Zeaxanthin For Macular Degeneration Prevention and Treatment in Dry AMD
Most ophthalmologists recommend the antioxidants lutein and zeaxanthin for macular degeneration that is age related, commonly referred to as AMD. It is unusual for doctor’s to recommend nutritional supplements of any kind, unless a person has an outright deficiency, but AMD is a unique condition.
There are no effective treatments for one type of AMD (dry), but there are some partially effective treatments for wet AMD. Together, these two are the major causes of blindness in the elderly. The wet form is the most severe, if not treated early.
In wet AMD, blood vessels grow up and behind the retina, an area responsible for gathering light and transmitting signals to the brain, resulting in sight. The blood vessels often rupture and leak blood and protein below the macula, a very sensitive area within the retina.
Eventually, bleeding, leaking and scarring causes irreversible damage to the light receptors (rods and cones). Rapid vision loss is experienced if it is left untreated. Laser treatment and drugs that inhibit blood vessel growth are usually recommended.
Generally, doctors recommend lutein and zeaxanthin for macular degeneration that is of the dry type. Dry AMD is much more common than wet. It is caused by a build up of yellow deposits called drusen on the retina.
In nature lutein and zeaxanthin are pigments or colors. They are normally present in the retina, with zeaxanthin being concentrated in the macula and lutein more highly concentrated in the periphery of the retina. There roles within the eye are not well understood, but they seem to help reduce or prevent the build up of drusen.
Drusen is similar in composition to the deposits that are found in the brains of Alzheimer’s patients and the plaque that is present in atherosclerosis. People with either of those two conditions have a higher risk of developing dry AMD.
Some doctors recommend taking lutein and zeaxanthin for macular degeneration prevention, particularly to their patients that have a family history of the disease. But, since the drusen are similar to the deposits that cause Alzheimer’s and heart disease, other antioxidants may be beneficial, as well.
Curcumin, an antioxidant present in the spice turmeric, is currently being studied for its benefit in Alzheimer’s disease. Not only does it prevent the accumulation of the plaque, it breaks it up. It might be able to break up the drusen in AMD, too.
One study indicates that the ideal combination of nutrients is omega 3 fatty acids, beta carotene, vitamin E, lutein and zeaxanthin for macular degeneration. Omega 3 fatty acids, particularly DHA, are the most abundant fatty acids present in the retina. Beta-carotene is converted by the body to vitamin A, which is essential for good vision. Vitamin E is well-known for its antioxidant activity.
Prevention is worth a pound of cure, they say. In order to prevent AMD, people should lower their total fat intake, and increase their nutrient intake. This may help reduce the risk of many other diseases, as well. Taking zeaxanthin for macular degeneration prevention is a good idea. Taking a multi-nutritional supplement that contains it, is a great one.
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