is small part in the center of the retina that allows you to see central vision in high detail, especially close up when you use the center of your eye. Age-related macular degeneration, known as MD, affects your macula so that you can see fine round the edges, but your central vision is blurred. It is therefore difficult to drive, read or carry out tasks that need good central focus. You will find it next to impossible to thread a needle for example. It can come on very slowly, in fact so slowly that you never notice it because the change from day to day, or even week to week, is so small.
It is not coincidence that lutein is concentrated in the macula, and that a lutein supplement can help to prevent macular degeneration. Lutein is believed to filter out some of the blue wavelengths of light, and it is the blue wavelengths that are though to cause free radical damage and oxidative stress to various organs of the body exposed to light, but specifically the eyes. That is why it is believed that lutein helps to prevent macular degeneration, and studies have indicated a good supplement to consist of up to 30 mg each day.
It can also protect the skin from damage by UV radiation, and also prevents free radical damage to skin cells causing premature aging of the skin. The latter occurs through its antioxidant properties, while the former is because if its light filtering properties. It can not only filter out the blue light that can cause macular degeneration but also ultra-violet radiation that affects the skin and can cause skin cancer. There is a fine line between the blue and ultra violet wavelengths from sunlight, and both can contribute to certain medical conditions. However, the absorptive properties of lutein are such that it can absorb the more harmful of these.
The antioxidant properties of lutein are important in their own right, and can help to reduce cholesterol deposition in arties and help to maintain a healthy arterial wall thickness. The same is true of any carotenoids that reduce heart problems, some cancers, especially of the cervix, stomach and lungs, and others that can be caused by free radical action and narrowed arteries such as strokes and brain hemorrhages.
Although it is not one of those supplements considered essential, lutein is biologically essential in that it cannot be produced by the body. It has to be taken through the diet. There is no specific recommended daily allowance (RDA) because life can go on without it, but it does play a role in your everyday health.
However, the average person has a lutein intake less than that needed to take advantage of its UV protection or antioxidant effect. As previously stated, the effective dose is considered to be 30 mg daily, and the average American intake is about 2 mg. That’s an awful lot of egg yolks or tomatoes you are going to have to eat! If you do intend to take your lutein from the natural source, then it much more easily assimilated into your body if not overcooked. Lightly steaming is the best way to prepare your vegetables for maximum nutritional effect.
You can also take lutein as a supplement in the form of tablets, creams and drinks, and can also be found in other supplements that contain carotenoids such as lycopene and beta-carotene. Although not consider essential to life, do not underestimate the health benefits to be gained from a diet high in lutein, especially if you value the health of your eyes.
All strong antioxidants provide you with health benefits due to their ability to destroy the free radicals that in turn destroy the DNA in your body cells, and disrupt the cells themselves. Combine that with their action as filters to the damaging rays of the sun and you have in lutein a plant product that is far reaching in the health benefits that it can provide you with. If you are looking for a lutein supplement, stop into your local or internet health food store for lutein is an over the counter supplement.